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Expert: Peter Uetz

ITIS records citing expert
 
 Kingdom Animalia
  Ablabes olivaceus Beddome, 1863 -- invalid
  Ablabes periops Günther, 1872 -- invalid
  Ablabes periops praefrontalis Mocquard, 1890 -- invalid
  Achalinus ater Bourret, 1937 -- valid -- Bourret's Odd-scaled Snake
  Achalinus formosanus Boulenger, 1908 -- valid -- Formosa Odd-scaled Snake
  Achalinus formosanus chigirai Ota And Toyama, 1989 -- valid
  Achalinus formosanus formosanus Boulenger, 1908 -- valid
  Achalinus hainanus Huang, 1975 -- valid -- Hainan Odd-scaled Snake
  Achalinus jinggangensis (Zong and Ma, 1983) -- valid -- Zong's Odd-scaled Snake
  Achalinus meiguensis Hu and Zhao, 1966 -- valid -- Szechwan Odd-scaled Snake
  Achalinus niger Maki, 1931 -- valid -- Black Odd-scaled Snake
  Achalinus rufescens Boulenger, 1888 -- valid -- Boulenger's Odd-scaled Snake
  Achalinus spinalis Peters, 1869 -- valid -- Japanese Odd-scaled Snake, Peters' Odd-scaled Snake
  Achalinus werneri Van Denburgh, 1912 -- valid -- Amami Odd-scaled Snake
  Acrantophis dumerili Jan in Jan and Sordelli, 1860 -- valid
  Acrantophis madagascariensis (Duméril and Bibron, 1844) -- valid
  Adelophis Dugès, 1879 -- valid
  Adelophis copei Dugès, 1879 -- valid -- Cope's Mountain Meadow Snake, Culebra-de vega de Cope
  Adelophis foxi Rossman and Blaney, 1968 -- valid -- Culebra-de vega de Fox, Fox's Mountain Meadow Snake
  Adelphicos daryi Campbell and Ford, 1982 -- valid -- Dary's Burrowing Snake
  Adelphicos ibarrorum Campbell and Brodie, 1988 -- valid
  Adelphicos latifasciatum Lynch and H. M. Smith, 1966 -- valid -- Oaxacan Burrowing Snake
  Adelphicos nigrilatum H. M. Smith, 1942 -- valid -- Burrowing Snake
  Adelphicos quadrivirgatum Jan, 1862 -- valid -- Middle American Burrowing Snake
  Adelphicos quadrivirgatum newmanorum Taylor, 1950 -- invalid
  Adelphicos quadrivirgatum sargii (Fischer, 1885) -- invalid
  Adelphicos quadrivirgatum visoninus (Cope, 1866) -- invalid
  Adelphicos veraepacis Stuart, 1941 -- valid -- Stuart's Burrowing Snake
  Aeluroglena cucullata Boulenger, 1898 -- valid -- Somali Snake
  Afronatrix Rossman and Eberle, 1977 -- valid
  Afronatrix anoscopus (Cope, 1861) -- valid -- African Brown Water Snake
  Agkistrodon bilineatus Günther, 1863 -- valid -- Cantil enjaquimado, Mexican Moccasin
  Agkistrodon contortrix (Linnaeus, 1766) -- valid -- Cantil cobrizo, Copperhead
  Agkistrodon contortrix contortrix (Linnaeus, 1766) -- valid -- Southern Copperhead
  Agkistrodon contortrix laticinctus Gloyd and Conant, 1934 -- valid -- Broad-banded Copperhead
  Agkistrodon contortrix mokasen Palisot de Beauvois, 1799 -- valid -- Northern Copperhead
  Agkistrodon contortrix phaeogaster Gloyd, 1969 -- valid -- Osage Copperhead
  Agkistrodon contortrix pictigaster Gloyd and Conant, 1943 -- valid -- Trans-Pecos Copperhead
  Agkistrodon howardgloydi Conant, 1984 -- valid -- Gloyd's Moccasin
  Agkistrodon piscivorus (Lacépède, 1789) -- valid -- Cottonmouth
  Agkistrodon piscivorus conanti Gloyd, 1969 -- valid -- Florida Cottonmouth
  Agkistrodon piscivorus leucostoma (Troost, 1836) -- valid -- Western Cottonmouth
  Agkistrodon piscivorus piscivorus (Lacépède, 1789) -- valid -- Eastern Cottonmouth
  Agkistrodon russeolus Gloyd, 1972 -- valid -- Cantil, Mexican Moccasin
  Agkistrodon taylori Burger and Robertson, 1951 -- valid -- Mexican Moccasin
  Ahaetulla dispar (Günther, 1864) -- valid -- Günther's Vine Snake, Indian Bronzeback
  Ahaetulla fasciolata (Fischer, 1885) -- valid -- Speckle-headed Whipsnake, Spotted Whipsnake
  Ahaetulla fronticincta (Günther, 1858) -- valid -- Burmese Vine Snake, Günther's Whipsnake
  Ahaetulla mycterizans (Linnaeus, 1758) -- valid -- Malayan Whipsnake
  Ahaetulla nasuta (Lacépède, 1789) -- valid -- Green Vine Snake, Long-nosed Tree Snake, Long-nosed Whip Snake
  Ahaetulla perroteti (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Western Ghats Bronzeback
  Ahaetulla prasina (F. Boie, 1827) -- valid -- Asian Vine Snake, Gunther's Whip Snake, Jade Vine Snake, Oriental Whipsnake
  Ahaetulla prasina medioxima Lazell, 2002 -- valid
  Ahaetulla prasina prasina (F. Boie, 1827) -- valid
  Ahaetulla prasina preocularis (Taylor, 1922) -- valid
  Ahaetulla prasina suluensis Gaulke, 1994 -- valid
  Ahaetulla pulverulenta (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Brown-speckled Whipsnake
  Alluaudina bellyi Mocquard, 1894 -- valid
  Alluaudina mocquardi Angel, 1939 -- valid
  Alsophis antiguae Parker, 1933 -- valid -- Antiguan Racer
  Alsophis antillensis (Schlegel, 1837) -- valid -- Antilles Racer, Leeward Racer
  Alsophis danforthi Cochran, 1938 -- valid
  Alsophis manselli Parker, 1933 -- valid -- Montserrat Racer
  Alsophis rijgersmaei Cope, 1869 -- valid -- Anguilla Racer, Antilles Racer, Leeward Islands Racer
  Alsophis rufiventris (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Orange-bellied Racer, Saba Racer
  Alsophis sajdaki Henderson, 1990 -- valid
  Alsophis sanctonum Barbour, 1915 -- valid
  Alsophis sibonius Cope, 1879 -- valid -- Dominican Racer
  Amastridium veliferum Cope, 1861 -- valid -- Culebra cabeza cobriza, Rustyhead Snake
  Amastridium veliferum sapperi (Werner, 1903) -- invalid
  Amblyodipsas concolor (A. Smith, 1849) -- valid -- Natal Purple-glossed Snake
  Amblyodipsas dimidiata (Günther, 1888) -- valid -- Mpwapwa Purple-glossed Snake
  Amblyodipsas katangensis de Witte and Laurent, 1942 -- valid -- Katanga Purple-glossed Snake
  Amblyodipsas katangensis ionidesi Loveridge, 1951 -- valid
  Amblyodipsas katangensis katangensis de Witte and Laurent, 1942 -- valid
  Amblyodipsas microphthalma (Bianconi, 1852) -- valid -- Eastern Purple-glossed Snake
  Amblyodipsas microphthalma microphthalma (Bianconi, 1852) -- valid
  Amblyodipsas microphthalma nigra Jacobsen, 1986 -- valid
  Amblyodipsas polylepis (Bocage, 1873) -- valid -- Common Purple-glossed Snake
  Amblyodipsas polylepis hildebrandtii (Peters, 1877) -- valid -- Common Purple-glossed Snake
  Amblyodipsas polylepis polylepis (Bocage, 1873) -- valid -- Common Purple-glossed Snake
  Amblyodipsas rodhaini (de Witte, 1930) -- valid -- Rodhain's Purple-glossed Snake
  Amblyodipsas teitana Broadley, 1971 -- valid -- Teitana Purple-glossed Snake
  Amblyodipsas unicolor (Reinhardt, 1843) -- valid -- Dull Purple-glossed Snake, Western Purple-glossed Snake
  Amblyodipsas ventrimaculata (Roux, 1907) -- valid -- Kalahari Purple-glossed Snake
  Amnesteophis melanauchen (Jan, 1863) -- valid
  Amphiesma A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Amphiesma flaviceps A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- invalid
  Amphiesma stolatum (Linnaeus, 1758) -- valid -- Buff Striped Keelback
  Amphiesma vibakari danjoense Toriba, 1986 -- invalid
  Amphiesmoides Malnate, 1961 -- valid
  Amphiesmoides ornaticeps (Werner, 1924) -- valid -- Werner's Ornate Snake
  Amplorhinus multimaculatus A. Smith, 1847 -- valid -- Cape Reed Snake, Many-spotted Snake
  Anoplohydrus Werner, 1909 -- valid
  Anoplohydrus aemulans Werner, 1909 -- valid
  Aparallactus capensis A. Smith, 1849 -- valid -- Cape Centipede Eater
  Aparallactus capensis bocagei Boulenger, 1895 -- valid
  Aparallactus capensis capensis A. Smith, 1849 -- valid
  Aparallactus capensis luebberti Sternfeld, 1910 -- invalid
  Aparallactus capensis punctatolineatus Boulenger, 1895 -- valid
  Aparallactus guentheri Boulenger, 1895 -- valid -- Black Centipede Eater
  Aparallactus jacksonii (Günther, 1888) -- valid -- Jackson's Centipede-eater
  Aparallactus lineatus (Peters, 1870) -- valid -- Lined Centipede-eater
  Aparallactus lunulatus (Peters, 1854) -- valid -- Plumbeous Centipede Eater, Reticulated Centipede Eater
  Aparallactus lunulatus lunulatus (Peters, 1854) -- valid
  Aparallactus lunulatus nigrocollaris Chabanaud, 1916 -- valid
  Aparallactus lunulatus scortecci Parker, 1949 -- valid
  Aparallactus modestus (Günther, 1859) -- valid -- Western Forest Centipede-eater
  Aparallactus modestus modestus (Günther, 1859) -- valid
  Aparallactus modestus ubangensis Boulenger, 1897 -- valid
  Aparallactus moeruensis de Witte and Laurent, 1943 -- valid -- Zaire Centipede-eater
  Aparallactus niger Boulenger, 1897 -- valid
  Aparallactus nigriceps (Peters, 1854) -- valid -- Mozambique Centipede Eater
  Aparallactus turneri Loveridge, 1935 -- valid -- Malindi Centipede-eater
  Aparallactus werneri Boulenger, 1895 -- valid -- Usambara Centipede-eater
  Aplopeltura boa (H. Boie, 1828) -- valid -- Blunt-headed Slug Eating Snake, Blunthead Slug Snake
  Apostolepis albicollaris De Lema, 2002 -- valid
  Apostolepis ambiniger (Peters, 1869) -- valid
  Apostolepis ammodites Ferrarezzi, Erritto Barbo and España Albuquerque, 2005 -- valid
  Apostolepis arenaria Rodrigues, 1993 -- valid
  Apostolepis assimilis (Reinhardt, 1861) -- valid -- Reinhardt's Burrowing Snake
  Apostolepis breviceps Harvey, Gonzales and Scrocchi, 2001 -- valid
  Apostolepis cearensis Gomes, 1915 -- valid -- Gomes' Burrowing Snake
  Apostolepis cerradoensis De Lema, 2003 -- valid
  Apostolepis christineae De Lema, 2002 -- valid
  Apostolepis coronata (Sauvage, 1877) -- invalid
  Apostolepis dimidiata (Jan, 1862) -- valid
  Apostolepis dorbignyi (Schlegel, 1837) -- valid -- Bolivian Burrowing Snake
  Apostolepis flavotorquata (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Central Burrowing Snake
  Apostolepis gaboi Rodrigues, 1993 -- valid
  Apostolepis goiasensis Prado, 1942 -- valid -- Goias Burrowing Snake
  Apostolepis intermedia Koslowsky, 1898 -- valid -- Mato Grosso Burrowing Snake
  Apostolepis longicaudata Gomes, 1921 -- valid -- Longhead Burrowing Snake
  Apostolepis multicincta Harvey, 1999 -- valid
  Apostolepis nelsonjorgei De Lema and Renner, 2004 -- valid
  Apostolepis niceforoi Amaral, 1935 -- valid -- Amazon Burrowing Snake
  Apostolepis nigrolineata (Peters, 1869) -- valid
  Apostolepis nigroterminata Boulenger, 1896 -- valid -- Peru Burrowing Snake
  Apostolepis phillipsae Harvey, 1999 -- valid
  Apostolepis polylepis Amaral, 1921 -- valid
  Apostolepis pymi Boulenger, 1903 -- valid
  Apostolepis quirogai Giraudo and Scrocchi, 1998 -- valid
  Apostolepis serrana De Lema and Renner, 2006 -- valid
  Apostolepis striata De Lema, 2004 -- valid
  Apostolepis tenuis Ruthven, 1927 -- valid -- Ruthven's Burrowing Snake
  Apostolepis vittata (Cope, 1887) -- valid
  Aprosdoketophis andreonei Wallach, Lanza and Nistri, 2010 -- valid
  Archelaphe bella (Stanley, 1917) -- valid -- Bella Rat Snake, Burmese Rat Snake
  Archelaphe bella bella (Stanley, 1917) -- valid
  Archelaphe bella chapaensis (Bourret, 1934) -- valid
  Argyrogena fasciolata (Shaw, 1802) -- valid -- Banded Racer
  Arizona elegans Kennicott in Baird, 1859 -- valid -- Culebra brillante, Glossy Snake
  Arizona elegans arenicola Dixon, 1960 -- valid -- Texas Glossy Snake
  Arizona elegans candida Klauber, 1946 -- valid -- Mojave Glossy Snake
  Arizona elegans eburnata Klauber, 1946 -- valid -- Desert Glossy Snake
  Arizona elegans elegans Kennicott in Baird, 1859 -- valid -- Eastern Glossy Snake, Kansas Glossy Snake
  Arizona elegans noctivaga Klauber, 1946 -- valid -- Arizona Glossy Snake
  Arizona elegans occidentalis Blanchard, 1924 -- valid -- California Glossy Snake, Painted Desert Glossy Snake, Western Glossy Snake
  Arizona elegans philipi Klauber, 1946 -- valid -- Painted Desert Glossy Snake
  Arrhyton ainictum Schwartz and Garrido, 1981 -- valid -- Cuban Island Racer
  Arrhyton dolichura Werner, 1909 -- valid -- Habana Island Racer
  Arrhyton procerum Hedges and Garrido, 1992 -- valid -- Zapata Long-tailed Groundsnake
  Arrhyton redimitum (Cope, 1863) -- valid
  Arrhyton supernum Hedges and Garrido, 1992 -- valid -- Oriente Black Groundsnake
  Arrhyton taeniatum Günther, 1858 -- valid -- Günther's Island Racer
  Arrhyton tanyplectum Schwartz and Garrido, 1981 -- valid -- San Vincente Island Racer
  Arrhyton vittatum (Gundlach, 1861) -- valid -- Common Island Racer
  Aspidura Wagler, 1830 -- valid
  Aspidura brachyorrhos (F. Boie, 1827) -- valid -- Boie's Rough-sided Snake
  Aspidura ceylonensis (Günther, 1858) -- valid -- Ceylon Keelback
  Aspidura copei Günther, 1864 -- invalid
  Aspidura deraniyagalae Gans and Fetcho, 1982 -- valid -- Sri Lanka Rough-sided Snake
  Aspidura drummondhayi Boulenger, 1904 -- valid -- Drummond-Hay's Rough-sided Snake
  Aspidura guentheri Ferguson, 1876 -- valid -- Günther's Rough-sided Snake
  Aspidura trachyprocta Cope, 1860 -- valid -- Common Rough-sided Snake
  Asthenodipsas laevis (F. Boie, 1827) -- valid -- Smooth Slug Snake
  Asthenodipsas lasgalenensis Loredo, Wood, Quah, Anuar, Greer, Ahmad and Grismer, 2013 -- valid -- Mirkwood Forest Slug Snake
  Asthenodipsas malaccanus Peters, 1864 -- valid -- Malayan Slug Snake
  Asthenodipsas tropidonotus (Lidth de Jeude, 1923) -- valid -- Sumatra Slug Snake
  Asthenodipsas vertebralis (Boulenger, 1900) -- valid -- Asian Slug Snake, Mountain Snail Snake
  Atheris acuminata Broadley, 1998 -- valid -- Acuminate Bush Viper
  Atheris barbouri Loveridge, 1930 -- valid -- Uzungwe Mountain Bush Viper
  Atheris broadleyi Lawson, 1999 -- valid
  Atheris ceratophora Werner, 1896 -- valid
  Atheris chlorechis (Pel, 1851) -- valid
  Atheris desaixi Ashe, 1968 -- valid -- Ashe's Bush Viper
  Atheris hirsuta Ernst and Rödel, 2002 -- valid
  Atheris hispida Laurent, 1955 -- valid -- African Hairy Bush Viper
  Atheris katangensis de Witte, 1953 -- valid -- Katanga Mountain Bush Viper
  Atheris mabuensis Branch and Bayliss, 2009 -- valid
  Atheris matildae Menegon, Davenport and Howell, 2011 -- valid -- Matilda's Horned Viper
  Atheris nitschei Tornier, 1902 -- valid -- Great Lakes Bush Viper
  Atheris rungweensis Bogert, 1940 -- valid -- Mt. Rungwe Bush Viper
  Atheris squamigera (Hallowell, 1854) -- valid -- African Bush Viper, Rough-scaled Bush Viper, Variable Bush Viper
  Atheris squamigera robusta Laurent, 1956 -- invalid
  Atheris squamigera squamigera (Hallowell, 1854) -- invalid
  Atheris subocularis Fischer, 1888 -- valid
  Atractaspis andersonii Boulenger, 1905 -- valid -- Arabian Small-Scaled Burrowing Asp
  Atractaspis aterrima Günther, 1863 -- valid -- Mole Viper, Slender Burrowing Asp
  Atractaspis bibronii A. Smith, 1849 -- valid -- Bibron's Burrowing Asp, Southern Burrowing Asp
  Atractaspis bibronii bibronii A. Smith, 1849 -- valid
  Atractaspis bibronii rostrata Günther, 1868 -- valid
  Atractaspis boulengeri Mocquard, 1897 -- valid -- Mole Viper
  Atractaspis boulengeri boulengeri Mocquard, 1897 -- valid
  Atractaspis boulengeri matschiensis Werner, 1897 -- valid
  Atractaspis boulengeri mixta Laurent, 1945 -- valid
  Atractaspis boulengeri schmidti Laurent, 1945 -- valid
  Atractaspis boulengeri schultzei Sternfeld, 1917 -- valid
  Atractaspis boulengeri vanderborghti Laurent, 1956 -- valid
  Atractaspis congica Peters, 1877 -- valid -- Congo Stiletto Snake
  Atractaspis congica congica Peters, 1877 -- valid
  Atractaspis congica leleupi Laurent, 1950 -- valid
  Atractaspis congica orientalis Laurent, 1945 -- valid
  Atractaspis corpulenta (Hallowell, 1854) -- valid -- Mole Viper
  Atractaspis corpulenta corpulenta (Hallowell, 1854) -- valid
  Atractaspis corpulenta kivuensis Laurent, 1958 -- valid
  Atractaspis corpulenta leucura Mocquard, 1885 -- valid
  Atractaspis dahomeyensis Bocage, 1887 -- valid -- Mole Viper
  Atractaspis duerdeni Gough, 1907 -- valid -- Beaked Burrowing Asp, Duerden's Asp, Duerden's Burrowing Asp
  Atractaspis engaddensis Haas, 1950 -- valid -- Israeli Mole Viper
  Atractaspis engdahli Lönnberg and Andersson, 1913 -- valid -- Mole Viper
  Atractaspis fallax Peters, 1867 -- valid -- Peters' Burrowing Asp
  Atractaspis irregularis (Reinhardt, 1843) -- valid -- Variable Burrowing Asp
  Atractaspis irregularis angeli Laurent, 1950 -- valid
  Atractaspis irregularis bipostocularis Boulenger, 1905 -- valid
  Atractaspis irregularis irregularis (Reinhardt, 1843) -- valid
  Atractaspis irregularis parkeri Laurent, 1945 -- valid
  Atractaspis irregularis uelensis Laurent, 1945 -- valid
  Atractaspis leucomelas Boulenger, 1895 -- valid -- Ogaden Burrowing Asp
  Atractaspis magrettii Scortecci, 1928 -- valid -- Magretti's Burrowing Asp
  Atractaspis microlepidota Günther, 1866 -- valid -- Small-Scaled Burrowing Asp
  Atractaspis micropholis Günther, 1872 -- valid -- Sahelian Burrowing Asp
  Atractaspis phillipsi Barbour, 1913 -- valid -- Phillips' Burrowing Asp
  Atractaspis reticulata Sjöstedt, 1896 -- valid -- Mole Viper
  Atractaspis reticulata brieni Laurent, 1956 -- valid
  Atractaspis reticulata heterochilus Boulenger, 1901 -- valid
  Atractaspis reticulata reticulata Sjöstedt, 1896 -- valid
  Atractaspis scorteccii Parker, 1949 -- valid -- Somali Burrowing Asp
  Atractaspis watsoni Boulenger, 1908 -- valid -- Watson's Burrowing Asp
  Atractus acheronius Passos, Rivas and Barrio-Amorós, 2009 -- valid
  Atractus albuquerquei da Cunha and Nascimento, 1983 -- valid -- Albuquerque Ground Snake
  Atractus alphonsehogei da Cunha and Nascimento, 1983 -- valid -- Alphonse's Ground Snake
  Atractus altagratiae Passos and Fernandes, 2008 -- valid
  Atractus andinus Prado, 1944 -- valid -- Andean Ground Snake
  Atractus apophis Passos and Lynch, 2010 -- valid
  Atractus arangoi Prado, 1939 -- valid
  Atractus atratus Passos and Lynch, 2010 -- valid
  Atractus attenuates Myers and Schargel, 2006 -- valid
  Atractus avernus Passos, Chiesse, Torres-Carvajal and Savage, 2009 -- valid
  Atractus ayeush Esqueda, 2011 -- valid
  Atractus badius (F. Boie, 1827) -- valid -- Boie's Ground Snake, French Guyana Ground Snake
  Atractus balzani Boulenger, 1898 -- valid -- Bolivian Ground Snake
  Atractus biseriatus Prado, 1941 -- valid -- Two-lined Ground Snake
  Atractus bocki Werner, 1909 -- valid -- Bock's Ground Snake
  Atractus bocourti Boulenger, 1894 -- valid -- Bocourt's Ground Snake
  Atractus boettgeri Boulenger, 1896 -- valid -- Boettger's Ground Snake
  Atractus boulengerii Peracca, 1896 -- valid
  Atractus caete Passos, Fernandes, Bérnils and Moura-Leite, 2010 -- valid
  Atractus carrioni Parker, 1930 -- valid -- Parker's Ground Snake
  Atractus caxiuana Da Costa Prudente and Santos-Costa, 2006 -- valid
  Atractus charitoae Silva Haad, 2004 -- valid
  Atractus chthonius Passos and Lynch, 2010 -- valid
  Atractus clarki Dunn and Bailey, 1939 -- valid -- Clark's Ground Snake
  Atractus collaris Peracca, 1897 -- valid -- Collared Ground Snake
  Atractus crassicaudatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Thickhead Ground Snake
  Atractus darienensis Myers, 2003 -- valid
  Atractus depressiocellus Myers, 2003 -- valid
  Atractus duboisi (Boulenger, 1880) -- valid
  Atractus duidensis Roze, 1961 -- valid -- Venezuela Ground Snake
  Atractus dunni Savage, 1955 -- valid -- Dunn's Ground Snake
  Atractus echidna Passos, Mueses-Cisneros, Lynch and Fernandes, 2009 -- valid
  Atractus ecuadorensis Savage, 1955 -- valid -- Ecuadorean Ground Snake, Ecuadorian Ground Snake
  Atractus edioi Da Silva, Rodrigues Silva, Ribeiro, Souza and Do Amaral Souza, 2005 -- valid
  Atractus elaps (Günther, 1858) -- valid -- Black Ground Snake
  Atractus emigdioi Gonzales-Sponga, 1971 -- valid -- Emigdio's Ground Snake
  Atractus emmeli (Boettger, 1888) -- valid -- Emmel's Ground Snake
  Atractus eriki Esqueda, la Marca and Bazó, 2007 -- valid
  Atractus erythromelas Boulenger, 1903 -- valid -- Red-black Ground Snake
  Atractus favae (Filippi, 1840) -- valid -- Filippi's Ground Snake
  Atractus flammigerus (F. Boie, 1827) -- valid -- Flaming Ground Snake
  Atractus franciscopaivai Silva Haad, 2004 -- valid
  Atractus francoi Passos, Fernandes, Bérnils and Moura-Leite, 2010 -- valid
  Atractus fuliginosus (Hallowell, 1845) -- valid -- Hallowell's Ground Snake
  Atractus gaigeae Savage, 1955 -- valid -- Gaige's Ground Snake
  Atractus gigas Myers and Schargel, 2006 -- valid
  Atractus guentheri (Wucherer, 1861) -- valid -- Günther's Ground Snake
  Atractus heliobelluomini Silva Haad, 2004 -- valid
  Atractus hoogmoedi Prudente and Passos, 2010 -- valid
  Atractus hostilitractus Myers, 2003 -- valid
  Atractus imperfectus Myers, 2003 -- valid
  Atractus indistinctus Prado, 1940 -- valid -- Indistinct Ground Snake
  Atractus insipidus Roze, 1961 -- valid
  Atractus iridescens Peracca, 1896 -- valid -- Iridescent Ground Snake
  Atractus lancinii Roze, 1961 -- valid -- Lancini's Ground Snake
  Atractus lasallei Amaral, 1931 -- valid -- Lasalle's Ground Snake
  Atractus latifrons (Günther, 1868) -- valid -- Broadhead Ground Snake
  Atractus lehmanni Boettger, 1898 -- valid -- Lehmann's Ground Snake
  Atractus limitaneus (Amaral, 1935) -- valid -- Limitan Ground Snake
  Atractus loveridgei Amaral, 1930 -- valid -- Loveridge's Ground Snake
  Atractus macondo Passos, Lynch and Fernandes, 2009 -- valid
  Atractus maculatus (Günther, 1858) -- valid -- Spotted Ground Snake
  Atractus major Boulenger, 1894 -- valid -- Big Ground Snake, Brown Ground Snake
  Atractus manizalesensis Prado, 1940 -- valid
  Atractus mariselae Lancini, 1969 -- valid -- Marisela's Ground Snake
  Atractus matthewi Markezich and Barrio-Amorós, 2004 -- valid
  Atractus medusa Passos, Mueses-Cisneros, Lynch and Fernandes, 2009 -- valid
  Atractus melanogaster Werner, 1916 -- valid -- Blackbelly Ground Snake
  Atractus melas Boulenger, 1908 -- valid -- Dark Ground Snake
  Atractus meridensis Esqueda and la Marca, 2005 -- valid
  Atractus micheleae Esqueda and la Marca, 2005 -- valid
  Atractus microrhynchus (Cope, 1868) -- valid
  Atractus mijaresi Esqueda and la Marca, 2005 -- valid
  Atractus modestus Boulenger, 1894 -- valid -- Modest Ground Snake
  Atractus multicinctus (Jan, 1865) -- valid -- Banded Ground Snake
  Atractus multidentatus Passos, Rivas and Barrio-Amorós, 2009 -- valid
  Atractus nasutus Passos, Fernandes and Lynch, 2009 -- valid
  Atractus natans Hoogmoed and Prudente, 2003 -- valid
  Atractus nicefori Amaral, 1930 -- valid -- Northern Ground Snake
  Atractus nigricaudus Schmidt and Walker, 1943 -- valid -- Black-headed Ground Snake
  Atractus nigriventris Amaral, 1933 -- valid -- Black-ventered Ground Snake
  Atractus obesus Marx, 1960 -- valid -- Fat Ground Snake
  Atractus obtusirostris Werner, 1916 -- valid -- Bignose Ground Snake
  Atractus occidentalis Savage, 1955 -- valid -- Western Ground Snake
  Atractus occipitoalbus (Jan, 1862) -- valid -- Gray Ground Snake
  Atractus ochrosetrus Esqueda and la Marca, 2005 -- valid
  Atractus oculotemporalis Amaral, 1932 -- valid -- Hispanic Ground Snake
  Atractus orcesi Savage, 1955 -- valid
  Atractus paisa Passos, Fernandes and Lynch, 2009 -- valid
  Atractus pamplonensis Amaral, 1937 -- valid -- Pamplona Ground Snake
  Atractus pantostictus Fernandes and Puorto, 1993 -- valid
  Atractus paraguayensis Werner, 1924 -- valid
  Atractus paravertebralis Henle and Ehrl, 1991 -- valid
  Atractus paucidens Despax, 1910 -- valid -- Despax's Ground Snake
  Atractus pauciscutatus Schmidt and Walker, 1943 -- valid -- Little-scaled Ground Snake
  Atractus peruvianus (Jan, 1862) -- valid -- Peru Ground Snake
  Atractus poeppigi (Jan, 1862) -- valid -- Basin Ground Snake
  Atractus potschi Fernandes, 1995 -- valid
  Atractus punctiventris Amaral, 1933 -- valid -- Pointed Ground Snake
  Atractus resplendens Werner, 1901 -- valid -- Resplendent Ground Snake
  Atractus reticulatus (Boulenger, 1885) -- valid -- Reticulate Ground Snake
  Atractus reticulatus reticulatus (Boulenger, 1885) -- valid
  Atractus reticulatus scrocchii Alvarez, Rey and Cei, 1992 -- valid
  Atractus riveroi Roze, 1961 -- valid -- Rivero's Ground Snake
  Atractus ronnie Passos, Fernandes and Borges-Nojosa, 2007 -- valid
  Atractus roulei Despax, 1910 -- valid -- Roule's Ground Snake
  Atractus sanctaemartae Dunn, 1946 -- valid -- St. Marta's Ground Snake
  Atractus sanguineus Prado, 1944 -- valid -- Bloody Ground Snake
  Atractus schach (F. Boie, 1827) -- valid -- Schach's Ground Snake
  Atractus serranus Amaral, 1930 -- valid -- Sao Paulo Ground Snake
  Atractus snethlageae da Cunha and Nascimento, 1983 -- valid
  Atractus spinalis Passos, Texeira Jr., Recoder, De Sena, Dal Vechio, De Arruda Pinto et al., 2013 -- valid
  Atractus steyermarki Roze, 1958 -- valid
  Atractus surucucu Prudente, 2008 -- valid
  Atractus taeniatus Griffin, 1916 -- valid
  Atractus tamaensis Esqueda and la Marca, 2005 -- valid
  Atractus tamessari Kok, 2006 -- valid
  Atractus taphorni Schargel and García-Pérez, 2002 -- valid
  Atractus thalesdelemai Passos, Fernandes and Zanella, 2005 -- valid
  Atractus titanicus Passos, Fernandes and Lynch, 2009 -- valid
  Atractus torquatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Neckband Ground Snake
  Atractus touzeti Schargel, Lamar, Passos, Valencia, Cisneros-Hereda and Campbell, 2013 -- valid
  Atractus trihedrurus Amaral, 1926 -- valid -- Southern Ground Snake
  Atractus trilineatus Wagler, 1828 -- valid -- Three-lined Ground Snake
  Atractus trivittatus Amaral, 1933 -- valid -- Three-banded Ground Snake
  Atractus turikensis Barros, 2000 -- valid
  Atractus typhon Passos, Mueses-Cisneros, Lynch and Fernandes, 2009 -- valid
  Atractus univittatus (Jan, 1862) -- invalid -- One-banded Ground Snake
  Atractus variegatus Prado, 1942 -- valid -- Variegated Ground Snake
  Atractus ventrimaculatus Boulenger, 1905 -- valid -- Speckled Ground Snake
  Atractus vertebralis Boulenger, 1904 -- valid -- Vertebral Ground Snake
  Atractus vertebrolineatus Prado, 1941 -- valid -- Striped Ground Snake
  Atractus vittatus Boulenger, 1894 -- valid
  Atractus wagleri Prado, 1945 -- valid -- Wagler's Ground Snake
  Atractus werneri Peracca, 1912 -- valid -- Werner's Ground Snake
  Atractus zebrinus (Jan, 1862) -- valid
  Atractus zidoki Gasc and Rodrigues, 1979 -- valid -- Zidok's Ground Snake
  Atretium Cope, 1861 -- valid
  Atretium schistosum (Daudin, 1803) -- valid -- Olive Keelback Wart Snake, Split Keelback
  Atretium yunnanensis Anderson, 1879 -- valid -- Yunnan Olive Keelback
  Atropoides indomitus E. N. Smith and Ferrari-Castro, 2008 -- valid
  Atropoides mexicanus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Central American Jumping Pit Viper
  Atropoides nummifer (Rüppell, 1845) -- valid -- Jumping Pit Viper, Nauyaca o nayaraca saltadora
  Atropoides occiduus (Hoge, 1966) -- valid
  Atropoides olmec (Perez-Higareda, H. M. Smith and Julia-Zertuche, 1985) -- valid -- Nauyaca de Los Tuxtlas, Olmecan Pit Viper
  Atropoides picadoi (Dunn, 1939) -- valid -- Picado's Pit Viper
  Azemiops feae Boulenger, 1888 -- valid -- Black-headed Burmese Viper, Fea Viper
  Azemiops kharini Orlov, Ryabov and Nguyen, 2013 -- valid -- White-headed Burmese Viper, White-headed Fea Viper
  Balanophis H. M. Smith, 1938 -- valid
  Balanophis ceylonensis (Günther, 1858) -- valid -- Sri Lankan Keelback Blossom Krait
  Bamanophis dorri (Lataste, 1888) -- valid
  Bitis albanica Hewitt, 1937 -- valid -- Albany Adder
  Bitis arietans (Merrem, 1820) -- valid -- Puff Adder
  Bitis arietans arietans (Merrem, 1820) -- valid
  Bitis arietans somalica Parker, 1949 -- valid
  Bitis armata (A. Smith, 1826) -- valid
  Bitis atropos (Linnaeus, 1758) -- valid -- Mountain Adder
  Bitis atropos atropos (Linnaeus, 1758) -- valid
  Bitis atropos unicolor Fitzsimons, 1959 -- valid
  Bitis caudalis (A. Smith, 1839) -- valid -- Horned Adder
  Bitis cornuta (Daudin, 1803) -- valid -- Many-horned Adder
  Bitis gabonica (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Gaboon Adder, Gaboon Viper
  Bitis heraldica (Bocage, 1889) -- valid -- Angolan Adder, Bocage's Horned Adder
  Bitis inornata (A. Smith, 1838) -- valid -- Hornless Adder, Plain Mountain Adder
  Bitis nasicornis (Shaw, 1802) -- valid -- Rhinoceros Viper
  Bitis parviocula Böhme, 1976 -- valid -- Bale Mountains Adder
  Bitis peringueyi (Boulenger, 1888) -- valid -- Dwarf Puff Adder, Peringuey's Adder
  Bitis rhinoceros (Schlegel, 1855) -- valid
  Bitis rubida Branch, 1997 -- valid
  Bitis schneideri (Boettger, 1886) -- valid -- Namaqua Dwarf Adder, Namaqua Puff Adder
  Bitis worthingtoni Parker, 1932 -- valid -- Kenya Horned Viper
  Bitis xeropaga Haacke, 1975 -- valid -- Desert Mountain Adder
  Blythia Theobold, 1868 -- valid
  Blythia reticulata (Blyth, 1854) -- valid -- Blyth's Reticulate Snake
  Boa constrictor Linnaeus, 1758 -- valid -- Boa Constrictor, Boa constrictor
  Boa constrictor amarali (Stull, 1932) -- valid
  Boa constrictor constrictor Linnaeus, 1758 -- valid
  Boa constrictor imperator Daudin, 1803 -- valid
  Boa constrictor longicauda Price and Russo, 1991 -- valid
  Boa constrictor mexicana Jan, 1863 -- valid
  Boa constrictor nebulosa (Lazell, 1964) -- valid
  Boa constrictor occidentalis Philippi, 1873 -- valid
  Boa constrictor orophias Linnaeus, 1758 -- valid
  Boa constrictor ortonii Cope, 1878 -- valid
  Boa constrictor sabogae (Barbour, 1906) -- valid
  Boa imperator Daudin, 1803 -- invalid
  Boaedon fuliginosus (F. Boie, 1827) -- valid -- African House Snake, Brown House Snake
  Boaedon fuliginosus fuliginosus (F. Boie, 1827) -- valid
  Boaedon fuliginosus mentalis Günther, 1888 -- valid
  Boaedon lineatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Striped House Snake
  Boaedon maculatus Parker, 1932 -- valid -- Dotted House Snake, Somali House Snake
  Boaedon olivaceus (A. H. A. Duméril, 1856) -- valid -- Olive House Snake
  Boaedon virgatus (Hallowell, 1854) -- valid -- Dark-bellied House Snake, Hallowell's House Snake
  Bogertophis rosaliae (Mocquard, 1899) -- valid -- Baja California Rat Snake, Baja California Ratsnake, Culebra-ratonera de Baja California
  Bogertophis subocularis (Brown, 1901) -- valid -- Culebra-ratonera de Transpecos, Trans-Pecos Rat Snake
  Bogertophis subocularis amplinotus Webb, 1990 -- valid
  Bogertophis subocularis subocularis (Brown, 1901) -- valid -- Trans-Pecos Rat Snake
  Boidae Gray, 1825 -- valid -- Boas, Boids
  Boiga andamanensis (Wall, 1909) -- valid -- Andaman Cat Snake
  Boiga angulata (W. C. H. Peters, 1861) -- valid -- Leyte Cat Snake, Philippine Blunt-headed Cat Snake
  Boiga barnesii (Günther, 1869) -- valid
  Boiga beddomei (Wall, 1909) -- valid -- Beddome's Cat Snake
  Boiga bengkuluensis Orlov, Kudryavtzev, Ryabov and Shumakov, 2003 -- valid
  Boiga bourreti Tillack, Ziegler and Khac Quyet, 2004 -- valid -- Bourret's Cat Snake
  Boiga ceylonensis (Günther, 1858) -- valid -- Sri Lanka Cat Snake
  Boiga cyanea (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Green Cat Snake
  Boiga cynodon (F. Boie, 1827) -- valid -- Dog-toothed Cat Snake
  Boiga dendrophila (F. Boie, 1827) -- valid -- Gold-ringed Cat Snake
  Boiga dendrophila annectens (Boulenger, 1896) -- valid
  Boiga dendrophila dendrophila (F. Boie, 1827) -- valid
  Boiga dendrophila divergens Taylor, 1922 -- valid
  Boiga dendrophila gemmicincta (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Boiga dendrophila latifasciata (Boulenger, 1896) -- valid
  Boiga dendrophila levitoni Gaulke, Demegillo and Vogel, 2005 -- valid
  Boiga dendrophila melanota (Boulenger, 1896) -- valid
  Boiga dendrophila multicincta (Boulenger, 1896) -- valid
  Boiga dendrophila occidentalis Brongersma, 1934 -- valid
  Boiga dightoni (Boulenger, 1894) -- valid -- Pirmad Cat Snake
  Boiga drapiezii (H. Boie in F. Boie, 1827) -- valid -- Drapiez's Cat Snake, White-spotted Cat Snake
  Boiga flaviviridis Vogel and Ganesh, 2013 -- valid
  Boiga forsteni (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Forsten's Cat Snake
  Boiga gokool (Gray, 1835) -- valid -- Arrowback Tree Snake
  Boiga guangxiensis Wen, 1998 -- valid
  Boiga hoeseli Ramadhan, Iskandar and Subasri, 2010 -- valid -- Lesser Sundas Cat Snake
  Boiga irregularis (Bechstein, 1802) -- valid -- Brown Cat Snake, Brown Tree Snake, Brown Treesnake
  Boiga jaspidea (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Jasper Cat Snake
  Boiga kraepelini Stejneger, 1902 -- valid -- Kelung Cat Snake
  Boiga multifasciata (Blyth, 1861) -- valid -- Many-banded Tree Snake
  Boiga multomaculata (F. Boie, 1827) -- valid -- Many-spotted Cat Snake
  Boiga nigriceps (Günther, 1863) -- valid -- Black-headed Cat Snake
  Boiga nigriceps brevicauda M. A. Smith, 1926 -- valid
  Boiga nigriceps nigriceps (Günther, 1863) -- valid
  Boiga nuchalis (Günther, 1875) -- valid -- Collared Cat Snake, Collared Catsnake
  Boiga ochracea (Theobald, 1868) -- valid -- Tawny Cat Snake
  Boiga ochracea ochracea (Theobald, 1868) -- valid
  Boiga ochracea stoliczkae (Wall, 1909) -- valid
  Boiga ochracea walli M. A. Smith, 1943 -- valid
  Boiga philippina (Peters, 1867) -- valid -- Philippine Cat Snake
  Boiga quincunciata (Wall, 1908) -- valid
  Boiga saengsomi Nutaphand, 1985 -- valid -- Banded Cat Snake
  Boiga schultzei Taylor, 1923 -- valid -- Schultz's Blunt-headed Tree Snake
  Boiga siamensis Nutaphand, 1971 -- valid -- Eyed Cat Snake, Gray Cat Snake
  Boiga tanahjampeana Orlov and Ryabov, 2002 -- valid -- Tanahjampea Cat Snake
  Boiga trigonata (Schneider, 1802) -- valid -- Common Cat Snake, Indian Gamma Snake
  Boiga trigonata melanocephala (Annandale, 1904) -- valid
  Boiga trigonata trigonata (Schneider, 1802) -- valid
  Boiga wallachi Das, 1998 -- valid -- Nicobar Cat Snake
  Boiruna maculata (Boulenger, 1896) -- valid -- Mussurana
  Boiruna sertaneja Zaher, 1996 -- valid
  Borikenophis portoricensis (Reinhardt and Lütken, 1862) -- valid -- Puerto Rican Racer
  Borikenophis portoricensis anegadae (Barbour, 1917) -- valid
  Borikenophis portoricensis aphantus (Schwartz, 1966) -- valid
  Borikenophis portoricensis nicholsi (Grant, 1937) -- valid
  Borikenophis portoricensis portoricensis (Reinhardt and Lütken, 1862) -- valid
  Borikenophis portoricensis prymnus (Schwartz, 1966) -- valid
  Borikenophis portoricensis richardi (Grant, 1946) -- valid
  Borikenophis sancticrucis (Cope, 1862) -- valid -- St. Croix Racer
  Borikenophis variegatus (Schmidt, 1926) -- valid -- Puerto Rican Racer
  Bothriechis aurifer (Salvin, 1860) -- valid -- Nauyaca-de árbol manchas amarillas, Yellow-blotched Palm Pit Viper
  Bothriechis bicolor (Bocourt, 1868) -- valid -- Guatemala Palm Pit Viper, Nauyaca-de árbol bicolor
  Bothriechis guifarroi Townsend, Medina-Flores, Wilson, Jadin and Austin, 2013 -- valid
  Bothriechis lateralis Peters, 1862 -- valid -- Coffee Palm Viper
  Bothriechis marchi (Barbour and Loveridge, 1929) -- valid -- March's Palm Pit Viper
  Bothriechis nigroviridis Peters, 1859 -- valid -- Black-speckled Palm Pit Viper
  Bothriechis rowleyi (Bogert, 1968) -- valid -- Nauyaca-de árbol de Rowley, Rowley's Palm Pit Viper
  Bothriechis schlegelii (Berthold, 1846) -- valid -- Eyelash Viper
  Bothriechis supraciliaris (Taylor, 1954) -- valid -- Blotched Palm-pitviper
  Bothriechis thalassinus Campbell and H. M. Smith, 2000 -- valid
  Bothriopsis chloromelas (Boulenger, 1912) -- invalid
  Bothrocophias andianus (Amaral, 1923) -- valid -- Andean Lancehead
  Bothrocophias campbelli (Freire-Lascano, 1991) -- valid
  Bothrocophias colombianus (Rendahl and Vestergren, 1940) -- valid -- Colombian Lancehead, Munchique's Rufous Lancehead
  Bothrocophias hyoprora (Amaral, 1935) -- valid -- Hognose Lancehead
  Bothrocophias microphthalmus (Cope, 1875) -- valid
  Bothrocophias myersi Gutberlet and Campbell, 2001 -- valid
  Bothrolycus ater Günther, 1874 -- valid -- Günther's Black Snake
  Bothrophthalmus brunneus Günther, 1863 -- valid
  Bothrophthalmus lineatus (Peters, 1863) -- valid -- Red-black Striped Snake
  Bothrops alcatraz Marques, Martins and Sazima, 2002 -- valid -- Alcatrazes Lancehead
  Bothrops alternatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Urutu
  Bothrops ammodytoides Leybold, 1873 -- valid -- Yararanata
  Bothrops asper (Garman, 1883) -- valid -- Nauyaca-terciopelo real, Terciopelo, Terciopelo
  Bothrops atrox (Linnaeus, 1758) -- valid -- Barba Amarilla, Common Lancehead, Fer-de-Lance
  Bothrops ayerbei Folleco-Fernandez, 2010 -- valid -- Ayerbe's Lancehead
  Bothrops barnetti Parker, 1938 -- valid -- Barnett's Lancehead
  Bothrops bilineatus smaragdinus Hoge, 1966 -- valid
  Bothrops brazili Hoge, 1954 -- valid -- Brazil's Lancehead
  Bothrops caribbaeus (Garman, 1887) -- valid -- Saint Lucia Viper
  Bothrops cotiara (Gomes, 1913) -- valid
  Bothrops diporus Cope, 1862 -- valid
  Bothrops erythromelas Amaral, 1923 -- valid -- Caatinga Lancehead
  Bothrops fonsecai Hoge and Belluomini, 1959 -- valid -- Fonseca's Lancehead
  Bothrops insularis (Amaral, 1921) -- valid -- Golden Lancehead
  Bothrops isabelae Sandner-Montilla, 1979 -- invalid
  Bothrops itapetiningae (Boulenger, 1907) -- valid -- Sao Paulo Lancehead
  Bothrops jararaca (Wied-Neuwied, 1824) -- valid
  Bothrops jararacussu Lacerda, 1884 -- valid
  Bothrops jonathani Harvey, 1994 -- valid -- Jonathan's Lancehead
  Bothrops lanceolatus (Bonnaterre, 1790) -- valid -- Martinique Lancehead
  Bothrops leucurus Wagler, 1824 -- valid -- Whitetail Lancehead
  Bothrops lojanus Parker, 1930 -- valid -- Lojan Lancehead
  Bothrops lutzi (Miranda-Ribeiro, 1915) -- valid
  Bothrops marajoensis Hoge, 1966 -- valid -- Marajó Lancehead
  Bothrops marmoratus da Silva and Rodrigues, 2008 -- valid -- Marbled lancehead
  Bothrops matogrossensis Amaral, 1925 -- valid
  Bothrops moojeni Hoge, 1966 -- valid -- Brazilian Lancehead
  Bothrops muriciensis Ferrarezzi and Freire, 2001 -- valid
  Bothrops neuwiedi Wagler, 1824 -- valid -- Jararaca Pintada
  Bothrops oligolepis (Werner, 1901) -- valid -- Inca Forest Pit Viper
  Bothrops osbornei Freire-Lascano, 1991 -- valid
  Bothrops otavioi Barbo, Grazziotin, Sazima, Martins and Sawaya, 2012 -- valid
  Bothrops pauloensis Amaral, 1925 -- valid
  Bothrops pictus (Tschudi, 1845) -- valid -- Desert Lancehead
  Bothrops pirajai Amaral, 1923 -- valid -- Piraja's Lancehead
  Bothrops pubescens (Cope, 1870) -- valid
  Bothrops punctatus (Garcia, 1896) -- valid -- Chocoan Forest Pit Viper, Golden Lancehead
  Bothrops rhombeatus Garcia, 1896 -- valid -- Cat Lancehead, Cauca Valley Yellow Lancehead
  Bothrops sanctaecrucis Hoge, 1966 -- valid -- Bolivian Lancehead
  Bothrops venezuelensis Sandner-Montilla, 1952 -- valid
  Brachyophis revoili Mocquard, 1888 -- valid -- Revoil's Short Snake
  Brachyophis revoili cornii Scortecci, 1932 -- valid
  Brachyophis revoili krameri Lanza, 1966 -- valid
  Brachyophis revoili revoili Mocquard, 1888 -- valid
  Brygophis coulangesi (Domergue, 1988) -- valid
  Buhoma depressiceps (Werner, 1897) -- valid -- Pale-headed Forest Snake
  Buhoma depressiceps depressiceps (Werner, 1897) -- valid
  Buhoma depressiceps marlieri (Laurent, 1956) -- valid
  Buhoma procterae (Loveridge, 1922) -- valid -- Uluguru Forest Snake
  Buhoma vauerocegae (Tornier, 1902) -- valid -- Usambara Forest Snake
  Caaeteboia amarali (Wettstein, 1930) -- valid -- Amaral's Ground Snake
  Calabaria reinhardtii (Schlegel, 1848) -- valid
  Calamaria abramovi Orlov, 2009 -- valid
  Calamaria abstrusa Inger and Marx, 1965 -- valid
  Calamaria acutirostris Boulenger, 1896 -- valid -- Pointed Snout Reed Snake
  Calamaria albiventer (Gray, 1835) -- valid -- White-bellied Reed Snake
  Calamaria alidae Boulenger, 1920 -- valid
  Calamaria apraeocularis M. A. Smith, 1927 -- valid -- Apreocular Reed Snake
  Calamaria banggaiensis Koch, Arida, McGuire, Iskandar and Böhme, 2009 -- valid -- Banggai Reed Snake
  Calamaria battersbyi Inger and Marx, 1965 -- valid
  Calamaria bicolor A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Two-colored Dwarf Snake
  Calamaria bitorques Peters, 1872 -- valid -- Luzon Dwarf Snake
  Calamaria boesemani Inger and Marx, 1965 -- valid -- Boeseman's Reed Snake
  Calamaria borneensis Bleeker, 1860 -- valid
  Calamaria brongersmai Inger and Marx, 1965 -- valid -- Brongersma's Reed Snake
  Calamaria buchi Marx and Inger, 1955 -- valid -- Dalat Dwarf Snake
  Calamaria butonensis Howard and Gillespie, 2007 -- valid
  Calamaria ceramensis de Rooij, 1913 -- valid
  Calamaria concolor Orlov, Truong Quang Nguyen, Tao Thien Nguyen, Ananjeva and Cuc Thu Ho, 2010 -- valid
  Calamaria crassa Lidth de Jeude, 1922 -- valid
  Calamaria curta Boulenger, 1896 -- valid -- Dark-bellied Reed Snake
  Calamaria doederleini Gough, 1902 -- valid
  Calamaria eiselti Inger and Marx, 1965 -- valid
  Calamaria everetti Boulenger, 1893 -- valid
  Calamaria forcarti Inger and Marx, 1965 -- valid
  Calamaria gervaisii A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Gervais' Reed Snake, Philippine Dwarf Snake
  Calamaria gialaiensis Ziegler, Nguyen Van Sang and Nguyen Quang Truong, 2009 -- valid -- Gia Lai Reed Snake, Gia LaiReed Snake
  Calamaria grabowskyi Fischer, 1885 -- valid
  Calamaria gracillima (Günther, 1872) -- valid
  Calamaria griswoldi Loveridge, 1938 -- valid
  Calamaria hilleniusi Inger and Marx, 1965 -- valid
  Calamaria ingeri Grismer, Kaiser and Yaakob, 2004 -- valid
  Calamaria javanica Boulenger, 1891 -- valid
  Calamaria javanica javanica Boulenger, 1891 -- valid
  Calamaria javanica lineata Brongersma, 1928 -- valid
  Calamaria joloensis Taylor, 1922 -- valid -- Jolo Worm Snake
  Calamaria lateralis Mocquard, 1890 -- valid
  Calamaria lautensis de Rooij, 1917 -- valid
  Calamaria leucogaster Bleeker, 1860 -- valid -- Ampat Lawang Dwarf Snake
  Calamaria linnaei H. Boie in F. Boie, 1827 -- valid -- Linne's Dwarf Snake
  Calamaria longirostris Howard and Gillespie, 2007 -- valid
  Calamaria lovii Boulenger, 1887 -- valid -- Lovi's Reed Snake
  Calamaria lovii gimletti Boulenger, 1905 -- valid
  Calamaria lovii ingermarxorum Darevsky and Orlov, 1992 -- valid
  Calamaria lovii lovii Boulenger, 1887 -- valid
  Calamaria lovii wermuthi Inger and Marx, 1965 -- valid
  Calamaria lumbricoidea H. Boie in F. Boie, 1827 -- valid -- Variable Reed Snake
  Calamaria lumholtzi Andersson, 1923 -- valid
  Calamaria margaritophora Bleeker, 1860 -- valid -- Bleeker's Dwarf Snake
  Calamaria mecheli Schenkel, 1901 -- valid
  Calamaria melanota Jan, 1862 -- valid
  Calamaria modesta A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Calamaria monticola Cantor, 1839 -- invalid
  Calamaria muelleri Boulenger, 1896 -- valid -- Mueller's Reed Snake
  Calamaria nuchalis Boulenger, 1896 -- valid -- Narrow-headed Reed Snake
  Calamaria obscurostriata Blyth, 1854 -- invalid
  Calamaria palawanensis Inger and Marx, 1965 -- valid -- Palawan Worm Snake
  Calamaria pavimentata A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Collared Reed Snake
  Calamaria pavimentata miyarai Takara, 1962 -- valid
  Calamaria pavimentata pavimentata A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Calamaria pfefferi Stejneger, 1901 -- valid -- Pfeffer's Reed Snake
  Calamaria prakkei Lidth de Jeude, 1893 -- valid -- Prakke's Reed Snake
  Calamaria rebentischi Bleeker, 1860 -- valid
  Calamaria reticulata Blyth, 1854 -- invalid
  Calamaria sangi Nguyen Quang Truong, Koch and Ziegler, 2009 -- valid -- Sang's Reed Snake
  Calamaria schlegeli A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Pink-headed Reed Snake, White-headed Reed Snake
  Calamaria schlegeli cuvieri Jan, 1862 -- valid
  Calamaria schlegeli schlegeli A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Calamaria schmidti Marx and Inger, 1955 -- valid -- Schmidt's Reed Snake
  Calamaria septentrionalis Boulenger, 1890 -- valid -- Hong Kong Dwarf Snake
  Calamaria suluensis Taylor, 1922 -- valid
  Calamaria sumatrana Edeling, 1870 -- valid -- Sumatra Dwarf Snake
  Calamaria thanhi Ziegler and Quyet, 2005 -- valid -- Thanh's Reed Snake
  Calamaria ulmeri Sackett, 1940 -- valid
  Calamaria virgulata H. Boie in F. Boie, 1827 -- valid -- Boie's Dwarf Snake
  Calamaria yunnanensis Chernov, 1962 -- valid
  Calamodontophis paucidens (Amaral, 1936) -- valid -- Tropical Forest Snake
  Calamodontophis ronaldoi Franco, de Carvalho Cintra and de Lema, 2006 -- valid
  Calamohydrus andersonii Boulenger, 1888 -- invalid
  Calamorhabdium acuticeps Ahl, 1933 -- valid -- Sulawesi Iridescent Snake
  Calamorhabdium kuekenthali Boettger, 1898 -- valid -- Batjan Iridescent Snake
  Calloselasma rhodostoma (Kuhl, 1824) -- valid -- Malayan Pit Viper
  Calloselasma rhodostoma annamensis (Angel, 1933) -- valid
  Calloselasma rhodostoma rhodostoma (Kuhl, 1824) -- valid
  Candoia aspera (Günther, 1877) -- valid
  Candoia aspera aspera (Günther, 1877) -- valid
  Candoia aspera schmidti (Stull, 1932) -- valid
  Candoia bibroni (Duméril and Bibron, 1844) -- valid -- Bibron's Bevel-nosed Boa, Bibron's Keel-scaled Boa, Pacific Tree Boa
  Candoia bibroni australis (Montrouzier, 1860) -- valid
  Candoia bibroni bibroni (Duméril and Bibron, 1844) -- valid
  Candoia carinata (Schneider, 1801) -- valid -- Pacific Ground Boa, Pacific Keel-scaled Boa
  Candoia carinata carinata (Schneider, 1801) -- valid
  Candoia carinata tepedeleni Smith, Chiszar, Tepedelen and van Breukelen, 2001 -- valid
  Candoia paulsoni (Stull, 1956) -- valid
  Candoia paulsoni mcdowelli Smith and Chiszar, 2001 -- valid
  Candoia paulsoni paulsoni (Stull, 1956) -- valid
  Candoia paulsoni rosadoi Smith and Chiszar, 2001 -- valid
  Candoia paulsoni sadlieri Smith and Chiszar, 2001 -- valid
  Candoia paulsoni tasmai Smith and Tepedelen, 2001 -- valid
  Candoia paulsoni vindumi Smith and Chiszar, 2001 -- valid
  Candoia superciliosa (Günther, 1863) -- valid -- Palau Bevel-nosed Boa
  Candoia superciliosa crombiei Smith, Chiszar, Tepedelen and van Breukelen, 2001 -- valid
  Candoia superciliosa superciliosa (Günther, 1863) -- valid
  Caraiba andreae (Reinhardt and Lütken, 1862) -- valid -- Black and White Racer
  Caraiba andreae andreae (Reinhardt and Lütken, 1862) -- valid
  Caraiba andreae melopyrrha (Thomas and Garrido, 1967) -- valid
  Caraiba andreae morenoi (Garrido, 1973) -- valid
  Caraiba andreae nebulatus (Barbour, 1916) -- valid
  Caraiba andreae orientalis (Barbour And Ramsden, 1919) -- valid
  Caraiba andreae peninsulae (Schwartz and Thomas, 1960) -- valid
  Carphophis amoenus (Say, 1825) -- valid -- Eastern Worm Snake, Eastern Wormsnake
  Carphophis amoenus amoenus (Say, 1825) -- valid -- Eastern Worm Snake
  Carphophis amoenus helenae (Kennicott, 1859) -- valid -- Midwest Worm Snake
  Carphophis vermis (Kennicott, 1859) -- valid -- Western Worm Snake, Western Wormsnake
  Causus bilineatus Boulenger, 1905 -- valid -- Two-lined Night Adder, Two-Striped Night Adder
  Causus defilippii (Jan, 1863) -- valid -- Snouted Night Adder
  Causus lichtensteinii (Jan, 1859) -- valid -- Forest Night Adder
  Causus maculatus (Hallowell, 1842) -- valid -- Spotted Night Adder, West-African Night Adder
  Causus resimus (Peters, 1862) -- valid -- Green Night Adder
  Causus rhombeatus (Lichtenstein, 1823) -- valid -- Common Night Adder, Rhombic Night Adder
  Cemophora coccinea (Blumenbach, 1788) -- valid -- Scarlet Snake
  Cemophora coccinea coccinea (Blumenbach, 1788) -- valid -- Florida Scarlet Snake
  Cemophora coccinea copei Jan, 1863 -- valid -- Northern Scarlet Snake
  Cemophora coccinea lineri Williams, Brown and Wilson, 1966 -- valid -- Texas Scarlet Snake
  Cerastes boehmei Wagner and Wilms, 2010 -- valid
  Cerastes cerastes (Linnaeus, 1758) -- valid -- Desert Horned Viper
  Cerastes cerastes cerastes (Linnaeus, 1758) -- valid
  Cerastes cerastes hoofieni Werner, Sivan, Kushnir and Motro in Joger, 1999 -- valid
  Cerastes gasperettii Leviton and Anderson, 1967 -- valid
  Cerastes gasperettii gasperettii Leviton and Anderson, 1967 -- valid
  Cerastes gasperettii mendelssohni Werner, Sivan, Kushnir and Motro in Joger, 1999 -- valid
  Cerastes vipera (Linnaeus, 1758) -- valid -- Sahara Sand Viper
  Cercophis auratus (Schlegel, 1837) -- valid -- Schlegel's Golden Snake
  Cerrophidion godmani (Günther, 1863) -- valid -- Godman's Montane Pit Viper, Nauyaca-de montaña de Godman
  Cerrophidion petlalcalensis Lopéz-Luna, Vogt and Torre-Loranca, 1999 -- valid
  Cerrophidion sasai Jadin, Townsend, Castoe and Campbell, 2012 -- valid -- Costa Rica Montane Pitviper
  Cerrophidion tzotzilorum (Campbell, 1985) -- valid -- Nauyaca-de montaña tzotzil, Tzotzil Montane Pit Viper
  Cerrophidion wilsoni Jadin, Townsend, Castoe and Campbell, 2012 -- valid -- Honduras Montane Pitviper
  Chamaelycus christyi Boulenger, 1919 -- valid -- Christy's Banded Snake
  Chamaelycus fasciatus (Günther, 1858) -- valid -- African Banded Snake
  Chamaelycus parkeri (Angel, 1934) -- valid -- Parker's Banded Snake
  Chamaelycus werneri (Mocquard, 1902) -- valid
  Chapinophis xanthocheilus Campbell and E. N. Smith, 1998 -- valid
  Charina bottae (Blainville, 1835) -- valid -- Rubber Boa
  Charina umbratica Klauber, 1943 -- valid -- Southern Rubber Boa
  Chersodromus liebmanni Reinhardt, 1861 -- valid -- Culebra-corredora de Liebmann, Liebmann's Earth Runner
  Chersodromus rubriventris (Taylor, 1949) -- valid -- Culebra-corredora vientre rojo, Redbelly Earth Runner
  Chilabothrus angulifer (Bibron, 1840) -- valid -- Cuban Boa
  Chilabothrus chrysogaster (Cope, 1871) -- valid -- Southern Bahamas Boa
  Chilabothrus chrysogaster chrysogaster (Cope, 1871) -- valid
  Chilabothrus chrysogaster relicquus (Barbour and Shreve, 1935) -- valid
  Chilabothrus chrysogaster schwartzi (Buden, 1975) -- valid -- Crooked-Acklins Boa
  Chilabothrus exsul (Netting and Goin, 1944) -- valid -- Northern Bahamas Boa
  Chilabothrus fordii (Günther, 1861) -- valid
  Chilabothrus fordii agametus (Sheplan and Schwartz, 1974) -- valid
  Chilabothrus fordii fordii (Günther, 1861) -- valid
  Chilabothrus fordii manototus (Schwartz, 1979) -- valid
  Chilabothrus gracilis Fischer, 1888 -- valid
  Chilabothrus gracilis gracilis Fischer, 1888 -- valid
  Chilabothrus gracilis hapalus (Sheplan and Schwartz, 1974) -- valid
  Chilabothrus inornatus (Reinhardt, 1843) -- valid -- Puerto Rican Boa
  Chilabothrus monensis (Zenneck, 1898) -- valid -- Mona Boa
  Chilabothrus monensis granti (Stull, 1933) -- invalid -- Virgin Island Tree Boa
  Chilabothrus monensis monensis (Zenneck, 1898) -- invalid -- Mona Boa
  Chilabothrus striatus (Fischer, 1856) -- valid -- Hispaniolan Boa
  Chilabothrus striatus exagistus (Sheplan and Schwartz, 1974) -- valid
  Chilabothrus striatus striatus (Fischer, 1856) -- valid
  Chilabothrus striatus warreni (Sheplan and Schwartz, 1974) -- valid
  Chilabothrus strigilatus (Cope, 1862) -- valid -- Bahamas Boa
  Chilabothrus strigilatus ailurus (Sheplan and Schwartz, 1974) -- valid
  Chilabothrus strigilatus fosteri (Barbour, 1941) -- valid
  Chilabothrus strigilatus fowleri (Sheplan and Schwartz, 1974) -- valid
  Chilabothrus strigilatus mccraniei (Sheplan and Schwartz, 1974) -- valid
  Chilabothrus strigilatus strigilatus (Cope, 1862) -- valid
  Chilabothrus subflavus (Stejneger, 1901) -- valid -- Jamaican Boa
  Chilomeniscus savagei Cliff, 1954 -- valid -- Culebra-arenera de Cerralvo, Savage's Sand Snake
  Chilomeniscus stramineus Cope, 1860 -- valid -- Culebra-arenera manchada, Variable Sandsnake
  Chilomeniscus stramineus esterensis Hoard, 1939 -- valid
  Chilomeniscus stramineus stramineus Cope, 1860 -- valid
  Chilopoma rufipunctatum Cope, 1875 -- invalid
  Chilorhinophis butleri Werner, 1907 -- valid -- Butler's Two-headed Snake
  Chilorhinophis carpenteri (Parker, 1927) -- invalid
  Chilorhinophis carpenteri carpenteri (Parker, 1927) -- invalid
  Chilorhinophis carpenteri liwalensis Loveridge, 1951 -- invalid
  Chilorhinophis gerardi (Boulenger, 1913) -- valid -- Congo Two-headed Snake, Gerard's Black and Yellow Burrowing Snake
  Chilorhinophis gerardi gerardi (Boulenger, 1913) -- valid
  Chilorhinophis gerardi tanganyikae Loveridge, 1951 -- valid -- Western Tanganyika Two-headed Snake
  Chionactis occipitalis (Hallowell, 1854) -- valid -- Culebra-nariz de pala del oeste, Mojave Shovelnose Snake, Western Shovel-nosed Snake, Western Shovelnose Snake
  Chionactis occipitalis annulata (Baird, 1859) -- invalid
  Chionactis occipitalis klauberi (Stickel, 1941) -- invalid -- Tucson Shovel-nosed Snake
  Chionactis occipitalis occipitalis (Hallowell, 1854) -- invalid -- Mojave Shovelnose Snake
  Chionactis occipitalis talpina Klauber, 1951 -- invalid -- Nevada Shovelnose Snake
  Chionactis palarostris (Klauber, 1937) -- valid -- Culebra-nariz de pala sonorense, Sonoran Shovel-nosed Snake, Sonoran Shovelnose Snake
  Chionactis palarostris organica Klauber, 1951 -- valid -- Organ Pipe Shovelnose Snake
  Chionactis palarostris palarostris (Klauber, 1937) -- valid -- Sonoran Shovelnose Snake
  Chironius bicarinatus (Wied-Neuwied, 1820) -- valid -- Two-headed Sipo
  Chironius carinatus (Linnaeus, 1758) -- valid -- Sipo
  Chironius carinatus flavopictus (Werner, 1909) -- invalid
  Chironius carinatus spixii (Hallowell, 1845) -- invalid
  Chironius challenger Kok, 2010 -- valid
  Chironius exoletus (Linnaeus, 1758) -- valid -- Linnaeus' Sipo
  Chironius flavolineatus (Jan, 1863) -- valid -- Boettger's Sipo
  Chironius foveatus Bailey, 1955 -- valid -- South American Sipo
  Chironius fuscus (Linnaeus, 1758) -- valid -- Brown Sipo
  Chironius fuscus leucometapus Dixon, Wiest and Cei, 1993 -- invalid
  Chironius grandisquamis (Peters, 1869) -- valid -- Ecuador Sipo
  Chironius laevicollis (Wied-Neuwied, 1824) -- valid -- Brazilian Sipo
  Chironius laurenti Dixon, Wiest and Cei, 1993 -- valid
  Chironius monticola Roze, 1952 -- valid -- Mountain Sipo
  Chironius multiventris K. P. Schmidt and Walker, 1943 -- valid -- South American Sipo
  Chironius quadricarinatus (F. Boie, 1827) -- valid -- Central Sipo
  Chironius quadricarinatus maculoventris Dixon, Wiest and Cei, 1993 -- invalid
  Chironius scurrulus (Wagler, 1824) -- valid -- Wagler's Sipo
  Chironius septentrionalis Dixon, Wiest and Cei, 1993 -- valid -- South American Sipo
  Chironius vincenti (Boulenger, 1891) -- valid -- Saint Vincent Racer
  Chrysopelea ornata (Shaw, 1802) -- valid -- Golden Flying Snake
  Chrysopelea ornata ornata (Shaw, 1802) -- valid
  Chrysopelea ornata ornatissima Werner, 1925 -- valid -- Golden Tree Snake
  Chrysopelea ornata sinhaleya Deraniyagala, 1945 -- valid
  Chrysopelea paradisi H. Boie in F. Boie, 1827 -- valid -- Paradise Flying Snake, Paradise Tree Snake
  Chrysopelea paradisi celebensis Mertens, 1968 -- valid
  Chrysopelea paradisi paradisi H. Boie in F. Boie, 1827 -- valid
  Chrysopelea paradisi variabilis Mertens, 1968 -- valid
  Chrysopelea pelias (Linnaeus, 1758) -- valid -- Banded Flying Snake, Twin-barred Tree Snake
  Chrysopelea rhodopleuron F. Boie, 1827 -- valid -- Moluccan Flying Snake
  Chrysopelea rhodopleuron rhodopleuron F. Boie, 1827 -- valid
  Chrysopelea rhodopleuron viridis Fischer, 1880 -- valid
  Chrysopelea taprobanica M. A. Smith, 1943 -- valid -- Indian Flying Snake
  Clelia clelia (Daudin, 1803) -- valid -- Culebra-viborera común
  Clelia clelia clelia (Daudin, 1803) -- valid
  Clelia clelia groomei Greer, 1965 -- valid
  Clelia clelia immaculata H. M. Smith, 1942 -- invalid
  Clelia equatoriana (Amaral, 1924) -- valid -- Equatorial Mussurana
  Clelia errabunda Underwood, 1993 -- valid -- Underwood's Mussurana
  Clelia hussami Morato, Franco and Sanches, 2003 -- valid
  Clelia langeri Reichle and Embert, 2005 -- valid
  Clelia plumbea (Wied-Neuwied, 1820) -- valid
  Clelia scytalina (Cope, 1867) -- valid -- Culebra-viborera mexicana, Mexican Snake Eater
  Clonophis Cope, 1889 -- valid -- Kirtland's Snakes
  Clonophis kirtlandii (Kennicott, 1856) -- valid -- Kirtland's Snake
  Coelognathus erythrurus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Reddish Rat Snake
  Coelognathus erythrurus celebensis (Jan, 1863) -- valid
  Coelognathus erythrurus erythrurus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Coelognathus erythrurus manillensis Jan, 1863 -- valid
  Coelognathus erythrurus psephenourus (Leviton, 1979) -- valid
  Coelognathus flavolineatus (Schlegel, 1837) -- valid -- Black Copper Rat Snake, Yellow Striped Snake
  Coelognathus helena (Daudin, 1803) -- valid -- Trinket Snake
  Coelognathus helena helena (Daudin, 1803) -- valid
  Coelognathus helena monticollaris (Schulz, 1992) -- valid
  Coelognathus radiatus (F. Boie, 1827) -- valid -- Copper-headed Trinket Snake, Copperhead Rat Snake, Radiated Ratsnake
  Coelognathus subradiatus (Schlegel, 1837) -- valid -- Sunda Rat Snake
  Collorhabdium williamsoni Smedley, 1932 -- valid -- Mountain Dwarf Snake, Williamson's Reed Snake
  Coluber anthonyi (Stejneger, 1901) -- valid -- Clarion Island Whip Snake, Culebra-chirriadora de Isla Clarion
  Coluber aurigulus (Cope, 1861) -- valid -- Baja California Striped Whip Snake, Culebra-chirriadora de Baja California
  Coluber aurigulus barbouri Van Denburgh and Slevin, 1921 -- invalid
  Coluber bholanathi Sharma, 1976 -- invalid
  Coluber bilineatus (Jan, 1863) -- valid -- Culebra-chirriadora sonorense, Sonoran Whipsnake
  Coluber bilineatus slevini (Lowe and Norris, 1955) -- invalid
  Coluber constrictor Linnaeus, 1758 -- valid -- Culebra-corredora constrictor, Eastern Racer, Racer
  Coluber constrictor anthicus (Cope, 1862) -- valid -- Buttermilk Racer, Buttermilk Snake
  Coluber constrictor constrictor Linnaeus, 1758 -- valid -- Northern Black Racer
  Coluber constrictor etheridgei Wilson, 1970 -- valid -- Tan Racer
  Coluber constrictor flaviventris Say in James, 1823 -- valid -- Eastern Yellowbelly Racer, Yellowbelly Racer
  Coluber constrictor foxii (Baird and Girard, 1853) -- valid -- Blue Racer
  Coluber constrictor helvigularis Auffenberg, 1955 -- valid -- Brown Chin Racer
  Coluber constrictor latrunculus Wilson, 1970 -- valid -- Black-masked Racer, Blackmask Racer
  Coluber constrictor mormon Baird and Girard, 1852 -- valid -- Western Yellow-bellied Racer
  Coluber constrictor oaxaca (Jan, 1863) -- valid -- Mexican Racer
  Coluber constrictor paludicola Auffenberg and Babitt, 1953 -- valid -- Everglades Racer
  Coluber constrictor priapus Dunn and Wood, 1939 -- valid -- Southern Black Racer
  Coluber eques Reuss, 1834 -- invalid
  Coluber flagellum Shaw, 1802 -- valid -- Coachwhip, Culebra-chirriadora común
  Coluber flagellum cingulum (Lowe and Woodin, 1954) -- valid -- Sonoran Coachwhip
  Coluber flagellum flagellum Shaw, 1802 -- valid -- Eastern Coachwhip
  Coluber flagellum lineatulus (H. M. Smith, 1941) -- valid -- Lined Coachwhip
  Coluber flagellum piceus (Cope, 1892) -- valid -- Red Coachwhip
  Coluber flagellum ruddocki (Brattstrom and Warren, 1953) -- valid -- San Joaquin Coachwhip
  Coluber flagellum testaceus Say in James, 1823 -- valid -- Western Coachwhip
  Coluber fuliginosus (Cope, 1895) -- valid -- Baja California Coachwhip
  Coluber helveticus Lacépède, 1789 -- invalid
  Coluber insulanus Mertens, 1965 -- invalid
  Coluber lateralis (Hallowell, 1853) -- valid -- Culebra-chirriadora rayada, Striped Racer
  Coluber lateralis euryxanthus (Riemer, 1954) -- valid -- Alameda Striped Racer
  Coluber lateralis lateralis (Hallowell, 1853) -- valid -- California Striped Racer
  Coluber manseri Leviton, 1986 -- invalid
  Coluber maurus Linnaeus, 1758 -- invalid
  Coluber mentovarius (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-chirriadora neotropical, Neotropical Whip Snake
  Coluber mentovarius centralis Roze, 1953 -- valid
  Coluber mentovarius mentovarius (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Coluber mentovarius striolatus Mertens, 1934 -- valid
  Coluber mentovarius suborbitalis (Peters, 1869) -- valid
  Coluber mentovarius variolosus (H. M. Smith, 1943) -- valid
  Coluber natrix Linnaeus, 1758 -- invalid
  Coluber persa Pallas, 1814 -- invalid
  Coluber proximus Say in James, 1823 -- invalid
  Coluber saurita Linnaeus, 1766 -- invalid
  Coluber schistosus Daudin, 1803 -- invalid
  Coluber schotti (Baird and Girard, 1853) -- valid -- Schott's Whipsnake
  Coluber schotti ruthveni (Ortenburger, 1923) -- valid -- Ruthven's Whipsnake
  Coluber schotti schotti (Baird and Girard, 1853) -- valid -- Schott's Whipsnake
  Coluber scortecci Lanza, 1963 -- invalid
  Coluber scutatus Pallas, 1771 -- invalid
  Coluber siculus Cuvier, 1829 -- invalid
  Coluber sinai (Schmidt and Marx, 1956) -- invalid
  Coluber stolatus Linnaeus, 1758 -- invalid
  Coluber striatulus Linnaeus, 1766 -- invalid
  Coluber taeniatus (Hallowell, 1852) -- valid -- Culebra-chirriadora adornada, Striped Whipsnake
  Coluber taeniatus girardi Stejneger and Barbour, 1917 -- valid -- Central Texas Whipsnake
  Coluber taeniatus taeniatus (Hallowell, 1852) -- valid -- Desert Striped Whipsnake
  Coluber taxispilotus Holbrook, 1838 -- invalid
  Coluber taylori Parker, 1949 -- invalid
  Coluber thomasi Parker, 1931 -- invalid
  Coluber vittacaudatus Blyth, 1854 -- invalid
  Coluber vittatus Linnaeus, 1758 -- invalid
  Coluber zebrinus Broadley and Schätti, 2000 -- invalid
  Colubridae Oppel, 1811 -- valid -- Colubrids, Typical Snakes
  Colubroelaps nguyenvansangi Orlov, Kharin, Ananjeva, T. T. Nguyen and Q. T. Nguyen, 2009 -- valid -- Nguyenvansang's Snake
  Compsophis albiventris Mocquard, 1894 -- valid -- Madagascar Bighead Snake
  Compsophis boulengeri (Peracca, 1892) -- valid -- Boulenger's Forest Snake
  Compsophis fatsibe (Mercurio and Andreone, 2005) -- valid
  Compsophis infralineatus (Günther, 1882) -- valid -- Lined Forest Snake
  Compsophis laphystius (Cadle, 1996) -- valid
  Compsophis vinckei (Domergue, 1988) -- valid
  Compsophis zeny (Cadle, 1996) -- valid
  Coniophanes alvarezi Campbell, 1989 -- valid -- Chiapan Stripeless Snake, Culebra sin rayas-chiapaneca
  Coniophanes andresensis Bailey, 1937 -- valid -- San Andres Snake
  Coniophanes bipunctatus (Günther, 1858) -- valid -- Culebra dos puntos, Two-spotted Snake
  Coniophanes bipunctatus bipunctatus (Günther, 1858) -- valid
  Coniophanes bipunctatus biseriatus H. M. Smith, 1940 -- valid
  Coniophanes dromiciformis (Peters, 1863) -- valid -- Peters' Running Snake
  Coniophanes fissidens (Günther, 1858) -- valid -- Culebra vientre amarillo, Yellowbelly Snake
  Coniophanes fissidens convergens Shannon and H. M. Smith, 1950 -- valid
  Coniophanes fissidens dispersus H. M. Smith, 1941 -- valid
  Coniophanes fissidens fissidens (Günther, 1858) -- valid
  Coniophanes fissidens proterops Cope, 1860 -- valid
  Coniophanes fissidens punctigularis Cope, 1860 -- valid
  Coniophanes imperialis (Kennicott in Baird, 1859) -- valid -- Black-striped Snake, Culebra rayas negras, Regal Black-striped Snake
  Coniophanes imperialis clavatus (Peters, 1864) -- valid
  Coniophanes imperialis copei Hartweg and Oliver, 1938 -- valid
  Coniophanes imperialis imperialis (Kennicott in Baird, 1859) -- valid -- Tamaulipan Black-striped Snake
  Coniophanes joanae Myers, 1966 -- valid
  Coniophanes lateritius Cope, 1862 -- valid -- Culebra sin rayas, Stripeless Snake
  Coniophanes longinquus Cadle, 1989 -- valid
  Coniophanes melanocephalus (Peters, 1869) -- valid
  Coniophanes meridanus Schmidt and Andrews, 1936 -- valid -- Culebra sin rayas-peninsular, Peninsula Stripeless Snake
  Coniophanes michoacanensis Flores-Villela and E. N. Smith, 2009 -- valid
  Coniophanes piceivittis Cope, 1869 -- valid -- Cope's Black-striped Snake, Culebra rayada-de Cope
  Coniophanes piceivittis frangivirgatus Peters, 1950 -- valid
  Coniophanes piceivittis piceivittis Cope, 1869 -- valid
  Coniophanes quinquevittatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra rayada-escofinada, Fife-striped Snake
  Coniophanes sarae Ponce-Campos and H. M. Smith, 2001 -- valid
  Coniophanes schmidti Bailey, 1937 -- valid -- Faded Black-striped Snake
  Coniophanes taylori Hall, 1951 -- valid
  Conophis lineatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-guardacaminos lineada, Road Guarder
  Conophis lineatus concolor Cope, 1867 -- valid
  Conophis lineatus dunni H. M. Smith, 1942 -- invalid
  Conophis lineatus lineatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Conophis morai Perez-Higareda, Lopez-Luna and H. M. Smith, 2002 -- valid
  Conophis pulcher Cope, 1869 -- invalid -- Culebra-guardacaminos hermosa
  Conophis vittatus Peters, 1860 -- valid -- Culebra-guardacaminos rayada, Striped Road Guarder
  Conophis vittatus viduus (Cope, 1876) -- invalid
  Conopsis acuta (Cope, 1886) -- valid
  Conopsis amphisticha (H. M. Smith and Laufe, 1945) -- valid -- Culebra-toluqueña manchas gemelas, Twin-spotted Tolucan Ground Snake
  Conopsis biserialis (Taylor and H. M. Smith, 1942) -- valid -- Culebra-terrestre dos líneas, Two-lined Mexican Earth Snake
  Conopsis lineata (Kennicott, 1859) -- valid -- Culebra-toluqueña lineada, Lined Tolucan Earthsnake, Lined Tolucan Ground Snake
  Conopsis megalodon (Taylor and H. M. Smith, 1942) -- valid -- Culebra-toluqueña de San Felipe, San Felipe Ground Snake
  Conopsis nasus Günther, 1858 -- valid -- Culebra-terrestre narigona, Largenose Earth Snake
  Conopsis nasus labialis Tanner, 1961 -- valid
  Conopsis nasus nasus Günther, 1858 -- valid
  Contia longicaudae Feldman and Hoyer, 2010 -- valid -- Forest Sharp-tailed Snake
  Contia tenuis (Baird and Girard, 1852) -- valid -- Sharp-tailed Snake, Sharptail Snake
  Corallus annulatus (Cope, 1875) -- valid
  Corallus batesii (Gray, 1860) -- valid
  Corallus blombergi (Rendahl and Vestergren, 1941) -- valid
  Corallus caninus (Linnaeus, 1758) -- valid
  Corallus cookii Gray, 1842 -- valid -- Cook's Tree Boa, Neotropical Tree Boa
  Corallus cropanii (Hoge, 1953) -- valid
  Corallus grenadensis (Barbour, 1914) -- valid
  Corallus hortulanus (Linnaeus, 1758) -- valid -- Amazon Tree Boa, Common Tree Boa
  Corallus hortulanus enydris (Linnaeus, 1758) -- valid
  Corallus hortulanus hortulanus (Linnaeus, 1758) -- valid
  Corallus ruschenbergerii (Cope, 1876) -- valid
  Coronella austriaca Laurenti, 1768 -- valid -- Smooth Snake
  Coronella austriaca acutirostris Malkmus, 1995 -- valid
  Coronella austriaca austriaca Laurenti, 1768 -- valid
  Coronella brachyura (Günther, 1866) -- valid -- Indian Smooth Snake
  Coronella fuliginoides Günther, 1858 -- invalid
  Coronella girondica (Daudin, 1803) -- valid -- Southern Smooth Snake
  Coronella girondica amaliae (Boettger, 1881) -- valid
  Coronella girondica girondica (Daudin, 1803) -- valid
  Coronella olivacea Peters, 1854 -- invalid
  Coronella tessellata Laurenti, 1768 -- invalid
  Crisantophis nevermanni (Dunn, 1937) -- valid -- Dunn's Road Guarder
  Crotalus adamanteus Palisot de Beauvois, 1799 -- valid -- Eastern Diamond-backed Rattlesnake, Eastern Diamondback Rattlesnake
  Crotalus aquilus Klauber, 1952 -- valid -- Queretaran Dusky Rattlesnake
  Crotalus atrox Baird and Girard, 1853 -- valid -- Víbora-cascabel de diamantes, Western Diamond-backed Rattlesnake, Western Diamondback Rattlesnake
  Crotalus basiliscus (Cope, 1864) -- valid -- Víbora-cascabel de Saye
  Crotalus catalinensis Cliff, 1954 -- valid -- Víbora-cascabel muda
  Crotalus cerastes Hallowell, 1854 -- valid -- Sidewinder, Víbora-cascabel cornuda
  Crotalus cerastes cerastes Hallowell, 1854 -- valid -- Mojave Desert Sidewinder
  Crotalus cerastes cercobombus Savage and Cliff, 1953 -- valid -- Sonoran Desert Sidewinder, Sonoran Sidewinder
  Crotalus cerastes laterorepens Klauber, 1944 -- valid -- Colorado Desert Sidewinder
  Crotalus cerberus (Coues in Wheeler, 1875) -- valid -- Arizona Black Rattlesnake
  Crotalus culminatus Klauber, 1952 -- valid -- Northwestern Neotropical Rattlesnake
  Crotalus durissus Linnaeus, 1758 -- valid -- Cascabel Rattlesnake, Central American Rattlesnake, South American Rattlesnake, Víbora-cascabel tropical
  Crotalus durissus cumanensis Humboldt, 1811 -- valid
  Crotalus durissus durissus Linnaeus, 1758 -- valid
  Crotalus durissus marajoensis Hoge, 1966 -- valid
  Crotalus durissus ruruima Hoge, 1966 -- valid
  Crotalus durissus terrificus (Laurenti, 1768) -- valid
  Crotalus durissus trigonicus Harris and Simmons, 1978 -- valid -- Rupununi Savanna Rattlesnake
  Crotalus durissus unicolor Van Lidth de Jeude, 1887 -- valid -- Aruba Island Rattlesnake
  Crotalus durissus vegrandis Klauber, 1941 -- invalid
  Crotalus enyo (Cope, 1861) -- valid -- Baja California Rattlesnake, Lower California Rattlesnake, Víbora-cascabel bajacaliforniana
  Crotalus enyo cerralvensis Cliff, 1954 -- valid -- Cerralvo Rattlesnake
  Crotalus enyo enyo (Cope, 1861) -- valid -- Baja California Rattlesnake
  Crotalus enyo furvus Lowe and Norris, 1954 -- valid -- Rosario Rattlesnake
  Crotalus ericsmithi Campbell and Flores-Villela, 2008 -- valid -- Guerreran Long-tailed Rattlesnake
  Crotalus horridus Linnaeus, 1758 -- valid -- crotale des bois, Timber Rattlesnake
  Crotalus intermedius Troschel, 1865 -- valid -- Mexican Smallhead Rattlesnake, Víbora-cascabel enana
  Crotalus intermedius gloydi Taylor, 1941 -- valid
  Crotalus intermedius intermedius Troschel in Müller, 1865 -- valid
  Crotalus intermedius omiltemanus Günther, 1895 -- valid
  Crotalus lannomi Tanner, 1966 -- valid -- Autlán Long-tailed Rattlesnake, Manantlán Long-tailed Rattlesnake, Víbora-cascabel de Autlán
  Crotalus lepidus (Kennicott, 1861) -- valid -- Rock Rattlesnake, Víbora-cascabel variable
  Crotalus lepidus klauberi Gloyd, 1936 -- valid -- Banded Rock Rattlesnake
  Crotalus lepidus lepidus (Kennicott, 1861) -- valid -- Mottled Rock Rattlesnake
  Crotalus lepidus maculosus Tanner, Dixon and Harris, 1972 -- valid -- Durangan Rock Rattlesnake
  Crotalus lepidus morulus Klauber, 1952 -- invalid
  Crotalus lorenzoensis Radcliffe and Maslin, 1975 -- valid -- San Lorenzo Island Rattlesnake
  Crotalus mitchellii (Cope, 1861) -- valid -- Speckled Rattlesnake
  Crotalus mitchellii angelensis Klauber, 1963 -- invalid
  Crotalus mitchellii mitchellii (Cope, 1861) -- invalid -- Speckled Rattlesnake
  Crotalus mitchellii muertensis Klauber, 1949 -- invalid
  Crotalus mitchellii pyrrhus (Cope, 1867) -- invalid -- Southwestern Speckled Rattlesnake
  Crotalus molossus Baird and Girard, 1853 -- valid -- Black-tailed Rattlesnake, Víbora-cascabel cola negra
  Crotalus molossus estebanensis Klauber, 1949 -- valid
  Crotalus molossus molossus Baird and Girard, 1853 -- valid -- Black-tailed Rattlesnake
  Crotalus molossus nigrescens Gloyd, 1936 -- valid -- Mexican Black-tailed Rattlesnake
  Crotalus molossus oaxacus Gloyd, 1948 -- valid -- Oaxacan Black-tailed Rattlesnake
  Crotalus oreganus Holbrook, 1840 -- valid -- Northern Pacific Rattlesnake, Western Rattlesnake
  Crotalus oreganus abyssus Klauber, 1930 -- valid -- Grand Canyon Rattlesnake
  Crotalus oreganus caliginis Klauber, 1949 -- valid
  Crotalus oreganus concolor Woodbury, 1929 -- valid -- Midget Faded Rattlesnake
  Crotalus oreganus helleri Meek, 1905 -- valid -- Southern Pacific Rattlesnake
  Crotalus oreganus lutosus Klauber, 1930 -- valid -- Great Basin Rattlesnake
  Crotalus oreganus oreganus Holbrook, 1840 -- valid -- Northern Pacific Rattlesnake
  Crotalus ornatus Hallowell, 1854 -- valid
  Crotalus polystictus (Cope, 1865) -- valid -- Mexican Lancehead Rattlesnake, Víbora-cascabel ocelada
  Crotalus pricei Van Denburgh, 1895 -- valid -- Twin-spotted Rattlesnake, Víbora-cascabel motas gemelas
  Crotalus pricei miquihuanus Gloyd, 1940 -- valid -- Eastern Twin Spotted Rattlesnake
  Crotalus pricei pricei Van Denburgh, 1895 -- valid -- Arizona Twin Spotted Rattlesnake, Twin-spotted Rattlesnake, Western Twin Spotted Rattlesnake
  Crotalus pusillus Klauber, 1952 -- valid -- Tancitaran Dusky Rattlesnake, Víbora-cascabel de Tancítaro
  Crotalus ravus Cope, 1865 -- valid -- Mexican Pygmy Rattlesnake, Víbora-cascabel pigmea-mexicana
  Crotalus ravus brunneus Harris and Simmons, 1978 -- valid -- Oaxacan Pygmy Rattlesnake
  Crotalus ravus exiguus (Campbell and Armstrong, 1979) -- valid -- Guerreran Pygmy Rattlesnake
  Crotalus ravus ravus Cope, 1865 -- valid -- Central Plateau Pygmy Rattlesnake
  Crotalus ruber Cope, 1892 -- valid -- Red Diamond Rattlesnake, Víbora-cascabel colorada
  Crotalus ruber exsul Garman, 1884 -- valid -- Cedros Island Rattlesnake
  Crotalus ruber lorenzoensis Radcliffe and Maslin, 1975 -- invalid
  Crotalus ruber lucasensis Van Denburgh, 1920 -- valid -- San Lucan Rattlesnake
  Crotalus ruber ruber Cope, 1892 -- valid -- Red Diamond Rattlesnake
  Crotalus scutulatus (Kennicott, 1861) -- valid -- Green Rattlesnake, Mohave Rattlesnake, Mojave Rattlesnake, Víbora-cascabel del Altiplano
  Crotalus scutulatus salvini Günther, 1895 -- valid -- Huamantlan Rattlesnake
  Crotalus scutulatus scutulatus (Kennicott, 1861) -- valid -- Mojave Rattlesnake, Northern Mohave Rattlesnake
  Crotalus simus Latreille in Sonnini and Latreille, 1801 -- valid -- Middle American Rattlesnake
  Crotalus stejnegeri Dunn, 1919 -- valid -- Sinaloan Long-tailed Rattlesnake, Víbora-cascabel cola larga
  Crotalus stephensi Klauber, 1930 -- valid -- Panamint Rattlesnake
  Crotalus tancitarensis Alvarado-Díaz and Campbell, 2004 -- valid
  Crotalus tigris Kennicott, 1859 -- valid -- Tiger Rattlesnake, Víbora-cascabel tigre
  Crotalus totonacus Gloyd and Kauffeld, 1940 -- valid -- Totonacan Rattlesnake
  Crotalus transversus Taylor, 1944 -- valid -- Cross-banded Mountain Rattlesnake, Víbora-cascabel bandas cruzadas
  Crotalus triseriatus (Wagler, 1830) -- valid -- Central Plateau Dusky Rattlesnake, Víbora-cascabel transvolcánica, Western Dusky Rattlesnake
  Crotalus triseriatus armstrongi Campbell, 1979 -- invalid
  Crotalus triseriatus triseriatus (Wagler, 1830) -- invalid
  Crotalus tzabcan Klauber, 1952 -- valid -- Yucatan Neotropical Rattlesnake
  Crotalus viridis (Rafinesque, 1818) -- valid -- Prairie Rattlesnake, Víbora-cascabel occidental, Western Rattlesnake
  Crotalus viridis nuntius Klauber, 1935 -- valid -- Hopi Rattlesnake
  Crotalus viridis viridis (Rafinesque, 1818) -- valid -- Prairie Rattlesnake
  Crotalus willardi Meek, 1905 -- valid -- Ridge-nosed Rattlesnake, Víbora-cascabel bigotuda
  Crotalus willardi amabilis Anderson, 1962 -- valid -- Del Nido Ridge-nosed Rattlesnake
  Crotalus willardi meridionalis Klauber, 1949 -- valid -- Southern Ridge-nosed Rattlesnake
  Crotalus willardi obscurus Harris and Simmons, 1974 -- valid -- Animas Ridge-nosed Rattlesnake, New Mexico Ridgenose Rattlesnake
  Crotalus willardi silus Klauber, 1949 -- valid -- Western Chihuahuan Ridge-nosed Rattlesnake
  Crotalus willardi willardi Meek, 1905 -- valid -- Arizona Ridgenose Rattlesnake
  Crotaphopeltis barotseensis Broadley, 1968 -- valid -- Barotse Water Snake
  Crotaphopeltis braestrupi Rasmussen, 1985 -- valid
  Crotaphopeltis degeni (Boulenger, 1906) -- valid -- Degen's Herald Snake, Yellow-flanked Snake
  Crotaphopeltis hippocrepis (Reinhardt, 1843) -- valid
  Crotaphopeltis hotamboeia (Laurenti, 1768) -- valid -- Red-lipped Snake, White-lipped Herald Snake
  Crotaphopeltis tornieri (Werner, 1908) -- valid -- Werner's Water Snake
  Cryophis hallbergi Bogert and Duellman, 1963 -- valid -- Culebra-de nebklina de Hallberg, Hallberg's Cloud Forest Snake
  Cubophis cantherigerus (Bibron, 1840) -- valid -- Cuban Racer
  Cubophis cantherigerus adspersus (Gundlach and Peters, 1864) -- valid
  Cubophis cantherigerus brooksi (Barbour, 1914) -- invalid
  Cubophis cantherigerus cantherigerus (Bibron, 1840) -- valid
  Cubophis cantherigerus pepei (Schwartz and Thomas, 1970) -- valid
  Cubophis cantherigerus schwartzi (Lando and Williams, 1969) -- valid
  Cubophis caymanus (Garman, 1887) -- valid -- Black Snake
  Cubophis fuscicauda (Garman, 1888) -- valid
  Cubophis ruttyi (Grant, 1941) -- valid
  Cubophis vudii (Cope, 1862) -- valid -- Bahamian Racer
  Cubophis vudii aterrimus (Barbour and Shreve, 1935) -- valid
  Cubophis vudii picticeps (Conant, 1937) -- valid
  Cubophis vudii raineyi (Barbour and Shreve, 1935) -- valid
  Cubophis vudii utowanae (Barbour and Shreve, 1935) -- valid
  Cubophis vudii vudii (Cope, 1862) -- valid
  Cyclocorus lineatus (Reinhardt, 1843) -- valid -- Reinhardt's Lined Snake
  Cyclocorus lineatus alcalai Leviton, 1967 -- valid
  Cyclocorus lineatus lineatus (Reinhardt, 1843) -- valid
  Cyclocorus nuchalis Taylor, 1923 -- valid -- Southern Triangle-spotted Snake
  Cyclocorus nuchalis nuchalis Taylor, 1923 -- valid
  Cyclocorus nuchalis taylori Leviton, 1967 -- valid
  Cyclophiops doriae Boulenger, 1888 -- valid -- Doria's Green Snake
  Cyclophiops hamptoni (Boulenger, 1900) -- valid -- Hampton's Green Snake
  Cyclophiops herminae (Boettger, 1895) -- valid -- Sakishima Green Snake
  Cyclophiops major (Günther, 1858) -- valid -- Chinese Green Snake
  Cyclophiops multicinctus (Roux, 1907) -- valid -- Many-banded Green Snake, North China Green Snake
  Cyclophiops semicarinatus (Hallowell, 1861) -- valid -- Ryukyu Green Snake
  Daboia deserti (J. Anderson, 1892) -- invalid
  Daboia mauritanica (Gray, 1849) -- valid -- Moorish Viper
  Daboia palaestinae (Werner, 1938) -- valid -- Palestine Viper
  Daboia russelii (Shaw and Nodder, 1797) -- valid -- Russel's Viper
  Daboia siamensis (M. A. Smith, 1917) -- valid -- Eastern Russel's Viper
  Dasypeltis abyssina (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Ethiopian Egg Eater
  Dasypeltis atra Sternfeld, 1912 -- valid -- African Egg-eating Snake, Montane Egg-eater
  Dasypeltis confusa Trape and Mané, 2006 -- valid -- Confusing Egg Eater
  Dasypeltis fasciata A. Smith, 1849 -- valid -- Central African Egg-eating Snake, Western Forest Eggeater
  Dasypeltis gansi Trape and Mané, 2006 -- valid -- Gans' Egg Eater
  Dasypeltis inornata A. Smith, 1849 -- valid -- Southern Brown Egg Eater
  Dasypeltis latericia Trape and Mané, 2006 -- valid
  Dasypeltis medici (Bianconi, 1859) -- valid -- East African Egg Eater
  Dasypeltis medici lamuensis Gans, 1957 -- valid
  Dasypeltis medici medici (Bianconi, 1859) -- valid
  Dasypeltis parascabra Trape, Mediannikov and Trape, 2012 -- valid
  Dasypeltis sahelensis Trape and Mané, 2006 -- valid -- Sahel Egg Eater
  Dasypeltis scabra (Linnaeus, 1758) -- valid -- Common Egg Eater, Rhombic Egg Eater
  Dasypeltis scabra loveridgei Mertens, 1954 -- valid
  Dasypeltis scabra scabra (Linnaeus, 1758) -- valid
  Deinagkistrodon acutus (Günther, 1888) -- valid -- Chinese Moccasin, Five-pacer Viper, Hundred-pace Viper
  Dendrelaphis andamanensis (Anderson, 1871) -- valid -- Andaman Bronze-back
  Dendrelaphis ashoki Vogel and Van Rooijen, 2011 -- valid -- Ashok's Bronzeback Tree Snake
  Dendrelaphis bifrenalis (Boulenger, 1890) -- valid -- Boulenger's Bronzeback
  Dendrelaphis biloreatus Wall, 1908 -- valid -- Gore's Bronzeback
  Dendrelaphis calligaster (Günther, 1867) -- valid -- Green Treesnake, Nothern Tree Snake
  Dendrelaphis caudolineatus (Gray, 1834) -- valid -- Gray Bronzeback, Striped Bronzeback
  Dendrelaphis caudolineolatus (Günther, 1869) -- valid
  Dendrelaphis chairecacos (F. Boie, 1827) -- valid
  Dendrelaphis cyanochloris (Wall, 1921) -- valid -- Wall's Bronzeback
  Dendrelaphis flavescens Gaulke, 1994 -- valid -- Sulu Bronzeback
  Dendrelaphis formosus (F. Boie, 1827) -- valid -- Elegant Bronzeback
  Dendrelaphis fuliginosus Griffin, 1909 -- valid
  Dendrelaphis gastrostictus (Boulenger, 1894) -- valid -- Montane Treesnake
  Dendrelaphis girii Vogel and Van Rooijen, 2011 -- valid
  Dendrelaphis grandoculis (Boulenger, 1890) -- valid -- Southern Bronzeback
  Dendrelaphis grismeri Vogel and Van Rooijen, 2008 -- valid
  Dendrelaphis haasi Van Rooijen and Vogel, 2008 -- valid -- Haas's Bronzeback Snake
  Dendrelaphis hollinrakei Lazell, 2002 -- valid
  Dendrelaphis humayuni Tiwari and Biswas, 1973 -- valid -- Tiwar's Bronzeback
  Dendrelaphis inornatus Boulenger, 1897 -- valid -- Lesser Sundas Bronzeback
  Dendrelaphis inornatus timorensis M. A. Smith, 1927 -- invalid -- Eastern Sundas Bronzeback
  Dendrelaphis kopsteini Vogel and Van Rooijen, 2007 -- valid -- Kopstein's Bronzeback Snake
  Dendrelaphis levitoni Van Rooijen and Vogel, 2012 -- valid
  Dendrelaphis lorentzii (Lidth de Jeude, 1911) -- valid -- Lorentz River Treesnake
  Dendrelaphis luzonensis Leviton, 1961 -- valid
  Dendrelaphis marenae Vogel and Van Rooijen, 2008 -- valid -- Maren's Bronzeback
  Dendrelaphis modestus Boulenger, 1894 -- valid -- Gray Bronzeback, Striped Bronzeback
  Dendrelaphis ngansonensis (Bourret, 1935) -- valid -- Nganson Bronzeback
  Dendrelaphis nigroserratus Vogel, Van Rooijen and Hauser, 2012 -- valid -- Saw-tooth-necked Bronzeback
  Dendrelaphis oliveri (Taylor, 1950) -- valid -- Oliver's Bronzeback
  Dendrelaphis papuensis Boulenger, 1895 -- valid -- Papuan Treesnake
  Dendrelaphis philippinensis (Günther, 1879) -- valid
  Dendrelaphis pictus (Gmelin, 1789) -- valid -- Common Bronze-back, Indonesian Bronze-back, Painted Bronzeback
  Dendrelaphis punctulatus (Gray, 1826) -- valid -- Common Bronzeback, Common Tree Snake, Green Tree Snake
  Dendrelaphis punctulatus striolatus (Peters, 1867) -- invalid
  Dendrelaphis salomonis (Günther, 1872) -- invalid
  Dendrelaphis schokari (Kuhl, 1820) -- valid
  Dendrelaphis striatus (Cohn, 1905) -- valid -- Banded Bronzeback
  Dendrelaphis subocularis (Boulenger, 1888) -- valid -- Burmese Bronzeback, Mountain Bronzeback
  Dendrelaphis terrificus (Peters, 1872) -- valid -- Terrific Bronzeback
  Dendrelaphis tristis (Daudin, 1803) -- valid -- Common Bronzeback Tree Snake, Daudin's Bronzeback
  Dendrelaphis underwoodi Van Rooijen and Vogel, 2008 -- valid -- Underwood's Bronzeback Snake
  Dendrelaphis walli Vogel and Van Rooijen, 2011 -- valid
  Dendrolycus elapoides (Günther, 1874) -- valid -- Cameroon Rainforest Snake
  Dendrolycus elapoides angusticinctus (Laurent, 1952) -- valid
  Dendrolycus elapoides elapoides (Günther, 1874) -- valid
  Dendrophidion apharocybe Cadle, 2012 -- valid
  Dendrophidion atlantica Freire, Caramaschi and Gonçalves, 2010 -- valid -- Atlantic Forest Racer
  Dendrophidion bivittatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Forest Racer
  Dendrophidion boshelli Dunn, 1944 -- valid -- Hoshell's Forest Racer
  Dendrophidion brunneum (Günther, 1858) -- valid -- Günther's Forest Racer
  Dendrophidion clarkii Dunn, 1933 -- valid -- Clark's Forest Racer
  Dendrophidion crybelum Cadle, 2012 -- valid
  Dendrophidion dendrophis (Schlegel, 1837) -- valid -- Olive Forest Racer
  Dendrophidion graciliverpa Cadle, 2012 -- valid
  Dendrophidion nuchale (Peters, 1863) -- valid -- Peters' Forest Racer
  Dendrophidion paucicarinatum (Cope, 1894) -- valid -- Cope's Forest Racer
  Dendrophidion percarinatum (Cope, 1893) -- valid -- South American Forest Racer
  Dendrophidion prolixum Cadle, 2012 -- valid
  Dendrophidion rufiterminorum Cadle and Savage, 2012 -- valid
  Dendrophidion vinitor H. M. Smith, 1941 -- valid -- Barred Forest Racer, Culebra-corredora barrada
  Diadophis punctatus (Linnaeus, 1766) -- valid -- couleuvre à collier, Culebra de collar, Ring-necked Snake, Ringneck Snake
  Diadophis punctatus acricus Paulson, 1966 -- valid -- Key Ringneck Snake
  Diadophis punctatus amabilis Baird and Girard, 1853 -- valid -- Pacific Ringneck Snake
  Diadophis punctatus arnyi Kennicott, 1859 -- valid -- Prairie Ringneck Snake
  Diadophis punctatus dugesii Villada, 1875 -- valid
  Diadophis punctatus edwardsii (Merrem, 1820) -- valid -- Northern Ringneck Snake
  Diadophis punctatus modestus Bobourt, 1866 -- valid -- San Bernardino Ringneck Snake
  Diadophis punctatus occidentalis Blanchard, 1923 -- valid -- Northwestern Ringneck Snake
  Diadophis punctatus pulchellus Baird and Girard, 1853 -- valid -- Coralbelly Ringneck Snake
  Diadophis punctatus punctatus (Linnaeus, 1766) -- valid -- Southern Ringneck Snake
  Diadophis punctatus regalis Baird and Girard, 1853 -- valid -- Regal Ringsnake Snake
  Diadophis punctatus similis Blanchard, 1923 -- valid -- San Diego Ringneck Snake
  Diadophis punctatus stictogenys Cope, 1860 -- valid -- Mississippi Ringneck Snake
  Diadophis punctatus vandenburgii Blanchard, 1923 -- valid -- Monterey Ringneck Snake
  Diaphorolepis laevis Werner, 1923 -- valid -- Colombian Frog-eating Snake
  Diaphorolepis wagneri Jan, 1863 -- valid -- Ecuador Frog-eating Snake
  Dipsadinae -- valid
  Dipsadoboa aulica (Günther, 1864) -- valid -- Cross-barred Snake, Marbled Tree Snake
  Dipsadoboa brevirostris (Sternfeld, 1908) -- valid
  Dipsadoboa duchesnii (Boulenger, 1901) -- valid
  Dipsadoboa flavida (Broadley and Stevens, 1971) -- valid
  Dipsadoboa flavida broadleyi Rasmussen, 1989 -- valid -- Cross-barred Tree Snake
  Dipsadoboa flavida flavida (Broadley and Stevens, 1971) -- valid
  Dipsadoboa shrevei (Loveridge, 1932) -- valid -- Nocturnal Tree Snake, Shreve's Tree Snake
  Dipsadoboa shrevei kageleri (Uthmöller, 1939) -- valid
  Dipsadoboa shrevei shrevei (Loveridge, 1932) -- valid
  Dipsadoboa underwoodi Rasmussen, 1993 -- valid
  Dipsadoboa unicolor Günther, 1858 -- valid -- Günther's Green Tree Snake
  Dipsadoboa viridis (Peters, 1869) -- valid
  Dipsadoboa viridis gracilis Laurent, 1956 -- valid
  Dipsadoboa viridis viridis (Peters, 1869) -- valid
  Dipsadoboa weileri (Lindholm, 1905) -- valid
  Dipsadoboa werneri (Boulenger, 1897) -- valid -- Werner's Green Tree Snake
  Dipsas albifrons (Sauvage, 1884) -- valid -- Sauvage's Snail-eater
  Dipsas alternans (Fischer, 1885) -- valid -- Jan's Snail-eater
  Dipsas andiana (Boulenger, 1896) -- valid
  Dipsas articulata (Cope, 1868) -- valid -- American Snail-eater
  Dipsas baliomelas Harvey, 2008 -- valid
  Dipsas bicolor (Günther, 1895) -- valid -- Two-colored Snail-eater
  Dipsas brevifacies (Cope, 1866) -- valid -- Culebra-caracolera chata, Snail-eating Thirst Snake
  Dipsas bucephala (Shaw, 1802) -- valid -- Neotropical Snail-eater
  Dipsas catesbyi (Sentzen, 1796) -- valid -- Catesby's Snail-eater
  Dipsas chaparensis Reynolds and Foster, 1992 -- valid
  Dipsas copei (Günther, 1872) -- valid
  Dipsas elegans (Boulenger, 1896) -- valid
  Dipsas ellipsifera (Boulenger, 1898) -- valid
  Dipsas gaigeae (Oliver, 1937) -- valid -- Culebra-caracolera de Gaige, Gaige's Thirst Snail-eater
  Dipsas gracilis (Boulenger, 1902) -- valid -- Graceful Snail-eater
  Dipsas incerta (Jan, 1863) -- valid -- Jan's Snail-eater
  Dipsas indica Laurenti, 1768 -- valid -- Neotropical Snail-eater
  Dipsas indica ecuadoriensis Peters, 1960 -- valid
  Dipsas indica indica Laurenti, 1768 -- valid
  Dipsas indica petersi Hoge, 1975 -- valid
  Dipsas infrenalis Rosen, 1905 -- invalid
  Dipsas maxillaris (Werner, 1910) -- valid -- Werner's Thirst Snake
  Dipsas nicholsi (Dunn, 1933) -- valid
  Dipsas oreas (Cope, 1868) -- valid -- Ecuador Snail-eater
  Dipsas pakaraima MacCulloch and Lathrop, 2004 -- valid
  Dipsas pavonina Schlegel, 1837 -- valid -- Northern Snail-eater
  Dipsas peruana (Boettger, 1898) -- valid -- Peru Snail-eater
  Dipsas pratti (Boulenger, 1897) -- valid -- Pratt's Snail-eater
  Dipsas sanctijoannis (Boulenger, 1911) -- valid -- Tropical Snail-eater
  Dipsas sazimai Fernandes, Marques and Argôlo, 2010 -- valid
  Dipsas schunkii (Boulenger, 1908) -- valid -- Schunk's Snail-eater
  Dipsas temporalis (Werner, 1909) -- valid -- Temporal Snail-eater
  Dipsas tenuissima Taylor, 1954 -- valid -- Taylor's Snail-eater
  Dipsas variegata (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Variegated Snail-eater
  Dipsas variegata trinitatis Parker, 1926 -- invalid
  Dipsas vermiculata Peters, 1960 -- valid -- Vermiculate Snail-eater
  Dipsas viguieri (Bocourt, 1884) -- valid -- Bocourt's Snail-eater
  Dipsina multimaculata (A. Smith, 1847) -- valid -- Dwarf Beaked Snake, Western Beaked Snake
  Dispholidus typus (A. Smith, 1828) -- valid -- Boomslang
  Dispholidus typus kivuensis Laurent, 1955 -- valid
  Dispholidus typus punctatus Laurent, 1955 -- valid
  Dispholidus typus typus (A. Smith, 1828) -- valid
  Ditaxodon taeniatus (Peters in Hensel, 1868) -- valid -- Hensel's Snake
  Ditypophis vivax Günther, 1881 -- valid -- Günther's Racer
  Dolichophis caspius (Gmelin, 1789) -- valid
  Dolichophis caspius caspius (Gmelin, 1789) -- valid
  Dolichophis caspius eiselti (Zinner, 1972) -- valid
  Dolichophis jugularis (Linnaeus, 1758) -- valid -- Large Whip Snake
  Dolichophis jugularis asianus (Boettger, 1880) -- valid
  Dolichophis jugularis cypriacus (Zinner, 1972) -- valid
  Dolichophis jugularis jugularis (Linnaeus, 1758) -- valid
  Dolichophis schmidti (Nikolsky, 1909) -- valid
  Drepanoides anomalus (Jan, 1863) -- valid -- Black-collared Snake
  Dromicodryas bernieri (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Bernier's Striped Snake
  Dromicodryas quadrilineatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Four-striped Snake
  Dromicus juliae copeae Parker, 1936 -- invalid
  Drymarchon caudomaculatus Wüster, Yrausquin and Mijares-Urrutia, 2001 -- valid
  Drymarchon corais (F. Boie, 1827) -- valid -- Indigo Snake, Yellow-tail Cribo
  Drymarchon corais corais (F. Boie, 1827) -- invalid -- Indigo Snake, Yellow-tailed Cribo
  Drymarchon corais orizabensis (Dugès, 1905) -- invalid
  Drymarchon corais rubidus H. M. Smith, 1941 -- invalid
  Drymarchon corais unicolor H. M. Smith, 1941 -- invalid
  Drymarchon couperi (Holbrook, 1842) -- valid -- Blue Bull Snake, Blue Indigo Snake, Eastern Indigo Snake
  Drymarchon margaritae Roze, 1959 -- valid -- Margarita Indigo Snake
  Drymarchon melanurus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Blacktail Cribo, Middle American Indigo Snake
  Drymobius chloroticus (Cope, 1886) -- valid -- Culebra-corredora verdosa, Green Highland Racer
  Drymobius margaritiferus (Schlegel, 1837) -- valid -- Central American Speckled Racer, Culebra-corredora de Petatillos
  Drymobius margaritiferus fistulosus H. M. Smith, 1942 -- valid
  Drymobius margaritiferus margaritiferus (Schlegel, 1837) -- valid -- Speckled Racer
  Drymobius margaritiferus maydis Villa, 1968 -- valid
  Drymobius margaritiferus occidentalis Bocourt, 1890 -- valid
  Drymobius melanotropis (Cope, 1876) -- valid -- Black Forest Racer
  Drymobius rhombifer (Günther, 1860) -- valid -- Esmarald Racer
  Drymoluber apurimacensis Lehr, Carrillo and Hocking, 2004 -- valid -- Apurímac Woodland Racer
  Drymoluber brazili (Gomes, 1918) -- valid -- Brazilian Woodland Racer
  Drymoluber dichrous (Peters, 1863) -- valid -- Northern Woodland Racer
  Dryocalamus davisonii (Blanford, 1878) -- valid -- Blanford's Bridle Snake, Bridle Snake
  Dryocalamus gracilis (Günther, 1864) -- valid -- Scarce Bridal Snake
  Dryocalamus nympha (Daudin, 1803) -- valid -- Vellore Bridal Snake
  Dryocalamus philippinus Griffin, 1909 -- valid -- Philippine Dryocalamus
  Dryocalamus subannulatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Malayan Bridal Snake, Southern Bridle Snake
  Dryocalamus tristrigatus Günther, 1858 -- valid
  Dryophiops philippina Boulenger, 1896 -- valid -- Philippine Whip Snake
  Dryophiops rubescens (Gray, 1835) -- valid -- Brown Whip Snake, Red Whip Snake
  Duberria lutrix (Linnaeus, 1758) -- valid -- Common Slug Eater
  Duberria lutrix abyssinica (Boulenger, 1894) -- valid
  Duberria lutrix atriventris (Sternfeld, 1912) -- valid
  Duberria lutrix basilewskyi Skelton-Bourgeois, 1961 -- valid
  Duberria lutrix currylindahli Laurent, 1956 -- valid
  Duberria lutrix lutrix (Linnaeus, 1758) -- valid
  Duberria lutrix rhodesiana Broadley, 1958 -- invalid
  Duberria shirana (Boulenger, 1894) -- valid -- Shire Slug Eater
  Duberria variegata (Peters, 1854) -- valid -- Spotted Slug Eater, Variegated Slug Eater
  Echinanthera amoena (Jan, 1863) -- valid
  Echinanthera cephalomaculata Di Bernardo, 1994 -- valid
  Echinanthera cephalostriata Di Bernardo, 1996 -- valid
  Echinanthera cyanopleura (Cope, 1885) -- valid
  Echinanthera melanostigma (Wagler, 1824) -- valid
  Echinanthera undulata (Wied-Neuwied, 1824) -- valid
  Echis borkini Cherlin, 1990 -- valid
  Echis carinatus (Schneider, 1801) -- valid -- Phoorsa, Saw-scaled Viper
  Echis carinatus carinatus (Schneider, 1801) -- valid
  Echis carinatus sochureki Stemmler, 1969 -- valid
  Echis coloratus Günther, 1878 -- valid -- Palestine Saw-scaled Viper
  Echis coloratus coloratus Günther, 1878 -- valid
  Echis coloratus terraesanctae Babocsay, 2003 -- valid
  Echis hughesi Cherlin, 1990 -- valid -- Hughes' Saw-scaled Viper
  Echis jogeri Cherlin, 1990 -- valid -- Joger's Saw-scaled Viper
  Echis khosatzkii Cherlin, 1990 -- valid
  Echis leucogaster Roman, 1972 -- valid -- Roman's Saw-scaled Viper
  Echis megalocephalus Cherlin, 1990 -- valid -- Cherlin's Saw-scaled Viper, Large-headed Carpet Viper
  Echis ocellatus Stemmler, 1970 -- valid -- African Saw-scaled Viper, West African Carpet Viper
  Echis omanensis Babocsay, 2004 -- valid -- Oman Saw-scaled Viper
  Echis pyramidum (Geoffroy de St-Hilaire in Savigny, 1827) -- valid -- Egyptian Saw-scaled Viper, North-East African Carpet Viper
  Echis pyramidum leakeyi Stemmler and Sochurek, 1969 -- valid
  Echis pyramidum lucidus Cherlin, 1990 -- valid
  Echis pyramidum pyramidum (Geoffroy de St-Hilaire in Savigny, 1827) -- valid
  Eirenis africanus (Boulenger, 1914) -- valid -- African Dwarf Snake
  Eirenis aurolineatus (Venzmer, 1919) -- valid
  Eirenis barani Schmidtler, 1988 -- valid -- Baran Dwarf Racer
  Eirenis barani barani Schmidtler, 1988 -- valid
  Eirenis barani bischofforum Schmidtler, 1997 -- valid
  Eirenis collaris (Ménétries, 1832) -- valid -- Collared Dwarf Racer
  Eirenis collaris collaris (Ménétriés, 1832) -- valid
  Eirenis collaris macrospilotus (Werner, 1904) -- valid
  Eirenis coronella (Schlegel, 1837) -- valid -- Crowned Dwarf Racer
  Eirenis coronella coronella (Schlegel, 1837) -- valid
  Eirenis coronella fennelli Arnold, 1982 -- valid
  Eirenis coronella ibrahimi Sivan and Werner, 2003 -- valid
  Eirenis coronelloides (Jan, 1862) -- valid
  Eirenis decemlineatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Eirenis eiselti Schmidtler, 1978 -- valid -- Eiselt's Dwarf Racer
  Eirenis hakkariensis Schmidtler and Eiselt, 1991 -- valid
  Eirenis kermanensis Rajabizadeh, Schmidtler, Orlov and Soleimani, 2012 -- valid
  Eirenis levantinus Schmidtler, 1993 -- valid
  Eirenis lineomaculatus Schmidt, 1939 -- valid
  Eirenis medus (Chernov, 1940) -- valid
  Eirenis modestus (Martin, 1838) -- valid -- Asia Minor Dwarf Racer
  Eirenis modestus cilicius Schmidtler, 1993 -- valid
  Eirenis modestus modestus (Martin, 1838) -- valid
  Eirenis modestus semimaculatus (Boettger, 1876) -- valid
  Eirenis persicus (Anderson, 1872) -- valid -- Dark-headed Dwarf Racer
  Eirenis persicus nigrofasciatus (Nikolsky, 1907) -- valid
  Eirenis persicus persicus (Anderson, 1872) -- valid
  Eirenis punctatolineatus (Boettger, 1892) -- valid -- Dotted Dwarf Racer
  Eirenis punctatolineatus condoni (Boulenger, 1920) -- valid
  Eirenis punctatolineatus punctatolineatus (Boettger, 1892) -- valid
  Eirenis rechingeri Eiselt, 1971 -- valid -- Rechinger's Dwarf Racer
  Eirenis rothii Jan, 1863 -- valid -- Roth's Dwarf Racer
  Eirenis thospitis Schmidtler and Lanza, 1990 -- valid
  Elachistodon westermanni Reinhardt, 1863 -- valid -- Indian Egg-eating Snake
  Elaphe anomala (Boulenger, 1916) -- valid
  Elaphe bimaculata Schmidt, 1925 -- valid -- Chinese Leopard Snake
  Elaphe carinata (Günther, 1864) -- valid -- Taiwan Stink Snake
  Elaphe carinata carinata (Günther, 1864) -- valid
  Elaphe carinata yonaguniensis Takara, 1962 -- valid
  Elaphe climacophora (H. Boie, 1826) -- valid -- Japanese Ratsnake
  Elaphe davidi (Sauvage, 1884) -- valid -- Pere David's Rat Snake
  Elaphe dione (Pallas, 1773) -- valid -- Steppes Ratsnake
  Elaphe quadrivirgata (H. Boie, 1826) -- valid -- Japanese Four-lined Ratsnake
  Elaphe quatuorlineata (Bonnaterre, 1790) -- valid -- Four-lined Ratsnake
  Elaphe quatuorlineata muenteri (Bedriaga, 1882) -- valid
  Elaphe quatuorlineata parensis Cattaneo, 1999 -- valid
  Elaphe quatuorlineata quatuorlineata (Bonnaterre, 1790) -- valid
  Elaphe quatuorlineata scyrensis Cattaneo, 1999 -- valid
  Elaphe sauromates (Pallas, 1811) -- valid -- East-Four-lined Ratsnake
  Elaphe schrenckii Strauch, 1873 -- valid -- Amur Ratsnake, Siberian Ratsnake
  Elaphe zoigeensis Huang, Ding, Burbrink, Yang, Huang, Ling, Chen and Zhang, 2012 -- valid -- Zoige Ratsnake
  Elapoidis H. Boie in F. Boie, 1827 -- valid
  Elapoidis fusca F. Boie in H. Boie, 1827 -- valid
  Elapomorphus lepidus Reinhardt, 1861 -- invalid
  Elapomorphus quinquelineatus (Raddi, 1820) -- valid -- Raddi's Lizard-eating Snake
  Elapomorphus spegazzinii Boulenger, 1913 -- invalid
  Elapomorphus spegazzinii suspectus Amaral, 1924 -- invalid
  Elapomorphus wuchereri Günther, 1861 -- valid -- Wucherer's Lizard-eating Snake
  Elapotinus picteti Jan, 1862 -- valid
  Emmochliophis fugleri Fritts and H. M. Smith, 1969 -- valid -- Pinchinda Snake
  Emmochliophis miops (Boulenger, 1898) -- valid
  Enuliophis sclateri (Boulenger, 1894) -- valid -- Colombian Longtail Snake
  Enulius bifoveatus McCranie and Köhler, 1999 -- valid
  Enulius flavitorques (Cope, 1868) -- valid -- Culebra-cola larga del Pacífico, Pacific Longtail Snake
  Enulius flavitorques flavitorques (Cope, 1868) -- valid
  Enulius flavitorques sumichrasti Bocourt, 1883 -- valid
  Enulius flavitorques unicolor (Fischer, 1881) -- valid
  Enulius oligostichus H. M. Smith, Arndt and Sherbrook, 1967 -- valid -- Culebra-cola larga mexicana, Mexican Longtail Snake
  Enulius roatanensis McCranie and Köhler, 1999 -- valid
  Epicrates alvarezi Abalos, Baez and Nader, 1964 -- valid
  Epicrates assisi Machado, 1945 -- valid
  Epicrates cenchria (Linnaeus, 1758) -- valid -- Rainbow Boa
  Epicrates cenchria cenchria (Linnaeus, 1758) -- invalid
  Epicrates cenchria polylepis Amaral, 1935 -- invalid
  Epicrates crassus Cope, 1862 -- valid
  Epicrates maurus Gray, 1849 -- valid -- Rainbow Boa
  Epicrates maurus guyanensis Matz, 2005 -- invalid
  Epicrates maurus maurus Gray, 1849 -- invalid
  Erythrolamprus aesculapii (Linnaeus, 1758) -- valid -- Aesculapian False Coral Snake, False Coral Snake
  Erythrolamprus aesculapii aesculapii (Linnaeus, 1758) -- valid
  Erythrolamprus aesculapii monozona Jan, 1863 -- valid
  Erythrolamprus aesculapii tetrazona Jan, 1863 -- valid
  Erythrolamprus aesculapii venustissimus (Wied-Neuwied, 1821) -- valid
  Erythrolamprus albertguentheri Grazziotin, Zaher, Murphy, Scrocchi, Benavides, Zhang and Bonatto, 2012 -- valid -- Günther's Green Liophis, Günther's Green Liophis
  Erythrolamprus almadensis (Wagler, 1824) -- valid -- Almaden Ground Snake
  Erythrolamprus andinus (Dixon, 1983) -- valid
  Erythrolamprus atraventer (Dixon and Thomas, 1985) -- valid -- Dixon's Ground Snake
  Erythrolamprus bizona Jan, 1863 -- valid -- False Coral Snake
  Erythrolamprus breviceps (Cope, 1860) -- valid -- Short Ground Snake
  Erythrolamprus breviceps breviceps (Cope, 1860) -- invalid
  Erythrolamprus breviceps canaima (Roze, 1955) -- invalid
  Erythrolamprus carajasensis (da Cunha, Nascimento and Avila-Pires, 1985) -- valid
  Erythrolamprus ceii (Dixon, 1991) -- valid
  Erythrolamprus cobella (Linnaeus, 1758) -- valid -- Mangrove Snake
  Erythrolamprus cursor (Lacépède, 1789) -- valid -- Lacépède's Ground Snake
  Erythrolamprus dorsocorallinus (Esqueda, Natera, la Marca and Ilija-Fistar, 2007) -- valid
  Erythrolamprus epinephelus (Cope, 1862) -- valid
  Erythrolamprus epinephelus albiventris (Jan, 1863) -- valid
  Erythrolamprus epinephelus bimaculatus (Cope, 1899) -- valid
  Erythrolamprus epinephelus epinephelus (Cope, 1862) -- valid
  Erythrolamprus epinephelus fraseri (Boulenger, 1894) -- valid
  Erythrolamprus epinephelus juvenalis (Dunn, 1937) -- valid
  Erythrolamprus epinephelus lamonae (Dunn, 1944) -- valid
  Erythrolamprus epinephelus opisthotaenius (Boulenger, 1908) -- valid
  Erythrolamprus epinephelus pseudocobella (Peracca, 1914) -- valid
  Erythrolamprus festae (Peracca, 1897) -- valid -- Drab Ground Snake
  Erythrolamprus frenatus (Werner, 1909) -- valid -- Swamp Liophis
  Erythrolamprus guentheri Garman, 1883 -- valid -- Günther's False Coral Snake
  Erythrolamprus ingeri (Roze, 1958) -- valid
  Erythrolamprus jaegeri (Günther, 1858) -- valid -- Jaeger's Ground Snake
  Erythrolamprus jaegeri coralliventris (Boulenger, 1894) -- valid
  Erythrolamprus jaegeri jaegeri (Günther, 1858) -- valid
  Erythrolamprus janaleeae (Dixon, 2000) -- valid
  Erythrolamprus juliae (Cope, 1879) -- valid -- Julia's Ground Snake
  Erythrolamprus juliae copeae (Parker, 1936) -- valid
  Erythrolamprus juliae juliae (Cope, 1879) -- valid
  Erythrolamprus leucogaster (Jan, 1863) -- invalid
  Erythrolamprus longiventris (Amaral, 1925) -- valid -- Long Ground Snake
  Erythrolamprus maryellenae (Dixon, 1985) -- valid -- Maryellen's Ground Snake
  Erythrolamprus melanotus (Shaw, 1802) -- valid -- Shaw's Black-backed Snake, Shaw's Dark Ground Snake
  Erythrolamprus melanotus lamari (Dixon and Michaud, 1992) -- valid
  Erythrolamprus melanotus melanotus (Shaw, 1802) -- valid
  Erythrolamprus melanotus nesos (Dixon and Michaud, 1992) -- valid
  Erythrolamprus mertensi (Roze, 1964) -- valid -- Mertens' Tropical Forest Snake
  Erythrolamprus miliaris (Linnaeus, 1758) -- valid -- Military Ground Snake
  Erythrolamprus miliaris amazonicus (Dunn, 1922) -- valid
  Erythrolamprus miliaris chrysostomus (Cope, 1868) -- valid
  Erythrolamprus miliaris kogiorum (Bernal-Carlo, 1994) -- invalid
  Erythrolamprus miliaris merremi (Wied-Neuwied, 1821) -- valid
  Erythrolamprus miliaris miliaris (Linnaeus, 1758) -- valid
  Erythrolamprus miliaris orinus (Griffin, 1916) -- valid
  Erythrolamprus mimus (Cope, 1868) -- valid -- Mimic False Coral Snake
  Erythrolamprus mimus micrurus Dunn and Bailey, 1939 -- valid
  Erythrolamprus mimus mimus (Cope, 1868) -- valid
  Erythrolamprus mossoroensis (Hoge and Lima-Verde, 1973) -- valid
  Erythrolamprus ocellatus Peters, 1869 -- valid -- Red Snake, Tobago False Coral Snake
  Erythrolamprus ornatus (Garman, 1887) -- valid -- Saint Lucia Racer
  Erythrolamprus perfuscus (Cope, 1863) -- valid -- Tan Ground Snake
  Erythrolamprus poecilogyrus (Wied-Neuwied, 1825) -- valid
  Erythrolamprus poecilogyrus caesius (Cope, 1862) -- valid
  Erythrolamprus poecilogyrus poecilogyrus (Wied-Neuwied, 1825) -- valid
  Erythrolamprus poecilogyrus reticulatus (Parker, 1931) -- invalid
  Erythrolamprus poecilogyrus schotti (Schlegel, 1837) -- valid
  Erythrolamprus poecilogyrus sublineatus (Cope, 1860) -- valid
  Erythrolamprus problematicus (Myers, 1986) -- valid -- Problem Ground Snake
  Erythrolamprus pseudocorallus Roze, 1959 -- valid -- False Coral Snake
  Erythrolamprus pyburni (Markezich and Dixon, 1979) -- valid -- Pyburn's Tropical Forest Snake
  Erythrolamprus pygmaeus (Cope, 1868) -- valid -- Amazon Tropical Forest Snake
  Erythrolamprus reginae (Linnaeus, 1758) -- valid -- Royal Ground Snake
  Erythrolamprus reginae macrosoma (Amaral, 1936) -- valid
  Erythrolamprus reginae reginae (Linnaeus, 1758) -- valid
  Erythrolamprus reginae semilineatus (Wagler, 1824) -- valid
  Erythrolamprus reginae zweifeli (Roze, 1959) -- invalid
  Erythrolamprus sagittifer (Jan, 1863) -- valid -- Arrow Ground Snake
  Erythrolamprus sagittifer modestus (Koslowsky, 1896) -- valid
  Erythrolamprus sagittifer sagittifer (Jan, 1863) -- valid
  Erythrolamprus semiaureus (Cope, 1862) -- valid
  Erythrolamprus steinbachi (Boulenger, 1905) -- invalid
  Erythrolamprus subocularis (Boulenger, 1902) -- valid
  Erythrolamprus taeniogaster (Jan, 1866) -- valid
  Erythrolamprus taeniurus (Tschudi, 1845) -- valid -- Thin Ground Snake
  Erythrolamprus torrenicola (Donnelly and Myers, 1991) -- valid -- Velvety Swamp Snake
  Erythrolamprus trebbaui (Roze, 1958) -- valid
  Erythrolamprus triscalis (Linnaeus, 1758) -- valid -- Three-scaled Ground Snake
  Erythrolamprus typhlus (Linnaeus, 1758) -- valid -- Blind Ground Snake, Velvet Swampsnake
  Erythrolamprus typhlus brachyurus (Cope, 1887) -- valid
  Erythrolamprus typhlus elaeoides (Griffin, 1916) -- valid
  Erythrolamprus typhlus typhlus (Linnaeus, 1758) -- valid
  Erythrolamprus viridis (Günther, 1862) -- valid -- Crown Ground Snake
  Erythrolamprus viridis prasinus (Jan and Sordelli, 1866) -- valid
  Erythrolamprus viridis viridis (Günther, 1862) -- valid
  Erythrolamprus vitti (Dixon, 2000) -- valid
  Erythrolamprus williamsi (Roze, 1958) -- valid -- Williams' Ground Snake
  Eryx borrii Lanza and Nistri, 2005 -- valid
  Eryx colubrinus (Linnaeus, 1758) -- valid
  Eryx colubrinus colubrinus (Linnaeus, 1758) -- valid
  Eryx colubrinus loveridgei Stull, 1932 -- valid
  Eryx conicus (Schneider, 1801) -- valid
  Eryx conicus brevis Deraniyagala, 1951 -- valid
  Eryx conicus conicus (Schneider, 1801) -- valid
  Eryx elegans (Gray, 1849) -- valid
  Eryx jaculus (Linnaeus, 1758) -- valid
  Eryx jaculus familiaris Eichwald, 1831 -- valid
  Eryx jaculus jaculus (Linnaeus, 1758) -- valid
  Eryx jaculus turcicus (Olivier, 1801) -- valid
  Eryx jayakari Boulenger, 1888 -- valid
  Eryx johnii (Russell, 1801) -- valid
  Eryx johnii johnii (Russell, 1801) -- valid
  Eryx johnii persicus Nikolsky, 1907 -- valid
  Eryx miliaris (Pallas, 1773) -- valid
  Eryx miliaris miliaris (Pallas, 1773) -- valid
  Eryx miliaris nogaiorum Nikolsky, 1910 -- valid
  Eryx muelleri (Boulenger, 1892) -- valid
  Eryx muelleri muelleri (Boulenger, 1892) -- valid
  Eryx muelleri subniger Angel, 1938 -- valid
  Eryx somalicus Scortecci, 1939 -- valid
  Eryx tataricus (Lichtenstein, 1823) -- valid
  Eryx tataricus speciosus Carevskij, 1916 -- valid
  Eryx tataricus tataricus (Lichtenstein, 1823) -- valid
  Eryx tataricus vittatus Chernov, 1959 -- invalid
  Eryx whitakeri Das, 1991 -- valid
  Etheridgeum pulchrum (Werner, 1924) -- valid -- Sumatra Etheridge Snake
  Eunectes beniensis Dirksen, 2002 -- valid
  Eunectes deschauenseei Dunn and Conant, 1936 -- valid
  Eunectes murinus (Linnaeus, 1758) -- valid
  Eunectes notaeus Cope, 1862 -- valid
  Euprepiophis conspicillata (H. Boie, 1826) -- valid -- Burrowing Ratsnake, Japanese Woodsnake
  Euprepiophis mandarinus (Cantor, 1842) -- valid -- Mandarin Ratsnake
  Euprepiophis perlacea (Stejneger, 1929) -- valid -- Pearl-banded Rat Snake, Szechwan Rat Snake
  Eutaenia atrata Kennicott in Cooper, 1860 -- invalid
  Eutaenia biscutata Cope, 1883 -- invalid
  Eutaenia chrysocephala Cope, 1885 -- invalid
  Eutaenia couchii Kennicott in Baird, 1859 -- invalid
  Eutaenia cyrtopsis Kennicott, 1860 -- invalid
  Eutaenia cyrtopsis fulvus Bocourt, 1893 -- invalid
  Eutaenia cyrtopsis ocellata Cope, 1880 -- invalid
  Eutaenia dorsalis Baird and Girard, 1853 -- invalid
  Eutaenia elegans Baird and Girard, 1853 -- invalid
  Eutaenia elegans lineolata Cope, 1892 -- invalid
  Eutaenia marcianus Baird and Girard, 1853 -- invalid
  Eutaenia megalops Kennicott, 1860 -- invalid
  Eutaenia praeocularis Bocourt, 1892 -- invalid
  Eutaenia pulchrilatus Cope, 1885 -- invalid
  Eutaenia rutiloris Cope, 1885 -- invalid
  Eutaenia sackenii Kennicott, 1859 -- invalid
  Eutaenia sirtalis semifasciatus Cope, 1892 -- invalid
  Eutaenia sumichrasti Cope, 1867 -- invalid
  Eutaenia vagrans Baird and Girard, 1853 -- invalid
  Exiliboa placata Bogert, 1968 -- valid -- Boa-enana oaxaqueña
  Farancia abacura (Holbrook, 1836) -- valid -- Mud Snake, Mudsnake
  Farancia abacura abacura (Holbrook, 1836) -- valid -- Eastern Mud Snake
  Farancia abacura reinwardtii (Schlegel, 1837) -- valid -- Western Mud Snake
  Farancia erytrogramma (Palissot de Beauvois, 1801) -- valid -- Rainbow Snake
  Farancia erytrogramma erytrogramma (Palissot de Beauvois, 1801) -- valid -- Rainbow Snake
  Farancia erytrogramma seminola Neill, 1964 -- valid -- South Florida Rainbow Snake
  Ficimia hardyi Mendoza-Quijano and H. M. Smith, 1993 -- valid
  Ficimia olivacea Gray, 1849 -- valid -- Culebra-naricilla huasteca
  Ficimia publia Cope, 1866 -- valid -- Blotched Hooknose Snake, Culebra-naricilla manchada
  Ficimia publia publia Cope, 1866 -- valid
  Ficimia publia taylori H. M. Smith, 1947 -- valid
  Ficimia ramirezi H. M. Smith and Langebartel, 1949 -- valid -- Culebra-naricilla de Ramírez, Ramirez's Hooknose Snake
  Ficimia ruspator H. M. Smith and Taylor, 1941 -- valid -- Culebra-naricilla guerrerense, Guerreran Hooknose Snake
  Ficimia streckeri Taylor, 1931 -- valid -- Culebra-naricilla mexicana, Mexican Hook-nosed Snake, Mexican Hooknose Snake, Tamaulipan Hook-nosed Snake, Tamaulipan Hooknose Snake
  Ficimia variegata (Günther, 1858) -- valid -- Culebra-naricilla de Tehuantepec, Tehuantepec Hooknose Snake
  Fimbrios klossi M. A. Smith, 1921 -- valid -- Bearded Snake
  Fimbrios smithi Ziegler, David, Miralles, Van Kien and Nguyen Quang Truong, 2008 -- valid
  Garthius chaseni (M. A. Smith, 1931) -- valid -- Chasen's Mountain Pitviper, Mount Kinabalu Pit Viper
  Geagras redimitus Cope, 1876 -- valid -- Culebra-minera de Tehuantepec, Tehuantepec Striped Snake
  Geophis anocularis Dunn, 1920 -- valid -- Culebra-minera de Sierra Mije, Sierra Mije Earth Snake
  Geophis bellus Myers, 2003 -- valid
  Geophis betaniensis Restrepo and Wright, 1987 -- valid -- Betanien Earth Snake
  Geophis bicolor Günther, 1868 -- valid -- Culebra-minera del Altiplano, Mexican Plateau Earth Snake
  Geophis blanchardi Taylor and H. M. Smith, 1939 -- valid -- Blanchard's Earth Snake, Culebra-minera de Blanchard
  Geophis brachycephalus (Cope, 1871) -- valid -- Colombian Earth Snake
  Geophis cancellatus H. M. Smith, 1941 -- valid -- Chiapas Earth Snake, Culebra-minera de Chiapas
  Geophis carinosus Stuart, 1941 -- valid -- Culebra-minera aquillada, Keeled Earth Snake
  Geophis chalybeus (Wagler, 1830) -- valid -- Culebra-minera veracruzana, Veracruz Earth Snake
  Geophis championi Boulenger, 1894 -- valid -- Panamenian Earth Snake
  Geophis damiani Wilson, McCranie and Williams, 1998 -- valid
  Geophis downsi Savage, 1981 -- valid -- Savage's Earth Snake
  Geophis dubius (Peters, 1861) -- valid -- Culebra-minera de la Mesa del Sur, Mesa del Sur Earth Snake
  Geophis duellmani H. M. Smith and Holland, 1969 -- valid -- Culebra-minera de Sierra de Juárez, Sierra Juarez Earth Snake
  Geophis dugesii Bocourt, 1883 -- valid -- Dugès' Earth Snake
  Geophis dugesii aquilonaris Legler, 1959 -- valid
  Geophis dugesii dugesii Bocourt, 1883 -- valid
  Geophis dunni Schmidt, 1932 -- valid -- Dunn's Earth Snake
  Geophis fulvoguttatus Mertens, 1952 -- valid -- Mertens' Earth Snake
  Geophis godmani Boulenger, 1894 -- valid -- Godman's Earth Snake
  Geophis hoffmanni (Peters, 1859) -- valid -- Hoffmann's Earth Snake
  Geophis immaculatus Downs, 1967 -- valid -- Culebra-minera inmaculada, Downs' Earth Snake
  Geophis incomptus Duellman, 1959 -- valid -- Culebra-minera de Sierra Coacolman, Sierra Coalcoman Earth Snake
  Geophis isthmicus (Boulenger, 1894) -- valid -- Culebra-minera de Tehuantepec, Isthmian Earth Snake
  Geophis juarezi Nieto-Montes de Oca, 2003 -- valid
  Geophis juliai Pérez-Higareda, H. M. Smith and López-Luna, 2001 -- valid
  Geophis laticinctus H. M. Smith and Williams, 1963 -- valid -- Culebra-minera de la Mesa Central, Mesa Central Earth Snake
  Geophis laticollaris H. M. Smith, Lynch and Altig, 1965 -- valid -- Widecollar Earth Snake
  Geophis latifrontalis Garman, 1883 -- valid -- Culebra-minera potosina, Potosí Earth Snake
  Geophis latifrontalis latifrontalis Garman, 1883 -- valid
  Geophis latifrontalis semiannulatus H. M. Smith, 1941 -- valid
  Geophis maculiferus Taylor, 1941 -- valid -- Culebra-minera michoacana, Michoacán Earth Snake
  Geophis mutitorques (Cope, 1885) -- valid -- Culebra-minera de tierras altas, Highland Earth Snake
  Geophis nasalis (Cope, 1868) -- valid -- Coffee Earth Snake, culeba-minera del café
  Geophis nephodrymus Townsend and Wilson, 2006 -- valid
  Geophis nigroalbus Boulenger, 1908 -- valid
  Geophis nigrocinctus Duellman, 1959 -- valid -- Black-banded Earth Snake, Culebra-minera rayas negras
  Geophis occabus Pavón-Vázquez, García-Vázquez, Blancas-Hernández and Nieto-Montes de Oca, 2011 -- valid
  Geophis omiltemanus Günther, 1893 -- valid -- Culebra-minera guerrerense, Guerreran Earth Snake
  Geophis petersii Boulenger, 1894 -- valid -- Peters' Earth Snake
  Geophis pyburni Campbell and Murphy, 1977 -- valid -- Culebra-minadora de Pyburn, Pyburn's Earth Snake
  Geophis rhodogaster (Cope, 1868) -- valid -- Rosebelly Earth Snake
  Geophis rostralis (Jan, 1865) -- valid
  Geophis russatus H. M. Smith and Williams, 1966 -- valid -- Culebra-minadora roja, Red Earth Snake
  Geophis ruthveni Werner, 1925 -- valid -- Ruthven's Earth Snake
  Geophis sallaei Boulenger, 1894 -- valid -- Culebra-minadora de Salle, Sallae's Earth Snake
  Geophis semidoliatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Coral Earth Snake, Culebra-minadora coralillo
  Geophis sieboldi (Jan, 1862) -- valid -- Culebra-miandora de Siebold, Siebold's Earth Snake
  Geophis talamancae Lips and Savage, 1994 -- valid
  Geophis tarascae Hartweg, 1959 -- valid -- Culebra-miandora tarasca, Tarascan Earth Snake
  Geophis tectus Savage and Watling, 2008 -- valid
  Geophis turbidus Pavón-Vázquez, Canseco-Márquez and Nieto-Montes de Oca, 2013 -- valid
  Geophis zeledoni Taylor, 1954 -- valid
  Gloydius blomhoffii (H. Boie, 1826) -- valid -- Mamushi
  Gloydius blomhoffii blomhoffii (H. Boie, 1826) -- valid
  Gloydius blomhoffii dubitatus (Gloyd, 1977) -- valid
  Gloydius brevicaudus (Stejneger, 1907) -- valid
  Gloydius brevicaudus brevicaudus (Stejneger, 1907) -- valid
  Gloydius brevicaudus siniticus (Gloyd, 1977) -- valid
  Gloydius halys (Pallas, 1776) -- valid -- Halys Pit Viper
  Gloydius halys affinis (Gray, 1849) -- valid
  Gloydius halys boehmei (Nilson, 1983) -- valid -- Böhme's Pitviper
  Gloydius halys caraganus (Eichwald, 1831) -- valid -- Karaganda Pitviper
  Gloydius halys caucasicus (Nikolsky, 1916) -- valid -- Caucasian Pitviper
  Gloydius halys cognatus (Gloyd, 1977) -- valid -- Alashan Pitviper
  Gloydius halys halys (Pallas, 1776) -- valid -- Siberian Pit Viper
  Gloydius halys mogoi (Bour, 1993) -- valid
  Gloydius halys stejnegeri (Rendahl, 1933) -- valid -- Gobi Pitviper
  Gloydius himalayanus (Günther, 1864) -- valid -- Himalayan Pitviper
  Gloydius intermedius (Strauch, 1868) -- valid -- Central Asian Pitviper
  Gloydius lijianlii Jiang and Zhao, 2009 -- valid
  Gloydius liupanensis Liu, Song and Luo, 1989 -- valid
  Gloydius monticola (Werner, 1922) -- valid -- Likiang Pitviper
  Gloydius saxatilis (Emelianov, 1937) -- valid
  Gloydius saxatilis changdaoensis Li, 1999 -- valid
  Gloydius saxatilis saxatilis (Emelianov, 1937) -- valid
  Gloydius shedaoensis (Zhao, 1979) -- valid -- Shedao Island Pitviper
  Gloydius shedaoensis qianshanensis Li, 1999 -- valid
  Gloydius shedaoensis shedaoensis (Zhao, 1979) -- valid
  Gloydius strauchi (Bedriaga, 1912) -- valid -- Strauch's Pitviper
  Gloydius tsushimaensis (Isogawa, Moriya and Mitsui, 1994) -- valid -- Tsushima Island Pitviper
  Gloydius ussuriensis (Emelianov, 1929) -- valid -- Ussuri Mamushi
  Gomesophis brasiliensis (Gomes, 1918) -- valid -- Brazilian Burrowing Snake
  Gongylosoma baliodeirus (F. Boie, 1827) -- valid -- Boie's Smooth Snake, Striped Ringneck
  Gongylosoma baliodeirus baliodeirus (F. Boie, 1827) -- valid
  Gongylosoma baliodeirus cochranae (Taylor, 1962) -- valid
  Gongylosoma longicaudum (Peters, 1871) -- valid -- Long-tailed Ringneck, Peters' Smooth Snake
  Gongylosoma mukutense Grismer, Das and Leong, 2003 -- valid -- Mukut Smooth Snake
  Gongylosoma nicobariensis (Stoliczka, 1870) -- valid
  Gongylosoma scriptum (Theobald, 1868) -- valid -- Common Ringneck
  Gonionotophis brussauxi (Mocquard, 1889) -- valid -- Mocquard's African Ground Snake
  Gonionotophis brussauxi brussauxi (Mocquard, 1889) -- valid
  Gonionotophis brussauxi prigoginei Laurent, 1956 -- valid
  Gonionotophis capensis (A. Smith, 1847) -- valid -- Cape File Snake
  Gonionotophis crossi (Boulenger, 1895) -- valid -- African File Snake, Crosse's File Snake
  Gonionotophis egbensis (Dunger, 1966) -- valid -- Dunger's File Snake
  Gonionotophis gabouensis (Trape and Mané, 2005) -- valid -- Gabou File Snake
  Gonionotophis grantii (Günther, 1863) -- valid -- Savanna Lesser File Snake
  Gonionotophis guirali (Mocquard, 1887) -- valid -- Mocquard's File Snake
  Gonionotophis klingi Matschie, 1893 -- valid -- Matschie's African Ground Snake
  Gonionotophis laurenti (de Witte, 1959) -- valid
  Gonionotophis nyassae (Günther, 1888) -- valid -- Black File Snake, Dwarf File Snake
  Gonionotophis poensis (A. Smith, 1849) -- valid -- Western Forest File Snake
  Gonionotophis savorgnani (Mocquard, 1887) -- valid -- Congo File Snake
  Gonionotophis stenophthalmus (Mocquard, 1887) -- valid -- Small-eyed File Snake
  Gonionotophis vernayi (Bogert, 1940) -- valid -- Angola File Snake
  Gonyophis margaritatus (Peters, 1871) -- invalid
  Gonyosoma jansenii (Bleeker, 1859) -- valid -- Celebes Black-tailed Ratsnake
  Gonyosoma oxycephalum (F. Boie, 1827) -- valid -- Red-tailed Green Ratsnake
  Grayia caesar (Günther, 1863) -- valid -- Caesar's African Water Snake
  Grayia ornata (Bocage, 1866) -- valid -- Ornate African Water Snake
  Grayia smithii (Leach, 1818) -- valid -- Smith's African Water Snake
  Grayia tholloni Mocquard, 1897 -- valid -- Tholloni's African Water Snake
  Gyalopion canum (Cope, 1860) -- valid -- Chihuahuan Hook-nosed Snake, Culebra-nariz ganchuda de Chihuahua, Western Hook-nosed Snake, Western Hooknose Snake
  Gyalopion quadrangulare (Günther, 1893) -- valid -- Culebra-nariz ganchuda de desierto, Desert Hooknose Snake, Thornscrub Hook-nosed Snake, Thornscrub Hooknose Snake
  Haitiophis anomalus (Peters, 1863) -- valid -- Hispaniola Racer
  Haldea Baird and Girard, 1853 -- valid
  Haldea striatula (Linnaeus, 1766) -- valid -- Rough Earth Snake, Rough Earthsnake
  Hapsidophrys lineatus Fischer, 1856 -- valid -- Black-lined Green Snake
  Hapsidophrys principis (Boulenger, 1906) -- valid
  Hebius Thompson, 1913 -- valid
  Hebius andreae (Ziegler and Quyet, 2006) -- valid -- Andrea's Keelback
  Hebius arquus (David and Vogel, 2010) -- valid
  Hebius atemporale (Bourret, 1934) -- valid -- Tonkin Keelback
  Hebius beddomei (Günther, 1864) -- valid -- Beddome's Keelback, Nilgiri Keelback
  Hebius bitaeniatum (Wall, 1925) -- valid -- Kutkai Keelback
  Hebius boulengeri (Gressitt, 1937) -- valid -- Boulenger's Keelback, Tai-yong Keelback
  Hebius celebicum (W. C. H. Peters and Doria, 1878) -- valid -- Sulawesi Keelback
  Hebius clerki (Wall, 1925) -- valid -- Yunnan Keelback
  Hebius concelarum (Malnate, 1963) -- valid
  Hebius craspedogaster (Boulenger, 1899) -- valid -- Kuatun Keelback
  Hebius deschauenseei (Taylor, 1934) -- valid -- Deschauensee's Keelback, Northern Keelback
  Hebius flavifrons (Boulenger, 1887) -- valid -- Sabah Keelback
  Hebius frenatum (Dunn, 1923) -- valid
  Hebius groundwateri (M. A. Smith, 1922) -- valid -- Groundwater's Keelback
  Hebius inas (Laidlaw, 1901) -- valid -- Malayan Mountain Keelback
  Hebius ishigakiense (Malnate and Munsterman, 1960) -- valid -- Yaeyama Keelback
  Hebius johannis (Boulenger, 1908) -- valid -- Johann's Keelback
  Hebius kerinciense (David and Das, 2003) -- valid
  Hebius khasiense (Boulenger, 1890) -- valid -- Khasi Hills Keelback, Khasi Keelback
  Hebius leucomystax (David, Bain, T. Q. Nguyen, Orlov, Vogel, T. N. Vu and Ziegler, 2007) -- valid -- White-lipped Keelback
  Hebius metusium (Inger, Zhao, Shaffer and Wu, 1990) -- valid -- Wa Shan Keelback
  Hebius miyajimae (Maki, 1931) -- valid -- Maki's Keelback
  Hebius modestum (Günther, 1875) -- valid -- Modest Keelback
  Hebius monticola (Jerdon, 1853) -- valid -- Wynad Keelback
  Hebius nicobariense (Sclater, 1891) -- valid -- Nicobar Island Keelback
  Hebius octolineatum (Boulenger, 1904) -- valid -- Eight-lined Keelback
  Hebius optatum (Hu and Zhao, 1966) -- valid -- Mount Omei Keelback
  Hebius parallelum (Boulenger, 1890) -- valid -- Yunnan Keelback
  Hebius pealii (Sclater, 1891) -- valid -- Assam Keelback
  Hebius petersii (Boulenger, 1893) -- valid -- Peters' Keelback
  Hebius popei (Schmidt, 1925) -- valid -- Pope's Keelback
  Hebius pryeri (Boulenger, 1887) -- valid -- Pryer's Keelback
  Hebius sanguineum (Smedley, 1931) -- valid -- Cameron Highlands Keelback
  Hebius sarasinorum (Boulenger, 1896) -- valid -- Sarasin's Keelback
  Hebius sarawacense (Günther, 1872) -- valid -- Sarawak Keelback
  Hebius sauteri (Boulenger, 1909) -- valid -- Kosempo Keelback
  Hebius taronense (M. A. Smith, 1940) -- valid -- Kachin Keelback
  Hebius venningi (Wall, 1910) -- valid -- Chin Hills Keelback
  Hebius vibakari (H. Boie, 1826) -- valid -- Japanese Keelback
  Hebius vibakari danjoensis (Toriba, 1986) -- valid
  Hebius vibakari ruthveni (Van Denburgh, 1923) -- valid
  Hebius vibakari vibakari (H. Boie, 1826) -- valid
  Hebius viperinum (Schenkel, 1901) -- valid
  Hebius xenura (Wall, 1907) -- valid -- Wall's Keelback
  Helicops alleni Garman, 1874 -- invalid
  Helicops angulatus (Linnaeus, 1758) -- valid -- Brown-banded Watersnake, Mountain Keelback
  Helicops apiaka Kawashita-Ribeiro, Ávila and Morais, 2013 -- valid
  Helicops bangweolicus Mertens, 1936 -- invalid
  Helicops carinicaudus (Wied-Neuwied, 1825) -- valid -- Wied's Keelback
  Helicops carinicaudus carinicaudus (Wied-Neuwied, 1825) -- valid
  Helicops carinicaudus triserialis Lindholm in Lampe and Lindholm, 1902 -- valid
  Helicops danieli Amaral, 1938 -- valid -- Daniel's Keelback
  Helicops gomesi Amaral, 1921 -- valid -- Sao Paulo Keelback
  Helicops hagmanni Roux, 1910 -- valid -- Hagmann's Keelback
  Helicops infrataeniatus Jan, 1865 -- valid
  Helicops leopardinus (Schlegel, 1837) -- valid -- Leopard Keelback
  Helicops modestus Günther, 1861 -- valid -- Olive Keelback
  Helicops pastazae Shreve, 1934 -- valid -- Shreve's Keelback
  Helicops petersi Rossman, 1976 -- valid -- Spiral Keelback
  Helicops polylepis Günther, 1861 -- valid -- Norman's Keelback
  Helicops scalaris Jan, 1865 -- valid -- Hoge's Keelback, Ladder Keelback
  Helicops tapajonicus Da Frota, 2005 -- valid
  Helicops trivittatus (Gray, 1849) -- valid -- Equatorial Keelback
  Helicops yacu Rossman and Dixon, 1975 -- valid -- Peru Keelback
  Helicopsoides typicus Mocquard, 1890 -- invalid
  Helophis de Witte & Laurent, 1942 -- valid
  Helophis schoutedeni (de Witte, 1942) -- valid -- Schouteden's Sun Snake
  Hemerophis socotrae (Günther, 1881) -- valid -- Socotran Racer
  Hemirhagerrhis hildebrandtii (Peters, 1878) -- valid -- Kenyan Bark Snake, Northern Bark Snake
  Hemirhagerrhis kelleri Boettger, 1893 -- valid -- Keller's Bark Snake, Striped Bark Snake
  Hemirhagerrhis nototaenia (Günther, 1864) -- valid -- Eastern Bark Snake, Mopane Snake, Southeastern Bark Snake
  Hemirhagerrhis viperina (Bocage, 1873) -- valid -- Western Bark Snake
  Hemorrhois algirus (Jan, 1863) -- valid -- Algerian Whip Snake
  Hemorrhois algirus algirus (Jan, 1863) -- valid
  Hemorrhois algirus intermedius (Werner, 1929) -- valid
  Hemorrhois hippocrepis (Linnaeus, 1758) -- valid -- Horseshoe Snake, Horseshoe Whip Snake
  Hemorrhois hippocrepis hippocrepis (Linnaeus, 1758) -- valid
  Hemorrhois hippocrepis nigrescens (Cattaneo, 1985) -- valid
  Hemorrhois nummifer (Reuss, 1834) -- valid -- Asian Racer, Coin-Marked Snake
  Hemorrhois ravergieri (Ménétries, 1832) -- valid -- Spotted Whip Snake
  Hemorrhois ravergieri cernovi (Mertens, 1952) -- valid
  Hemorrhois ravergieri ravergieri (Ménétries, 1832) -- valid
  Herpetoreas Günther, 1860 -- valid
  Herpetoreas burbrinki Guo, Zhu, Liu, Zhang, Li, Huang and Pyron, 2014 -- valid -- Burbrink's Keelback
  Herpetoreas platyceps (Blyth, 1854) -- valid -- Himalayan Keelback
  Herpetoreas sieboldii Günther, 1860 -- valid -- Siebold's Keelback, Sikkim Keelback
  Heterodon gloydi Edgren, 1952 -- valid -- Dusty Hognose Snake
  Heterodon kennerlyi Kennicott, 1860 -- valid -- Mexican Hog-nose Snake, Mexican Hog-nosed Snake
  Heterodon nasicus Baird and Girard, 1852 -- valid -- Culebra-nariz de cerdo occidental, Plains Hognose Snake, Western Hog-nosed Snake, Western Hognose Snake
  Heterodon platirhinos Latreille, 1801 -- valid -- Eastern Hog-nosed Snake, Eastern Hognose Snake
  Heterodon simus (Linnaeus, 1766) -- valid -- Southern Hog-nosed Snake, Southern Hognose Snake
  Heteroliodon fohy Glaw, Vences and Nussbaum, 2005 -- valid
  Heteroliodon lava Nussbaum and Raxworthy, 2000 -- valid
  Heteroliodon occipitalis (Boulenger, 1896) -- valid
  Hierophis andreanus (Werner, 1917) -- valid -- Andreas' Racer
  Hierophis cypriensis (Schätti, 1985) -- invalid
  Hierophis gemonensis (Laurenti, 1768) -- valid -- Balkan Racer, Balkan Whip Snake
  Hierophis spinalis (Peters, 1866) -- invalid
  Hierophis viridiflavus (Lacépède, 1789) -- valid -- Dark Green Snake, Green Whip Snake, Western Whip Snake
  Hierophis viridiflavus carbonarius (Bonaparte, 1833) -- valid
  Hierophis viridiflavus viridiflavus (Lacépède, 1789) -- valid
  Hologerrhum Günther, 1858 -- valid
  Hologerrhum dermali Brown, Leviton, Ferner and Sison, 2001 -- valid
  Hologerrhum philippinum Günther, 1858 -- valid -- Philippine Stripe-lipped Snake
  Hormonotus modestus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Uganda House Snake, Yellow Forest Snake
  Hydrablabes Boulenger, 1891 -- valid
  Hydrablabes periops (Günther, 1872) -- valid -- Olive Small-eyed Snake
  Hydrablabes praefrontalis (Mocquard, 1890) -- valid -- Mocquard's Small-eyed Snake
  Hydraethiops Günther, 1872 -- valid
  Hydraethiops laevis Boulenger, 1904 -- valid
  Hydraethiops melanogaster Günther, 1872 -- valid -- Blackbelly Snake
  Hydrodynastes bicinctus (Herrmann, 1804) -- valid -- Herrmann's Water Snake
  Hydrodynastes bicinctus bicinctus (Herrmann, 1804) -- valid
  Hydrodynastes bicinctus schultzi Hoge, 1966 -- valid
  Hydrodynastes gigas (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- False Water Cobra
  Hydrodynastes melanogigas Franco, Fernandes and Bentim, 2007 -- valid
  Hydromorphus concolor Peters, 1859 -- valid -- Costa Rica Water Snake
  Hydromorphus dunni Slevin, 1942 -- valid -- Dunn's Water Snake
  Hydrops caesurus Scrocchi, Ferreira, Giraudo, Avila and Motte, 2005 -- valid
  Hydrops martii (Wagler, 1824) -- valid -- Amazon Water Snake
  Hydrops triangularis (Wagler, 1824) -- valid -- Triangle Water Snake
  Hydrus piscator Schneider, 1799 -- invalid
  Hypnale hypnale (Merrem, 1820) -- valid -- Hump-nosed Moccasin
  Hypnale nepa (Laurenti, 1768) -- valid -- Sri Lanka Humpnose Viper
  Hypnale zara (Gray, 1849) -- valid
  Hypoptophis wilsonii Boulenger, 1908 -- valid -- African Bighead Snake, Wedge-Snouted Burrowing Snake
  Hypsiglena affinis Boulenger, 1894 -- valid -- Rio Grande de Santiago Nightsnake
  Hypsiglena chlorophaea Cope, 1860 -- valid -- Desert Nightsnake, Sonoran Nightsnake
  Hypsiglena chlorophaea catalinae Tanner, 1966 -- invalid -- Isla Santa Catalina Nightsnake
  Hypsiglena chlorophaea chlorophaea Cope, 1860 -- valid -- Sonoran Nightsnake
  Hypsiglena chlorophaea deserticola Tanner, 1946 -- valid -- Great Basin Nightsnake
  Hypsiglena chlorophaea loreala Tanner, 1946 -- valid -- Mesa Verde Nightsnake
  Hypsiglena chlorophaea tiburonensis Tanner, 1981 -- valid -- Isla Tiburon Nightsnake
  Hypsiglena jani (Dugès, 1865) -- valid -- Chihuahuan Nightsnake, San Luis Potosi Nightsnake
  Hypsiglena jani dunklei Taylor, 1939 -- valid -- Tamaulipas Nightsnake
  Hypsiglena jani jani (Dugès, 1865) -- valid -- San Luis Potosi Nightsnake
  Hypsiglena jani texana Stejneger, 1893 -- valid -- Texas Night Snake, Texas Nightsnake
  Hypsiglena ochrorhyncha Cope, 1860 -- invalid
  Hypsiglena ochrorhyncha unaocularis Tanner, 1946 -- invalid -- Islas Revillagigedo Nightsnake
  Hypsiglena ochrorhynchus baueri Zweifel, 1958 -- valid -- Isla Cedros Nightsnake
  Hypsiglena ochrorhynchus gularis Tanner, 1954 -- valid -- Isla Partida Norte Nightsnake
  Hypsiglena ochrorhynchus martinensis Tanner and Banta, 1962 -- valid -- Isla San Martin Nightsnake
  Hypsiglena ochrorhynchus nuchalata Tanner, 1943 -- valid -- California Night Snake, California Nightsnake
  Hypsiglena ochrorhynchus ochrorhynchus Cope, 1860 -- valid -- Cape Nightsnake
  Hypsiglena ochrorhynchus tortugaensis Tanner, 1946 -- valid -- Isla Tortuga Nightsnake
  Hypsiglena ochrorhynchus venusta Mocquard, 1899 -- valid -- Magdalena Nightsnake
  Hypsiglena slevini Tanner, 1943 -- valid -- Baja California Night Snake, Baja California Nightsnake, Culebra-nocturna de Baja California
  Hypsiglena slevini marcosensis Ottley and Tanner, 1978 -- valid
  Hypsiglena slevini slevini Tanner, 1943 -- valid
  Hypsiglena tanzeri Dixon and Lieb, 1972 -- valid -- Rio Verde Nightsnake, Tanzer's Night Snake
  Hypsiglena torquata (Günther, 1860) -- valid -- Culebra-nocturna ojo de gato, Night Snake, Nightsnake, Sinaloan Nightsnake
  Hypsiglena torquata torquata (Günther, 1860) -- invalid
  Hypsiglena torquata tortugaensis Tanner, 1946 -- invalid
  Hypsirhynchus ater (Gosse, 1851) -- valid -- Jamaica Racer
  Hypsirhynchus callilaemus (Gosse, 1851) -- valid -- Jamaican Red Groundsnake
  Hypsirhynchus ferox Günther, 1858 -- valid -- Hispaniola Cat-eyed Snake
  Hypsirhynchus ferox exedrus Schwartz, 1971 -- valid
  Hypsirhynchus ferox ferox Günther, 1858 -- valid
  Hypsirhynchus ferox paracrousis Schwartz, 1971 -- valid
  Hypsirhynchus funereus (Cope, 1862) -- valid -- Jamaican Black Groundsnake
  Hypsirhynchus melanichnus (Cope, 1862) -- valid -- La Vega Racer
  Hypsirhynchus parvifrons (Cope, 1862) -- valid -- Cope's Antilles Snake, Hispaniolan Black Racer
  Hypsirhynchus parvifrons alleni (Dunn, 1920) -- valid
  Hypsirhynchus parvifrons lincolni (Cochran, 1941) -- valid
  Hypsirhynchus parvifrons niger (Dunn, 1920) -- valid
  Hypsirhynchus parvifrons paraniger (Thomas And Schwartz, 1965) -- valid
  Hypsirhynchus parvifrons parvifrons (Cope, 1862) -- valid
  Hypsirhynchus parvifrons protenus (Jan, 1867) -- valid
  Hypsirhynchus parvifrons rosamondae (Cochran, 1934) -- valid
  Hypsirhynchus parvifrons stygius (Thomas And Schwartz, 1965) -- valid
  Hypsirhynchus parvifrons tortuganus (Dunn, 1920) -- valid
  Hypsirhynchus polylepis (Buden, 1966) -- valid -- Jamaican Long-tailed Groundsnake
  Hypsirhynchus scalaris Cope, 1863 -- valid -- Tiburon Hognosed Racer
  Ialtris agyrtes Schwartz and Rossman, 1976 -- valid -- Barreras Fanged Snake
  Ialtris dorsalis (Günther, 1858) -- valid -- Brown Fanged Snake
  Ialtris haetianus (Cochran, 1935) -- valid -- Haitian Ground Snake
  Ialtris haetianus haetianus (Cochran, 1935) -- valid
  Ialtris haetianus perfector (Schwartz and Thomas, 1965) -- valid
  Ialtris haetianus vaticinata (Schwartz, 1970) -- valid
  Ialtris parishi Cochran, 1932 -- valid -- Parish's Fanged Snake
  Iguanognathus Boulenger, 1898 -- valid
  Iguanognathus werneri Boulenger, 1898 -- valid -- Spatula-tooth Snake
  Imantodes cenchoa (Linnaeus, 1758) -- valid -- Blunt-headed Treesnake, Blunthead Tree Snake, Blunthead Treesnake, Culebra-cordelilla chata, Fiddle-string Snake
  Imantodes cenchoa cenchoa (Linnaeus, 1758) -- invalid -- Fiddle-string Snake
  Imantodes cenchoa leucomelas (Cope, 1861) -- invalid
  Imantodes cenchoa semifasciatus (Cope, 1894) -- invalid
  Imantodes chocoensis Torres-Carvajal, Yánez-Muñoz, Quirola, Smith and Almendáriz, 2012 -- valid -- Chocoan Blunt-headed Vine Snake
  Imantodes gemmistratus (Cope, 1861) -- valid -- Central American Tree Snake, Culebra-cordelilla centroamericana
  Imantodes gemmistratus gemmistratus (Cope, 1861) -- valid
  Imantodes gemmistratus gracillimus (Günther, 1895) -- valid
  Imantodes gemmistratus latistratus (Cope, 1887) -- valid
  Imantodes gemmistratus luciodorsus Oliver, 1942 -- valid
  Imantodes gemmistratus oliveri H. M. Smith, 1942 -- valid
  Imantodes gemmistratus splendidus (Günther, 1895) -- valid
  Imantodes inornatus (Boulenger, 1896) -- valid -- Western Tree Snake
  Imantodes lentiferus (Cope, 1894) -- valid -- Amazon Basin Tree Snake
  Imantodes phantasma Myers, 1982 -- valid -- Phantasma Tree Snake
  Imantodes tenuissimus (Cope, 1867) -- valid -- Culebra-cordelilla yucateca, Yucatán Blunthead Snake
  Inyoka swazicus (Schaefer, 1970) -- valid -- Swazi Rock Snake, Swaziland House Snake
  Isanophis David, Pauwels, T. Q. Nguyen and Vogel, 2015 -- valid
  Isanophis boonsongi (Taylor and Elbel, 1958) -- valid -- Boomsong's Stream Snake
  Ithycyphus blanci Domergue, 1988 -- valid
  Ithycyphus goudoti (Schlegel, 1837) -- valid -- Forest Night Snake
  Ithycyphus miniatus (Schlegel, 1837) -- valid -- Cinnabar Malagasy Night Snake, Cinnabar Malagasy Vinesnake
  Ithycyphus oursi Domergue, 1986 -- valid
  Ithycyphus perineti Domergue, 1986 -- valid
  Katophis plumbea Macleay, 1877 -- invalid
  Lachesis acrochorda (Garcia, 1896) -- valid
  Lachesis melanocephala Solórzano and Cerdas, 1986 -- valid -- Black-headed Bushmaster
  Lachesis muta (Linnaeus, 1766) -- valid -- Bushmaster, South American Bushmaster
  Lachesis stenophrys Cope, 1876 -- valid -- Central American Bushmaster
  Lampropeltis alterna (Brown, 1901) -- valid -- Culebra-real bandas grises, Gray-banded Kingsnake, Grey-banded Kingsnake
  Lampropeltis californiae (Blainville, 1835) -- valid -- California Kingsnake
  Lampropeltis calligaster (Harlan, 1827) -- valid -- Prairie Kingsnake, Yellow-bellied Kingsnake
  Lampropeltis calligaster calligaster (Harlan, 1827) -- valid -- Prairie Kingsnake
  Lampropeltis calligaster occipitolineata Price, 1987 -- valid -- South Florida Mole Snake
  Lampropeltis calligaster rhombomaculata (Holbrook, 1840) -- valid -- Mole Kingsnake
  Lampropeltis elapsoides (Holbrook, 1838) -- valid -- Scarlet Kingsnake, Scarlet Milksnake
  Lampropeltis extenuata (Brown, 1890) -- valid -- Short-tailed Snake
  Lampropeltis getula (Linnaeus, 1766) -- valid -- Common Kingsnake, Culebra-real común
  Lampropeltis holbrooki Stejneger, 1902 -- valid -- Speckled Kingsnake
  Lampropeltis knoblochi Taylor, 1940 -- valid -- Chihuahuan Mountain Kingsnake, Knobloch's Mountain Kingsnake
  Lampropeltis mexicana (Garman, 1884) -- valid -- Culebra-real potosina, Gray-banded Kingsnake, Mexican Kingsnake
  Lampropeltis mexicana mexicana (Garman, 1884) -- valid
  Lampropeltis mexicana thayeri Loveridge, 1924 -- valid
  Lampropeltis nigra (Yarrow, 1882) -- valid -- Black Kingsnake
  Lampropeltis pyromelana (Cope, 1867) -- valid -- Culebra-real sonorense, Sonoran Mountain Kingsnake
  Lampropeltis pyromelana infralabialis Tanner, 1953 -- valid -- Utah Mountain Kingsnake
  Lampropeltis pyromelana pyromelana (Cope, 1867) -- valid -- Arizona Mountain Kingsnake, Huachuca Mountain Kingsnake
  Lampropeltis ruthveni Blanchard, 1920 -- valid -- Culebra-real de Ruthven, Ruthvens Kingsnake
  Lampropeltis splendida (Baird and Girard, 1853) -- valid -- Desert Kingsnake
  Lampropeltis triangulum (Lacépède, 1789) -- valid -- couleuvre tachetée, Culebra-real coralillo, Eastern Milk Snake, Eastern Milksnake
  Lampropeltis triangulum amaura Cope, 1861 -- invalid -- Louisiana Milk Snake
  Lampropeltis triangulum andesiana Williams, 1978 -- invalid
  Lampropeltis triangulum annulata Kennicott, 1861 -- invalid -- Mexican Milk Snake
  Lampropeltis triangulum arcifera (Werner, 1903) -- invalid
  Lampropeltis triangulum blanchardi Stuart, 1935 -- invalid
  Lampropeltis triangulum campbelli Quinn, 1983 -- invalid
  Lampropeltis triangulum celaenops Stejneger, 1903 -- invalid -- New Mexico Milk Snake
  Lampropeltis triangulum conanti Williams, 1978 -- invalid
  Lampropeltis triangulum dixoni Quinn, 1983 -- invalid
  Lampropeltis triangulum gaigae Dunn, 1937 -- invalid
  Lampropeltis triangulum gentilis (Baird and Girard, 1853) -- invalid -- Central Plains Milk Snake
  Lampropeltis triangulum hondurensis Williams, 1978 -- invalid
  Lampropeltis triangulum micropholis Cope, 1860 -- invalid
  Lampropeltis triangulum nelsoni Blanchard, 1920 -- invalid
  Lampropeltis triangulum oligozona (Bocourt, 1886) -- invalid
  Lampropeltis triangulum sinaloae Williams, 1978 -- invalid
  Lampropeltis triangulum smithi Williams, 1978 -- invalid
  Lampropeltis triangulum stuarti Williams, 1978 -- invalid
  Lampropeltis triangulum syspila (Cope, 1889) -- invalid -- Red Milk Snake
  Lampropeltis triangulum taylori Tanner and Loomis, 1957 -- invalid -- Utah Milk Snake
  Lampropeltis triangulum triangulum (Lacépède, 1789) -- invalid -- Eastern Milk Snake
  Lampropeltis webbi Bryson, Dixon and Lazcano, 2005 -- valid
  Lampropeltis zonata (Lockington ex Blainville, 1876) -- valid -- California Mountain Kingsnake, Culebra-real californiana
  Lamprophiidae Fitzinger, 1843 -- valid
  Lamprophis abyssinicus Mocquard, 1906 -- valid -- Abyssinian House Snake, Ethiopian House Snake
  Lamprophis aurora (Linnaeus, 1758) -- valid -- Aurora House Snake
  Lamprophis capensis (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Lamprophis erlangeri (Sternfeld, 1908) -- valid
  Lamprophis fiskii Boulenger, 1887 -- valid -- Fisk's House Snake
  Lamprophis fuscus Boulenger, 1893 -- valid -- Yellow-bellied House Snake
  Lamprophis geometricus (Schlegel, 1837) -- valid -- Seychelles House Snake
  Lamprophis guttatus (A. Smith, 1843) -- valid -- Spotted House Snake
  Langaha alluaudi Mocquard, 1901 -- valid -- Southern Leafnose Snake
  Langaha madagascariensis Bonaterre, 1790 -- valid
  Langaha pseudoalluaudi Domergue, 1988 -- valid
  Leioheterodon geayi Mocquard, 1905 -- valid
  Leioheterodon madagascariensis (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Leioheterodon modestus (Günther, 1863) -- valid
  Lepidognathus rugosus Lidth de Jeude, 1890 -- invalid
  Leptodeira annulata (Linnaeus, 1758) -- valid -- Banded Cat-eyed Snake, Culebra-ojo de gato bandada
  Leptodeira annulata annulata (Linnaeus, 1758) -- valid
  Leptodeira annulata ashmeadii (Hallowell, 1845) -- valid
  Leptodeira annulata pulchriceps Duellman, 1958 -- valid
  Leptodeira annulata rhombifera Günther, 1872 -- invalid
  Leptodeira bakeri Ruthven, 1936 -- valid -- Baker's Cat-eyed Snake
  Leptodeira frenata (Cope, 1886) -- valid -- Culebra-ojo de gato de selva, Rainforest Cat-eyed Snake
  Leptodeira frenata frenata (Cope, 1886) -- valid
  Leptodeira frenata malleisi Dunn and Stuart, 1935 -- valid
  Leptodeira frenata yucatanensis (Cope, 1887) -- valid
  Leptodeira maculata (Hallowell, 1861) -- valid -- Culebra-ojo de gato del suroeste, Southwestern Cat-eyed Snake
  Leptodeira nigrofasciata Günther, 1868 -- valid -- Black-banded Cat-eyed Snake, Culebra-ojo de gato cabeza negra
  Leptodeira polysticta Günther, 1885 -- valid
  Leptodeira punctata (Peters, 1866) -- valid -- Culebra-ojo de gato occidental, Western Cat-eyed Snake
  Leptodeira rubricata (Cope, 1893) -- valid
  Leptodeira septentrionalis (Kennicott in Baird, 1859) -- valid -- Cat-eyed Snake, Culebra-ojo de gato norteña o manchada, Northern Cat-eyed Snake
  Leptodeira splendida Günther, 1895 -- valid -- Culebra-ojo de gato espléndida, Splendid Cat-eyed Snake
  Leptodeira splendida bressoni Taylor, 1938 -- valid
  Leptodeira splendida ephippiata H. M. Smith and Tanner, 1944 -- valid
  Leptodeira splendida splendida Günther, 1895 -- valid
  Leptodeira uribei (Bautista and H. M. Smith, 1992) -- valid -- Uribe's False Cat-eyed Snake
  Leptodrymus pulcherrimus (Cope, 1874) -- valid -- Striped Lowland Snake
  Leptophis ahaetulla (Linnaeus, 1758) -- valid -- Culebra-perico verde, Giant Parrot Snake, Parrot Snake
  Leptophis ahaetulla ahaetulla (Linnaeus, 1758) -- valid
  Leptophis ahaetulla bocourti Boulenger, 1898 -- valid
  Leptophis ahaetulla bolivianus Oliver, 1942 -- valid
  Leptophis ahaetulla chocoensis Oliver, 1942 -- valid
  Leptophis ahaetulla liocercus (Wied-Neuwied, 1824) -- valid
  Leptophis ahaetulla marginatus (Cope, 1862) -- valid
  Leptophis ahaetulla nigromarginatus (Günther, 1866) -- valid
  Leptophis ahaetulla occidentalis (Günther, 1859) -- valid
  Leptophis ahaetulla ortonii Cope, 1876 -- valid
  Leptophis ahaetulla praestans (Cope, 1868) -- valid
  Leptophis coeruleodorsus Oliver, 1942 -- valid -- Oliver's Parrot Snake
  Leptophis cupreus (Cope, 1868) -- valid -- Copper Parrot Snake
  Leptophis depressirostris (Cope, 1861) -- valid -- Cope's Parrot Snake
  Leptophis diplotropis (Günther, 1872) -- valid -- Culebra-perico gargantilla, Pacific Coast Parrot Snake
  Leptophis diplotropis diplotropis (Günther, 1872) -- valid
  Leptophis diplotropis forreri H. M. Smith, 1943 -- valid
  Leptophis haileyi Murphy, Charles, Lehtinen and Koeller, 2013 -- valid
  Leptophis mexicanus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Culebra-perico mexicana, Mexican Parrot Snake
  Leptophis mexicanus hoeversi Henderson, 1976 -- valid
  Leptophis mexicanus mexicanus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Leptophis mexicanus septentrionalis Mertens, 1972 -- valid
  Leptophis mexicanus yucatanensis Oliver, 1942 -- valid
  Leptophis modestus (Günther, 1872) -- valid -- Cloud Forest Parrot Snake, Culebra-perico de niebla
  Leptophis nebulosus Oliver, 1942 -- valid -- Oliver's Parrot Snake
  Leptophis riveti Despax, 1910 -- valid -- Despax's Parrot Snake
  Leptophis stimsoni Harding, 1995 -- valid -- Gray Lora
  Lichanura orcutti Stejneger, 1889 -- valid
  Lichanura trivirgata Cope, 1861 -- valid -- Boa solocuate, Rosy Boa
  Limnophis Günther, 1865 -- valid
  Limnophis bangweolicus (Mertens, 1936) -- valid -- Bangweulu Water Snake, Eastern Striped Swamp Snake
  Limnophis bicolor Günther, 1865 -- valid -- Bicolored Swamp Snake
  Liodytes Cope, 1885 -- valid
  Liodytes alleni (Garman, 1874) -- valid -- Striped Crayfish Snake
  Liodytes pygaea (Cope, 1871) -- valid -- Black Swamp Snake
  Liodytes pygaea cyclas (Dowling, 1950) -- valid -- South Florida Swamp Snake
  Liodytes pygaea paludis (Dowling, 1950) -- valid -- Carolina Swamp Snake
  Liodytes pygaea pygaea (Cope, 1871) -- valid -- North Florida Swamp Snake
  Liodytes rigida (Say, 1825) -- valid -- Crayfish Snake
  Liodytes rigida deltae (Huheey, 1959) -- valid -- Delta Crawfish Snake, Delta Crayfish Snake
  Liodytes rigida rigida (Say, 1825) -- valid -- Glossy Crawfish Snake, Glossy Crayfish Snake
  Liodytes rigida sinicola (Huheey, 1959) -- valid -- Gulf Crawfish Snake, Gulf Crayfish Snake
  Lioheterophis iheringi Amaral, 1935 -- valid -- Ihering's Snake
  Liopeltis calamaria (Günther, 1858) -- valid -- Calamaria Reed Snake
  Liopeltis frenatus (Günther, 1858) -- valid -- Günther's Reed Snake
  Liopeltis kikuzatoi Okada and Takara, 1958 -- invalid
  Liopeltis philippinus (Boettger, 1897) -- valid -- Philippine Liopeltine Snake
  Liopeltis rappi (Günther, 1860) -- valid -- Himalayan Stripe-necked Snake
  Liopeltis stoliczkae (Sclater, 1891) -- valid
  Liopeltis tricolor (Schlegel, 1837) -- valid -- Malayan Ringneck
  Liophidium apperti Domergue, 1984 -- valid
  Liophidium chabaudi Domergue, 1984 -- valid
  Liophidium maintikibo Franzen, Jones, Raselimanana, Nagy, d'Cruze, Glaw and Vences, 2009 -- valid
  Liophidium mayottensis (Peters, 1874) -- valid -- Peters' Bright Snake
  Liophidium pattoni Vieites, Ratsoavina, Randrianiaina, Nagy, Glaw and Vences, 2010 -- valid
  Liophidium rhodogaster (Schlegel, 1837) -- valid -- Gold-collarcd Snake
  Liophidium therezieni Domergue, 1984 -- valid
  Liophidium torquatum (Boulenger, 1888) -- valid
  Liophidium trilineatum Boulenger, 1896 -- valid -- Madagascar Three-lined Snake
  Liophidium vaillanti (Mocquard, 1901) -- valid
  Liopholidophis baderi Glaw, Kucharzewski, Nagy, Hawlitschek and Vences, 2013 -- valid
  Liopholidophis dimorphus Glaw, Nagy, Franzen and Vences, 2007 -- valid
  Liopholidophis dolicocercus (Peracca, 1892) -- valid
  Liopholidophis grandidieri Mocquard, 1904 -- valid -- Grandidier's Water Snake
  Liopholidophis oligolepis Glaw, Kucharzewski, Nagy, Hawlitschek and Vences, 2013 -- valid
  Liopholidophis rhadinaea Cadle, 1996 -- valid
  Liopholidophis sexlineatus (Günther, 1882) -- valid -- Six-lined Water Snake
  Liopholidophis varius (Fischer, 1884) -- valid
  Lycodon albofuscus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Lycodon alcalai Ota and Ross, 1994 -- valid -- Alcala's Wolf Snake
  Lycodon aulicus (Linnaeus, 1758) -- valid -- Indian Wolf Snake
  Lycodon bibonius Ota and Ross, 1994 -- valid -- Ota's Wolf Snake
  Lycodon butleri Boulenger, 1900 -- valid -- Butler's Wolf Snake
  Lycodon capucinus H. Boie in F. Boie, 1827 -- valid -- Common Wolf Snake
  Lycodon cardamomensis Daltry and Wüster, 2002 -- valid
  Lycodon carinatus (Kuhl, 1820) -- valid -- Ceylon Wolf Snake
  Lycodon chrysoprateros Ota and Ross, 1994 -- valid -- Ross' Wolf Snake
  Lycodon davidi Vogel, Nguyen, Kingsda and Ziegler, 2012 -- valid -- David's Wolf Snake
  Lycodon dumerilii (Boulenger, 1893) -- valid -- Duméril's Wolf Snake
  Lycodon effraenis Cantor, 1847 -- valid -- Brown Wolf Snake
  Lycodon fasciatus (Anderson, 1879) -- valid -- Banded Wolf Snake
  Lycodon fausti Gaulke, 2002 -- valid -- Faust's Wolf Snake
  Lycodon ferroni Lanza, 1999 -- valid
  Lycodon flavicollis Mukherjee and Bhupathy, 2007 -- valid -- Yellow-collared Wolf Snake
  Lycodon flavomaculatus Wall, 1907 -- valid -- Yellow-spotted Wolf Snake
  Lycodon flavozonatus (Pope, 1928) -- valid -- Big-tooth Snake
  Lycodon futsingensis (Pope, 1928) -- valid
  Lycodon gammiei (Blanford, 1878) -- valid -- Gammie's Wolf Snake, Sikkim False Wolf Snake
  Lycodon gongshan Vogel and Luo, 2011 -- valid -- Gongshan Wolf Snake
  Lycodon hypsirhinoides (Theobald, 1868) -- valid
  Lycodon jara (Shaw, 1802) -- valid -- Twin-spotted Wolf Snake
  Lycodon kundui M. A. Smith, 1943 -- valid
  Lycodon laoensis Günther, 1864 -- valid -- Laotian Wolf Snake
  Lycodon liuchengchaoi Zhang, Jiang, Vogel and Rao, 2011 -- valid
  Lycodon mackinnoni Wall, 1906 -- valid -- Mackinnon's Wolf Snake
  Lycodon meridionale Bourret, 1935 -- valid
  Lycodon muelleri A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Müller's Wolf Snake
  Lycodon multifasciatus (Maki, 1931) -- valid
  Lycodon ophiophagus Vogel, David, Pauwels, Sumontha, Norval, Hendrix, Vu and Ziegler, 2009 -- valid -- Snake-eater Wolf Snake
  Lycodon orientalis (Hilgendorf, 1880) -- valid -- Oriental Odd-tooth Snake
  Lycodon osmanhilli Taylor, 1950 -- valid -- Colombo Wolf Snake
  Lycodon paucifasciatus Rendahl in M. A. Smith, 1943 -- valid -- Rendahl's Wolf Snake
  Lycodon rosozonatus (Hu and Zhao, 1972) -- valid -- Rose Big-tooth Snake
  Lycodon rufozonatus Cantor, 1842 -- valid -- Red-banded Snake
  Lycodon rufozonatus rufozonatus Cantor, 1842 -- valid
  Lycodon rufozonatus walli (Stejneger, 1907) -- valid
  Lycodon ruhstrati (Fischer, 1886) -- valid -- Formosa Wolf Snake, Mountain Wolf Snake
  Lycodon ruhstrati abditus Vogel et al., 2009 -- valid
  Lycodon ruhstrati ruhstrati (Fischer, 1886) -- valid
  Lycodon semicarinatus (Cope, 1860) -- valid -- Loo-Choo Big-tooth Snake, Ryukyu Odd-tooth Snake
  Lycodon septentrionalis (Günther, 1875) -- valid -- Northern Large-toothed Snake, White-banded Wolf Snake
  Lycodon solivagus Ota and Ross, 1994 -- valid -- Common Wolf Snake
  Lycodon stormi Boettger, 1892 -- valid -- Sulawesi Wolf Snake
  Lycodon striatus (Shaw, 1802) -- valid -- Barred Wolf Snake, Northern Wolf Snake
  Lycodon striatus bicolor (Nikolsky, 1903) -- valid
  Lycodon striatus sinhaleyus Deraniyagala, 1955 -- valid
  Lycodon striatus striatus (Shaw, 1802) -- valid
  Lycodon subcinctus F. Boie, 1827 -- valid -- Malayan Banded Wolf Snake
  Lycodon subcinctus sealei Leviton, 1955 -- valid
  Lycodon subcinctus subcinctus F. Boie, 1827 -- valid
  Lycodon synaptor Vogel and David, 2010 -- valid -- Boehme's Wolf Snake
  Lycodon tessellatus Jan, 1863 -- valid -- Manila Wolf Snake
  Lycodon tiwarii Biswas and Sanyal, 1965 -- valid -- Andaman Wolf Snake
  Lycodon travancoricus (Beddome, 1870) -- valid -- Travancore Wolf Snake
  Lycodon zawi Slowinski, Pawar, Win, Thin, Gyi, Oo and Tun, 2001 -- valid -- Zaw's Wolf Snake
  Lycodonomorphus bicolor (Günther, 1893) -- valid -- Tanganyika Water Snake, White-bellied Water Snake
  Lycodonomorphus inornatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Black House Snake, Olive House Snake
  Lycodonomorphus laevissimus (Günther, 1862) -- valid -- Dusky-bellied Water Snake
  Lycodonomorphus laevissimus fitzsimonsi Raw, 1973 -- valid
  Lycodonomorphus laevissimus laevissimus (Günther, 1862) -- valid
  Lycodonomorphus laevissimus natalensis Raw, 1973 -- valid
  Lycodonomorphus leleupi (Laurent, 1950) -- valid -- Congo Dark-bellied Water-Snake, Mulanje Water Snake
  Lycodonomorphus rufulus (Lichtenstein, 1823) -- valid -- Common Brown Water Snake, Olive-brown Water-Snake, South African Rufous Snake
  Lycodonomorphus rufulus mlanjensis Loveridge, 1953 -- invalid
  Lycodonomorphus subtaeniatus Laurent, 1954 -- valid -- Eastern Congo White-bellied Water-Snake, Lined Water Snake
  Lycodonomorphus subtaeniatus upembae Laurent, 1954 -- invalid
  Lycodonomorphus whytii (Boulenger, 1897) -- valid -- Whyte's Water-Snake
  Lycodonomorphus whytii obscuriventris Fitzsimons, 1963 -- invalid
  Lycodryas carleti (Domergue, 1995) -- valid
  Lycodryas citrinus (Domergue, 1995) -- valid
  Lycodryas cococola Hawlitschek, Nagy and Glaw, 2012 -- valid
  Lycodryas cococola cococola Hawlitschek, Nagy and Glaw, 2012 -- valid
  Lycodryas cococola innocens Hawlitschek, Nagy and Glaw, 2012 -- valid
  Lycodryas gaimardi (Schlegel, 1837) -- valid
  Lycodryas granuliceps (Boettger, 1877) -- valid
  Lycodryas guentheri (Boulenger, 1896) -- valid
  Lycodryas inopinae (Domergue, 1995) -- valid
  Lycodryas inornatus (Boulenger, 1896) -- valid
  Lycodryas maculatus (Günther, 1858) -- valid -- Spotted Tree Snake
  Lycodryas pseudogranuliceps (Domergue, 1995) -- valid
  Lycognathophis Boulenger, 1893 -- valid
  Lycognathophis seychellensis (Schlegel, 1837) -- valid
  Lycophidion acutirostre Günther, 1868 -- valid -- Mozambique Wolf Snake
  Lycophidion albomaculatum Steindachner, 1870 -- valid
  Lycophidion capense (A. Smith, 1831) -- valid -- Cape Wolf Snake
  Lycophidion capense capense (A. Smith, 1831) -- valid
  Lycophidion capense jacksoni Boulenger, 1893 -- valid
  Lycophidion capense loveridgei Laurent, 1968 -- valid
  Lycophidion capense pembanum Laurent, 1968 -- invalid
  Lycophidion depressirostre Laurent, 1968 -- valid -- Flat-snouted Wolf Snake
  Lycophidion hellmichi Laurent, 1964 -- valid -- Hellmich's Wolf Snake
  Lycophidion irroratum (Leach, 1819) -- valid -- Leach's Wolf Snake, Pale Wolf Snake
  Lycophidion laterale Hallowell, 1857 -- valid -- Flat Wolf Snake
  Lycophidion meleagre Boulenger, 1893 -- valid -- Speckled Wolf Snake
  Lycophidion multimaculatum Boettger, 1888 -- valid -- Cape Wolf Snake
  Lycophidion namibianum Broadley, 1991 -- valid -- Namibian Wolf Snake
  Lycophidion nanum (Broadley, 1958) -- valid
  Lycophidion nigromaculatum (Peters, 1863) -- valid
  Lycophidion ornatum Parker, 1936 -- valid -- Ornate Wolf Snake
  Lycophidion pygmaeum Broadley, 1996 -- valid -- Pygmy Wolf Snake
  Lycophidion semiannule Peters, 1854 -- valid -- Eastern Wolf Snake
  Lycophidion semicinctum A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Lycophidion taylori Broadley and Hughes, 1993 -- valid -- Taylor's Wolf Snake
  Lycophidion uzungwense Loveridge, 1932 -- valid -- Red-snouted Wolf Snake
  Lycophidion variegatum Broadley, 1969 -- valid -- Variegated Wolf Snake
  Lygophis anomalus (Günther, 1858) -- valid
  Lygophis dilepis Cope, 1862 -- valid -- Lema's Ground Snake, Lema's Striped Snake
  Lygophis elegantissimus (Koslowsky, 1896) -- valid
  Lygophis flavifrenatus Cope, 1862 -- valid -- Fronted Ground Snake
  Lygophis lineatus (Linnaeus, 1758) -- valid -- Lined Ground Snake
  Lygophis meridionalis (Schenkel, 1901) -- valid
  Lygophis paucidens Hoge, 1953 -- valid -- Hoge's Ground Snake
  Lygophis vanzolinii (Dixon, 1985) -- valid -- Vanzolini's Ground Snake
  Lytorhynchus diadema (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Awl-headed Snake, Crowned Leafnose Snake, Diademed Sand Snake
  Lytorhynchus diadema arabicus Haas, 1952 -- valid
  Lytorhynchus diadema diadema (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Lytorhynchus diadema gaddi Nikolsky, 1907 -- valid
  Lytorhynchus diadema mesopotamicus Haas, 1952 -- valid
  Lytorhynchus gasperetti Leviton, 1977 -- valid -- Leviton's Leafnose Snake
  Lytorhynchus kennedyi Schmidt, 1939 -- valid -- Kennedy's Leafnose Snake
  Lytorhynchus maynardi Alcock and Finn, 1897 -- valid -- Maynard's Longnose Sand Snake
  Lytorhynchus paradoxus (Günther, 1875) -- valid -- Sind Longnose Sand Snake, Sindh Awl-headed Snake
  Lytorhynchus ridgewayi Boulenger, 1887 -- valid -- Derafshi Snake
  Macrelaps microlepidotus (Günther, 1860) -- valid -- Natal Black Snake
  Macrocalamus chanardi David and Pauwels, 2005 -- valid
  Macrocalamus gentingensis Yaakob and Lim, 2002 -- valid
  Macrocalamus jasoni Grandison, 1972 -- valid -- Jason's Mountain Reed Snake
  Macrocalamus lateralis Günther, 1864 -- valid -- Malayan Mountain Reed Snake, Striped Reedsnake
  Macrocalamus schulzi Vogel and David, 1999 -- valid
  Macrocalamus tweediei Lim, 1963 -- valid -- Tweedie's Mountain Reed Snake
  Macrocalamus vogeli David and Pauwels, 2005 -- valid
  Macropisthodon Boulenger, 1893 -- valid
  Macropisthodon flaviceps (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Orangeneck Keelback, Yellow-headed Keelback
  Macropisthodon plumbicolor (Cantor, 1839) -- valid -- Green Keelback, Lead Keelback
  Macropisthodon plumbicolor palabriya Deraniyagala, 1955 -- valid
  Macropisthodon plumbicolor plumbicolor (Cantor, 1839) -- valid
  Macropisthodon rhodomelas (H. Boie in F. Boie, 1827) -- valid -- Blueneck Keelback
  Macropisthodon rudis Boulenger, 1906 -- valid -- False Habu, Red Keelback
  Macropisthodon rudis multiprefrontalis Zhao and Jiang, 1981 -- valid
  Macropisthodon rudis rudis Boulenger, 1906 -- valid
  Macroprotodon abubakeri Wade, 2001 -- valid
  Macroprotodon brevis (Günther, 1862) -- valid -- Iberian False Smooth Snake, Western False Smooth Snake
  Macroprotodon brevis brevis (Günther, 1862) -- valid
  Macroprotodon brevis ibericus Busack and McCoy, 1990 -- valid
  Macroprotodon cucullatus (Geoffroy de St-Hilaire, 1827) -- valid -- False Smooth Snake
  Macroprotodon mauritanicus Guichenot, 1850 -- valid
  Macrovipera lebetina (Linnaeus, 1758) -- valid -- Levantine Viper
  Macrovipera lebetina chernovi (Chikin and Szczerbak, 1992) -- valid
  Macrovipera lebetina lebetina (Linnaeus, 1758) -- valid
  Macrovipera lebetina obtusa (Dwigubsky, 1832) -- valid
  Macrovipera lebetina transmediterranea (Nilson and Andrén, 1988) -- valid
  Macrovipera lebetina turanica (Chernov, 1940) -- valid
  Macrovipera schweizeri (Werner, 1935) -- valid
  Madagascarophis colubrinus (Schlegel, 1837) -- valid
  Madagascarophis colubrinus citrinus (Boettger, 1877) -- valid
  Madagascarophis colubrinus colubrinus (Schlegel, 1837) -- valid
  Madagascarophis colubrinus occidentalis Domergue, 1987 -- valid
  Madagascarophis colubrinus pastoriensis Domergue, 1987 -- valid
  Madagascarophis colubrinus septentrionalis Domergue, 1987 -- valid
  Madagascarophis fuchsi Glaw, Kucharzewski, Köhler, Vences and Nagy, 2013 -- valid
  Madagascarophis meridionalis Domergue, 1987 -- valid
  Madagascarophis ocellatus Domergue, 1987 -- valid
  Magliophis exiguum (Cope, 1863) -- valid -- Ground Snake, Puerto Rican Garden Snake
  Magliophis exiguum exiguum (Cope, 1863) -- valid
  Magliophis exiguum subspadix (Schwartz, 1967) -- valid
  Magliophis stahli (Stejneger, 1904) -- valid
  Malpolon insignitus (Geoffroy de St-Hilaire, 1809) -- valid -- Eastern Montpellier Snake
  Malpolon insignitus fuscus (Fleischmann, 1831) -- valid
  Malpolon insignitus insignitus (Geoffroy de St-Hilaire, 1809) -- valid
  Malpolon monspessulanus (Hermann, 1804) -- valid -- Montpellier Snake
  Malpolon monspessulanus monspessulanus (Hermann, 1804) -- valid
  Malpolon monspessulanus saharatlanticus Geniez, Cluchier and de Haan, 2006 -- valid
  Manolepis putnami (Jan, 1863) -- valid -- Culebra cabeza surcada, Ridgehead Snake
  Mastigodryas amarali (Stuart, 1938) -- valid -- Amaral's Tropical Racer
  Mastigodryas bifossatus (Raddi, 1820) -- valid -- Rio Tropical Racer
  Mastigodryas bifossatus bifossatus (Raddi, 1820) -- valid
  Mastigodryas bifossatus striatus (Amaral, 1931) -- valid
  Mastigodryas bifossatus triseriatus (Amaral, 1931) -- valid
  Mastigodryas boddaerti (Sentzen, 1796) -- valid -- Boddaert's Tropical Racer
  Mastigodryas boddaerti boddaerti (Sentzen, 1796) -- valid
  Mastigodryas boddaerti dunni (Stuart, 1933) -- valid
  Mastigodryas boddaerti ruthveni (Stuart, 1933) -- valid
  Mastigodryas bruesi (Barbour, 1914) -- valid -- Barbour's Tropical Racer
  Mastigodryas cliftoni (Hardy, 1964) -- valid -- Clifton's Lizard Eater, Culebra-lagartijera de Clifton
  Mastigodryas danieli Amaral, 1935 -- valid -- Daniel's Tropical Racer
  Mastigodryas dorsalis (Bocourt, 1890) -- valid -- Striped Lizard Eater
  Mastigodryas heathii (Cope, 1876) -- valid -- Heath's Tropical Racer
  Mastigodryas melanolomus (Cope, 1868) -- valid -- Culebra-lagartijera común, Salmon-bellied Racer
  Mastigodryas melanolomus alternatus (Bocourt, 1884) -- invalid
  Mastigodryas melanolomus laevis (Fischer, 1881) -- valid
  Mastigodryas melanolomus melanolomus (Cope, 1868) -- valid
  Mastigodryas melanolomus slevini (Stuart, 1933) -- valid
  Mastigodryas melanolomus stuarti (H. M. Smith, 1943) -- valid
  Mastigodryas melanolomus tehuanae (H. M. Smith, 1943) -- valid
  Mastigodryas melanolomus veraecrucis Stuart, 1941 -- valid
  Mastigodryas moratoi Montingelli and Zaher, 2011 -- valid
  Mastigodryas pleei (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Plee's Tropical Racer
  Mastigodryas pulchriceps (Cope, 1868) -- valid -- Cope's Tropical Racer
  Mastigodryas reticulatus (Peters, 1863) -- valid
  Meizodon coronatus (Schlegel, 1837) -- valid -- Western Crowned Snake
  Meizodon krameri Schätti, 1985 -- valid -- Tana Delta Smooth Snake
  Meizodon plumbiceps (Boettger, 1893) -- valid -- Black-headed Smooth Snake
  Meizodon regularis Fischer, 1856 -- valid -- Eastern Crowned Smooth Snake
  Meizodon semiornatus (Peters, 1854) -- valid -- Semiornate Smooth Snake
  Meizodon semiornatus semiornatus (Peters, 1854) -- valid
  Meizodon semiornatus tchadensis (Chabanaud, 1917) -- valid
  Micrelaps bicoloratus Sternfeld, 1908 -- valid -- Kenya Two-headed Snake
  Micrelaps bicoloratus bicoloratus Sternfeld, 1908 -- valid
  Micrelaps bicoloratus moyeri Rasmussen, 2002 -- valid
  Micrelaps muelleri Boettger, 1880 -- valid
  Micrelaps tchernovi Werner, Babocsay, Carmely and Thuna, 2006 -- valid -- Tchernov's Chainling
  Micrelaps vaillanti (Mocquard, 1888) -- valid -- Black-headed Micrelaps, Somali Two-headed Snake
  Micropisthodon ochraceus Mocquard, 1894 -- valid
  Microps lineatus Hallowell, 1856 -- invalid
  Mimophis mahfalensis (Grandidier, 1867) -- valid
  Mimophis mahfalensis madagascariensis Günther, 1868 -- valid
  Mimophis mahfalensis mahfalensis (Grandidier, 1867) -- valid
  Mixcoatlus barbouri (Dunn, 1919) -- valid -- Barbour's Montane Pitviper, Nauyaca-de montaña guerrerense
  Mixcoatlus browni (Shreve, 1938) -- valid -- Brown's Montane Pitviper
  Mixcoatlus melanurus (Müller, 1924) -- valid -- Black-tailed Horned Pitviper, Nauyaca-nariz de cerdo cornuda
  Mizodon variegatus Peters, 1861 -- invalid
  Montaspis gilvomaculata Bourquin, 1991 -- valid -- Cream-spotted Mountain Snake
  Montatheris hindii (Boulenger, 1910) -- valid -- Kenya Montane Viper
  Montivipera albizona (Nilson, Andrén and Flärdh, 1990) -- valid
  Montivipera bornmuelleri (Werner, 1898) -- valid -- Lebanon Viper
  Montivipera kuhrangica Rajabizadeh, Nilson and Kami, 2011 -- valid -- Kuhrang Mountain Viper
  Montivipera latifii (Mertens, Darewsky and Klemmer, 1967) -- valid -- Lar Valley Viper
  Montivipera raddei (Boettger, 1890) -- valid -- Caucasus Viper
  Montivipera raddei kurdistanica (Nilson and Andrén, 1986) -- valid
  Montivipera raddei raddei (Boettger, 1890) -- valid
  Montivipera wagneri (Nilson and Andrén, 1984) -- valid -- Wagner's Viper
  Montivipera xanthina (Gray, 1849) -- valid -- Coastal Viper, Ottoman Viper
  Mussurana bicolor (Peracca, 1904) -- valid -- Two-colored Mussurana
  Mussurana montana (Franco, Marques and Puorto, 1997) -- valid
  Mussurana quimi (Franco, Marques and Puorto, 1997) -- valid
  Myersophis alpestris Taylor, 1963 -- valid
  Natricinae Bonaparte, 1838 -- valid
  Natriciteres Loveridge, 1953 -- valid
  Natriciteres bipostocularis Broadly, 1962 -- valid -- Southwestern Forest Marsh Snake
  Natriciteres fuliginoides (Günther, 1858) -- valid -- Collared Marsh-Snake, Forest Marsh Snake
  Natriciteres olivacea (Peters, 1854) -- valid -- Olive Marsh Snake
  Natriciteres olivacea bipostocularis Broadly, 1962 -- invalid
  Natriciteres pembana (Loveridge, 1935) -- valid -- Variable Marsh Snake
  Natriciteres sylvatica Broadly, 1966 -- valid -- Forest Marsh Snake
  Natriciteres variegata (Peters, 1861) -- valid -- Variable Marsh Snake
  Natriciteres variegata sylvatica Broadly, 1966 -- invalid
  Natrix Laurenti, 1768 -- valid
  Natrix aequifasciata Barbour, 1908 -- invalid
  Natrix angelii Bourret, 1934 -- invalid
  Natrix atemporalis Bourret, 1934 -- invalid
  Natrix barbouri Taylor, 1922 -- invalid
  Natrix bitaeniata Wall, 1925 -- invalid
  Natrix boulengeri Gressitt, 1937 -- invalid
  Natrix cetti Gené, 1838 -- invalid
  Natrix chrysarga callichroma Bourret, 1934 -- invalid
  Natrix clerki Wall, 1925 -- invalid
  Natrix dendrophiops negrosensis Taylor, 1917 -- invalid
  Natrix deschauenseei Taylor, 1934 -- invalid
  Natrix fasciata confluens Blanchard, 1923 -- invalid
  Natrix fasciata pictiventris Cope, 1895 -- invalid
  Natrix frenata Dunn, 1923 -- invalid
  Natrix groundwateri M. A. Smith, 1922 -- invalid
  Natrix helleri Schmidt, 1925 -- invalid
  Natrix leonardi Wall, 1923 -- invalid
  Natrix mairii multiscutellata Brongersma, 1948 -- invalid
  Natrix maura (Linnaeus, 1758) -- valid -- Viperine Water Snake
  Natrix miyajimae Maki, 1931 -- invalid
  Natrix murudensis M. A. Smith, 1925 -- invalid
  Natrix natrix (Linnaeus, 1758) -- valid -- European Grass Snake
  Natrix natrix algirus (Sochurek, 1979) -- valid
  Natrix natrix astreptophora (Seoane, 1885) -- valid
  Natrix natrix calabra Vanni and Lanza, 1983 -- valid
  Natrix natrix cetti Gené, 1838 -- valid
  Natrix natrix corsa (Hecht, 1930) -- valid
  Natrix natrix cypriaca (Hecht, 1930) -- valid
  Natrix natrix fusca Cattaneo, 1990 -- valid
  Natrix natrix gotlandica Nilson and Andrén, 1981 -- valid
  Natrix natrix helvetica (Lacépède, 1789) -- valid
  Natrix natrix lanzai Kramer, 1970 -- valid
  Natrix natrix natrix (Linnaeus, 1758) -- valid
  Natrix natrix persa (Pallas, 1814) -- valid
  Natrix natrix schweizeri L. Müller, 1932 -- valid
  Natrix natrix scutata (Pallas, 1771) -- valid
  Natrix natrix sicula (Cuvier, 1829) -- valid
  Natrix olivacea pembana Loveridge, 1935 -- invalid
  Natrix optata Hu and Zhao, 1966 -- invalid
  Natrix popei Schmidt, 1925 -- invalid
  Natrix rhombifera werleri Conant, 1953 -- invalid
  Natrix rigida deltae Huheey, 1959 -- invalid
  Natrix rigida sinicola Huheey, 1959 -- invalid
  Natrix sanguinea Smedley, 1931 -- invalid
  Natrix sipedon williamengelsi Conant and Lazell, 1973 -- invalid
  Natrix suriki Maki, 1931 -- invalid
  Natrix tessellata (Laurenti, 1768) -- valid -- Dice Snake
  Natrix tigrina formosana Maki, 1931 -- invalid
  Natrix valida isabellae Conant, 1953 -- invalid
  Natrix valida thamnophisoides Conant, 1961 -- invalid
  Natrix venningi taronensis M. A. Smith, 1940 -- invalid
  Natrix vibakari ruthveni Van Denburgh, 1923 -- invalid
  Nerodia Baird and Girard, 1853 -- valid -- North American Water Snakes, Water Snakes
  Nerodia clarkii (Baird and Girard, 1853) -- valid -- Gulf salt marsh snake, Salt Marsh Snake, Salt Marsh Water Snake, Saltmarsh Snake
  Nerodia clarkii clarkii (Baird and Girard, 1853) -- valid -- Gulf Salt Marsh Snake
  Nerodia clarkii compressicauda Kennicott, 1860 -- valid -- Mangrove Salt Marsh Snake
  Nerodia clarkii taeniata (Cope, 1895) -- valid -- Atlantic Salt Marsh Snake
  Nerodia compressicauda Kennicott, 1860 -- invalid
  Nerodia cyclopion (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Green Water Snake, Mississippi Green Water Snake
  Nerodia erythrogaster (Forster in Bossu, 1771) -- valid -- Culebra-de agua vientre claro, Plain-bellied Water Snake, Plainbelly Water Snake
  Nerodia fasciata (Linnaeus, 1766) -- valid -- Southern Water Snake
  Nerodia fasciata confluens (Blanchard, 1923) -- valid -- Broad-banded Water Snake
  Nerodia fasciata fasciata (Linnaeus, 1766) -- valid -- Southern Water Snake
  Nerodia fasciata pictiventris (Cope, 1895) -- valid -- Florida Water Snake
  Nerodia floridana (Goff, 1936) -- valid -- Florida Green Water Snake
  Nerodia harteri (Trapido, 1941) -- valid -- Brazos River Water Snake, Brazos River Watersnake, Brazos Water Snake, Harter's Water Snake, Harters Water Snake
  Nerodia paucimaculata (Tinkle and Conant, 1961) -- valid -- Concho Water Snake
  Nerodia rhombifer (Hallowell, 1852) -- valid -- Culebra-de agua de diamantes, Diamondback Water Snake
  Nerodia rhombifer blanchardi (Clay, 1938) -- valid
  Nerodia rhombifer rhombifer (Hallowell, 1852) -- valid -- Diamondback Water Snake
  Nerodia rhombifer werleri (Conant, 1953) -- valid
  Nerodia sipedon (Linnaeus, 1758) -- valid -- couleuvre d'eau, Northern Water Snake
  Nerodia sipedon insularum (Conant and Clay, 1937) -- valid -- Lake Erie Water Snake
  Nerodia sipedon pleuralis (Cope, 1892) -- valid -- Midland Water Snake
  Nerodia sipedon sipedon (Linnaeus, 1758) -- valid -- Northern Water Snake
  Nerodia sipedon williamengelsi (Conant and Lazell, 1973) -- valid -- Carolina Water Snake
  Nerodia taxispilota (Holbrook, 1838) -- valid -- Brown Water Snake
  Ninia atrata (Hallowell, 1845) -- valid -- Hallowell's Coffee Snake, South American Coffee Snake
  Ninia celata McCranie and Wilson, 1995 -- valid
  Ninia diademata Baird and Girard, 1853 -- valid -- Culebra-de cafetal de collar, Veracruz Ringneck Coffee Snake
  Ninia diademata diademata Baird and Girard, 1853 -- valid -- Veracruz Ringneck Coffee Snake
  Ninia diademata labiosa (Bocourt, 1883) -- valid -- Pacific Ring-necked Coffee Snake
  Ninia diademata nietoi Burger and Werler, 1954 -- valid -- Caribbean Ring-necked Coffee Snake
  Ninia diademata plorator H. M. Smith, 1942 -- valid -- Hidalgo Ring-necked Coffee Snake
  Ninia espinali McCranie and Wilson, 1995 -- valid
  Ninia hudsoni Parker, 1940 -- valid -- Guiana Coffee Snake, Hudson's Coffee Snake
  Ninia maculata (Peters, 1861) -- valid -- Pacific Banded Coffee Snake, Spotted Coffee Snake
  Ninia pavimentata (Bocourt, 1883) -- valid -- Northern Banded Coffee Snake
  Ninia psephota (Cope, 1875) -- valid -- Cope's Coffee Snake, Red-bellied Coffee Snake
  Ninia sebae (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-de cafetal espalda roja, Redback Coffee Snake
  Ninia sebae immaculata Schmidt and Rand, 1957 -- valid
  Ninia sebae morleyi Schmidt and Andrews, 1936 -- valid
  Ninia sebae punctulata (Bocourt, 1883) -- valid
  Ninia sebae sebae (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Nothopsis rugosus Cope, 1871 -- valid -- Rough Coffee Snake
  Oligodon affinis Günther, 1862 -- valid -- Kukri Snake
  Oligodon albocinctus (Cantor, 1839) -- valid -- Light-barred Kukri Snake
  Oligodon ancorus (Girard, 1858) -- valid -- Northern Short-headed Snake
  Oligodon annamensis Leviton, 1953 -- valid -- Annam Kukri Snake
  Oligodon annulifer (Boulenger, 1893) -- valid -- Ringed Kukri Snake
  Oligodon arnensis (Shaw, 1802) -- valid -- Banded Kukri, Common Kukri Snake, Russet Kukri Snake
  Oligodon barroni (M. A. Smith, 1916) -- valid -- Barron's Kukri Snake
  Oligodon bitorquatus F. Boie, 1827 -- valid -- Boie's Kukri Snake
  Oligodon booliati Leong and Grismer, 2004 -- valid
  Oligodon brevicauda Günther, 1862 -- valid -- Shorthead Kukri Snake
  Oligodon calamarius (Linnaeus, 1758) -- valid
  Oligodon catenatus (Blyth, 1854) -- valid -- Assam Kukri Snake
  Oligodon cattienensis Vassilieva, Geissler, Galoyan, Poyarkov Jr, Van Devender and Böhme, 2013 -- valid
  Oligodon chinensis (Günther, 1888) -- valid -- Chinese Kukri Snake
  Oligodon cinereus (Günther, 1864) -- valid -- Ashy Kukri Snake, Günther's Kukri Snake
  Oligodon cruentatus (Günther, 1868) -- valid -- Pegu Kukri Snake
  Oligodon cyclurus (Cantor, 1839) -- valid -- Cantor's Kukri Snake
  Oligodon deuvei David, Vogel and Van Rooijen, 2008 -- valid
  Oligodon dorsalis (Gray and Hardwicke, 1835) -- valid -- Bengalese Kukri Snake, Gray's Kukri Snake
  Oligodon eberhardti Pellegrin, 1910 -- valid -- Eberhardt's Kukri Snake
  Oligodon erythrogaster Boulenger, 1907 -- valid -- Nagarkot Kukri Snake
  Oligodon erythrorhachis Wall, 1910 -- valid -- Namsang Kukri Snake
  Oligodon everetti Boulenger, 1893 -- valid -- Everett's Kukri Snake
  Oligodon fasciolatus (Günther, 1864) -- valid -- Fasciolated Kukri Snake
  Oligodon forbesi (Boulenger, 1883) -- valid -- Forbes' Kukri Snake
  Oligodon formosanus (Günther, 1872) -- valid -- Formosa Kukri Snake
  Oligodon hamptoni Boulenger, 1918 -- valid -- Hampton's Kukri Snake
  Oligodon inornatus (Boulenger, 1914) -- valid -- Inornate Kukri Snake, Unicolored Kukri Snake
  Oligodon jintakunei Pauwels, Wallach, David and Chanhome, 2002 -- valid
  Oligodon joynsoni (M. A. Smith, 1917) -- valid -- Gray Kukri Snake, Joynson's Kukri Snake
  Oligodon juglandifer (Wall, 1909) -- valid -- Walnut Kukri Snake
  Oligodon kampucheaensis Neang, Grismer and Daltry, 2012 -- valid
  Oligodon kheriensis Acharji and Ray, 1936 -- valid -- Coral Red Kukri Snake
  Oligodon lacroixi Angel and Bourret, 1933 -- valid -- Lacroix Kukri Snake
  Oligodon lungshenensis Zheng and Huang, 1978 -- valid
  Oligodon macrurus (Angel, 1927) -- valid -- Angel's Kukri Snake
  Oligodon maculatus (Taylor, 1918) -- valid -- Spotted Kukri Snake
  Oligodon mcdougalli Wall, 1905 -- valid -- McDougall's Kukri Snake
  Oligodon melaneus Wall, 1909 -- valid -- Bluebelly Kukri Snake
  Oligodon melanozonatus Wall, 1922 -- valid -- Abor Hills Kukri Snake
  Oligodon meyerinkii (Steindachner, 1891) -- valid
  Oligodon modestus Günther, 1864 -- valid -- Luzon Kukri Snake
  Oligodon moricei David, Vogel and Van Rooijen, 2008 -- valid
  Oligodon mouhoti (Boulenger, 1914) -- valid -- Cambodian Kukri Snake, Mouhot's Kukri Snake
  Oligodon multizonatus Zhao and Jiang, 1981 -- invalid
  Oligodon nagao David, Nguyen, Nguyen, Jiang, Chen, Teynié and Ziegler, 2012 -- valid
  Oligodon nikhili Whitaker and Dattatri, 1982 -- valid -- Nikhil's Kukri Snake
  Oligodon ningshaanensis Yuan, 1983 -- invalid
  Oligodon notospilus Günther, 1873 -- valid
  Oligodon ocellatus (Morice, 1875) -- valid -- Ocellated Kukri Snake
  Oligodon octolineatus (Schneider, 1801) -- valid -- Eight-Striped Kukri Snake, Grace's Kukri Snake, Striped Kukri Snake
  Oligodon ornatus Van Denburgh, 1909 -- valid -- Ornate Kukri Snake
  Oligodon perkinsi (Taylor, 1925) -- valid -- Perkin's Short-headed Snake
  Oligodon petronellae Rooij, 1917 -- valid
  Oligodon planiceps (Boulenger, 1888) -- valid
  Oligodon praefrontalis Werner, 1913 -- valid
  Oligodon pseudotaeniatus David, Vogel and Van Rooijen, 2008 -- valid
  Oligodon pulcherrimus Werner, 1909 -- valid
  Oligodon purpurascens (Schlegel, 1837) -- valid -- Brown Kukri Snake
  Oligodon saintgironsi David, Vogel and Pauwels, 2008 -- valid
  Oligodon signatus (Günther, 1864) -- valid -- Banded Kukri Snake, Barred Kukri Snake
  Oligodon splendidus (Günther, 1875) -- valid -- Splendid Kukri Snake
  Oligodon sublineatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Duméril's Kukri Snake
  Oligodon taeniatus (Günther, 1861) -- valid -- Striped Kukri Snake
  Oligodon taeniolatus (Jerdon, 1853) -- valid -- Streaked Kukuri Snake
  Oligodon taeniolatus fasciatus Günther, 1864 -- valid
  Oligodon taeniolatus taeniolatus (Jerdon, 1853) -- valid
  Oligodon theobaldi (Günther, 1868) -- valid -- Theobald's Kukri Snake
  Oligodon torquatus (Boulenger, 1888) -- valid
  Oligodon travancoricus Beddome, 1877 -- valid -- Travancore Kukri Snake
  Oligodon trilineatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Three-lined Kukri Snake
  Oligodon unicolor (Kopstein, 1926) -- valid
  Oligodon venustus (Jerdon, 1853) -- valid -- Jerdon's Kukri Snake
  Oligodon vertebralis (Günther, 1865) -- valid -- Vertebral Kukri Snake
  Oligodon waandersi (Bleeker, 1860) -- valid -- Bleeker's Kukri Snake
  Oligodon wagneri David and Vogel, 2012 -- valid -- Wagner's Kukri Snake
  Oligodon woodmasoni (Sclater, 1891) -- valid
  Omoadiphas aurula Köhler, McCranie and Wilson, 2001 -- valid
  Omoadiphas cannula McCranie and Cruz-Díaz, 2010 -- valid
  Omoadiphas texiguatensis McCranie and Castaneda, 2004 -- valid
  Oocatochus rufodorsatus (Cantor, 1842) -- valid -- Frog-eating Rat Snake, Red-backed Rat Snake
  Opheodrys aestivus (Linnaeus, 1766) -- valid -- Culebra-verde rugosa, Rough Green Snake, Rough Greensnake
  Opheodrys aestivus aestivus (Linnaeus, 1766) -- valid -- Northern Rough Greensnake
  Opheodrys aestivus carinatus Grobman, 1984 -- valid -- Florida Rough Greensnake
  Opheodrys vernalis (Harlan, 1827) -- valid -- Culebra-verde lisa, Smooth Green Snake, Smooth Greensnake
  Ophryacus undulatus (Jan, 1859) -- valid -- Mexican Horned Pit Viper, Slender-horned Pitviper
  Opisthotropis Günther, 1872 -- valid
  Opisthotropis alcalai Brown and Leviton, 1961 -- valid -- Gary's Mountain Keelback
  Opisthotropis andersonii (Boulenger, 1888) -- valid -- Anderson's Mountain Keelback
  Opisthotropis atra Günther, 1872 -- valid
  Opisthotropis balteata (Cope, 1895) -- valid -- Hainan Mountain Keelback
  Opisthotropis cheni Zhao, 1999 -- valid
  Opisthotropis cucae David, Cuong The Pham, T. Q. Nguyen and Zigler, 2011 -- valid -- Cuc's Mountain Snake
  Opisthotropis daovantieni Orlov, Darevsky and Murphy, 1998 -- valid -- Tien's Mountain Stream Snake
  Opisthotropis durandi Teynié, Lottier, David, T. Q. Nguyen & Vogel, 2014 -- valid -- Durand's Mountain Stream Snake
  Opisthotropis guangxiensis Zhao and Jiang, 1979 -- valid -- Guangxi Mountain Keelback
  Opisthotropis jacobi Angel and Bourret, 1933 -- valid -- Chapa Mountain Keelback
  Opisthotropis kikuzatoi (Okada and Takara, 1958) -- valid -- Kikuzato's Stream Snake
  Opisthotropis kuatunensis Pope, 1928 -- valid -- Chinese Mountain Keelback
  Opisthotropis lateralis Boulenger, 1903 -- valid -- Tonkin Mountain Keelback
  Opisthotropis latouchii (Boulenger, 1899) -- valid -- Sichuan Mountain Keelback
  Opisthotropis laui J.-H. Yang, Sung and B. P.-L. Chan, 2013 -- valid -- Lau's Mountain Stream Snake
  Opisthotropis maculosa Stuart and Chuaynkern, 2007 -- valid -- Yellow-spotted Mountain Keelback, Yellow-spotted Mountain Stream Snake
  Opisthotropis maxwelli Boulenger, 1914 -- valid -- Maxwell's Mountain Keelback
  Opisthotropis rugosa (Lidth de Jeude, 1890) -- valid
  Opisthotropis shenzhenensis Y.-Y. Wang, Guo, Z.-Y. Liu, Lyu, J. Wang, Luo, Sun and Y.-W. Zhang, 2017 -- valid -- Shenzhen Mountain Stream Snake
  Opisthotropis spenceri M. A. Smith, 1918 -- valid -- Smith's Mountain Keelback, Spencer's Stream Snake
  Opisthotropis tamdaoensis Zielger, David and Thanh, 2008 -- valid
  Opisthotropis typica (Mocquard, 1890) -- valid -- Olive Mountain Keelback
  Oreocalamus hanitschi Boulenger, 1899 -- valid -- Hanitsch's Reed Snake, Kalimantan Burrowing Snake
  Oreocryptophis porphyraceus (Cantor, 1839) -- valid -- Black-banded Trinket Snake, Red Bamboo Snake
  Oreocryptophis porphyraceus coxi (Schulz and Helfenberger, 1998) -- valid
  Oreocryptophis porphyraceus kawakamii (Oshima, 1911) -- valid
  Oreocryptophis porphyraceus laticincta (Schulz and Helfenberger, 1998) -- valid
  Oreocryptophis porphyraceus porphyraceus (Cantor, 1839) -- valid
  Oreocryptophis porphyraceus pulchra (Schmidt, 1925) -- valid
  Oreocryptophis porphyraceus vaillanti (Sauvage, 1876) -- valid
  Orthriophis cantoris (Boulenger, 1894) -- valid -- Eastern Trinket Snake
  Orthriophis hodgsoni (Günther, 1860) -- valid
  Orthriophis moellendorffi (Boettger, 1886) -- valid -- Flower Snake, Moellendorf's Rat Snake
  Orthriophis taeniurus (Cope, 1861) -- valid -- Beauty Snake
  Orthriophis taeniurus callicyanous Schulz, 2010 -- valid -- Blue Beauty Ratsnake
  Orthriophis taeniurus friesei (Werner, 1927) -- valid -- Taiwan Beauty Snake
  Orthriophis taeniurus grabowskyi (Fischer, 1885) -- valid
  Orthriophis taeniurus helfenbergeri Schulz, 2010 -- valid
  Orthriophis taeniurus mocquardi (Schulz, 1996) -- valid
  Orthriophis taeniurus ridleyi (Butler, 1899) -- valid
  Orthriophis taeniurus schmackeri (Boettger, 1895) -- valid -- Sakishima Beauty Snake
  Orthriophis taeniurus taeniurus (Cope, 1861) -- valid
  Orthriophis taeniurus yunnanensis (Anderson, 1879) -- valid
  Ovophis convictus (Stoliczka, 1870) -- valid -- Indo-Malayan Mountain Pitviper
  Ovophis monticola (Günther, 1864) -- valid -- Chinese Mountain Pit Viper
  Ovophis monticola makazayazaya (Takahashi, 1922) -- invalid
  Ovophis monticola monticola (Günther, 1864) -- invalid
  Ovophis monticola zhaokentangi Zhao, 1995 -- invalid
  Ovophis okinavensis (Boulenger, 1892) -- valid -- Okinawa Pitviper, Ryukyu Island Pit Viper
  Ovophis tonkinensis (Bourret, 1934) -- valid -- Tonkin Pitviper
  Ovophis zayuensis (Jiang, 1977) -- valid
  Oxybelis aeneus (Wagler, 1824) -- valid -- Brown Vine Snake, Brown Vinesnake, Culebra-bejuquilla mexicana, Mexican Vine Snake
  Oxybelis brevirostris (Cope, 1861) -- valid -- Cope's Vine Snake
  Oxybelis fulgidus (Daudin, 1803) -- valid -- Culebra-bejuquilla verde
  Oxybelis wilsoni Villa and McCranie, 1995 -- valid
  Oxyrhopus clathratus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Duméril's False Coral Snake
  Oxyrhopus doliatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Bibron's False Coral Snake
  Oxyrhopus erdisii (Barbour, 1913) -- valid
  Oxyrhopus fitzingeri (Tschudi, 1845) -- valid -- Fitzinger's False Coral Snake
  Oxyrhopus fitzingeri fitzingeri (Tschudi, 1845) -- valid
  Oxyrhopus fitzingeri frizzelli Schmidt and Walker, 1943 -- valid
  Oxyrhopus formosus (Wied-Neuwied, 1820) -- valid -- Beautiful Calico Snake, Formosa False Coral Snake
  Oxyrhopus guibei Hoge and Romano, 1977 -- valid
  Oxyrhopus leucomelas (Werner, 1916) -- valid -- Werner's False Coral Snake
  Oxyrhopus marcapatae (Boulenger, 1902) -- valid -- Boulenger's False Coral Snake
  Oxyrhopus melanogenys (Tschudi, 1845) -- valid -- Tschudi's False Coral Snake
  Oxyrhopus melanogenys melanogenys (Tschudi, 1845) -- valid
  Oxyrhopus melanogenys orientalis da Cunha and Nascimento, 1983 -- valid
  Oxyrhopus occipitalis (Wied-Neuwied, 1824) -- valid
  Oxyrhopus petolarius (Linnaeus, 1758) -- valid -- Calico Snake, Culebra-encendida de Cálico, Forest Flame Snake
  Oxyrhopus petolarius digitalis (Reuss, 1834) -- valid
  Oxyrhopus petolarius petolarius (Linnaeus, 1758) -- valid
  Oxyrhopus petolarius sebae A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Oxyrhopus rhombifer A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Amazon False Coral Snake
  Oxyrhopus rhombifer bachmanni (Weyenberg, 1876) -- valid
  Oxyrhopus rhombifer inaequifasciatus Werner, 1909 -- valid
  Oxyrhopus rhombifer rhombifer A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Oxyrhopus trigeminus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Brazilian False Coral Snake
  Oxyrhopus trigeminus guibei Hoge and Romano, 1977 -- invalid
  Oxyrhopus vanidicus Lynch, 2009 -- valid
  Pantherophis alleghaniensis (Holbrook, 1836) -- valid -- Eastern Rat Snake, Eastern Ratsnake
  Pantherophis bairdi (Yarrow, 1880) -- valid -- Baird's Rat Snake, Baird's Ratsnake, Culebra-ratonera de Baird
  Pantherophis emoryi (Baird and Girard, 1853) -- valid -- Great Plains Rat Snake
  Pantherophis guttatus (Linnaeus, 1766) -- valid -- Corn Snake, Cornsnake, Culebra-ratonera de maiz, Eastern Corn Snake
  Pantherophis obsoletus (Say in James, 1823) -- valid -- Black Rat Snake, Pilot Black Snake, Texas Ratsnake, Western Rat Snake
  Pantherophis ramspotti Crother, White, Savage, Eckstut, Graham and Gardner, 2011 -- valid -- Western Foxsnake
  Pantherophis slowinskii (Burbrink, 2002) -- valid -- Slowinski's Cornsnake
  Pantherophis spiloides (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Gray Rat Snake, Gray Ratsnake, Midland Rat Snake
  Pantherophis vulpinus (Baird and Girard, 1853) -- valid -- Eastern Fox Snake, Eastern Foxsnake
  Parahelicops Bourret, 1934 -- valid
  Parahelicops annamensis Bourret, 1934 -- valid -- Annam Keelback
  Parahelicops boonsongi Taylor and Elbel, 1958 -- invalid
  Paraphimophis rusticus (Cope, 1878) -- valid -- Culebra
  Pararhabdophis Bourret, 1934 -- valid
  Pararhabdophis chapaensis Bourret, 1934 -- valid -- Vietnam Water Snake
  Pararhadinaea albignaci Domergue, 1984 -- invalid
  Pararhadinaea melanogaster Boettger, 1898 -- valid -- Madagascar Burrowing Snake
  Pararhadinaea melanogaster marojejyensis Domergue, 1984 -- valid
  Pararhadinaea melanogaster melanogaster Boettger, 1898 -- valid
  Parastenophis betsileanus (Günther, 1880) -- valid
  Paratapinophis Angel, 1929 -- valid
  Paratapinophis praemaxillaris Angel, 1929 -- valid -- Angel's Mountain Keelback, Brown Stream Snake
  Pareas boulengeri (Angel, 1920) -- valid -- Boulenger's Slug Snake
  Pareas carinatus (H. Boie, 1828) -- valid -- Keeled Slug Snake
  Pareas carinatus carinatus (H. Boie, 1830) -- valid
  Pareas carinatus unicolor (Bourret, 1934) -- valid
  Pareas chinensis (Barbour, 1912) -- valid -- Chinese Slug Snake
  Pareas formosensis (Van Denburgh, 1909) -- valid -- Formosa Slug Snake, Taiwan Slug Snake
  Pareas hamptoni (Boulenger, 1905) -- valid -- Hampton's Slug Snake
  Pareas iwasakii (Maki, 1937) -- valid
  Pareas margaritophorus (Jan, 1866) -- valid -- Mountain Slug Snake
  Pareas monticola (Cantor, 1839) -- valid -- Common Slug Snake
  Pareas nigriceps Guo and Deng, 2009 -- valid -- Xiaoheishan Slug-eater Snake
  Pareas nuchalis (Boulenger, 1900) -- valid
  Pareas stanleyi (Boulenger, 1914) -- valid -- Stanley's Slug Snake
  Pareatidae -- invalid
  Pelophis schoutedeni de Witte, 1942 -- invalid
  Phalotris bilineatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Phalotris concolor Ferrarezzi, 1993 -- valid
  Phalotris cuyanus (Cei, 1984) -- valid
  Phalotris labiomaculatus De Lema, 2002 -- valid
  Phalotris lativittatus Ferrarezzi, 1993 -- valid
  Phalotris lemniscatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Duméril's Diadem Snake
  Phalotris lemniscatus divittatus (Lema, 1984) -- valid
  Phalotris lemniscatus iheringi (Strauch, 1884) -- valid
  Phalotris lemniscatus lemniscatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Phalotris lemniscatus trilineatus (Boulenger, 1889) -- valid
  Phalotris matogrossensis Lema, d'Agostini and Cappelari, 2005 -- valid -- Mato Grosso Burrowing Snake
  Phalotris mertensi (Hoge, 1955) -- valid
  Phalotris multipunctatus Puorto and Ferrarezzi, 1993 -- valid
  Phalotris nasutus (Gomes, 1915) -- valid
  Phalotris nigrilatus Ferrarezzi, 1993 -- valid
  Phalotris sansebastiani Jansen and Köhler, 2008 -- valid
  Phalotris tricolor (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Tricolored Burrowing Snake
  Philodryas aestiva (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Brazilian Green Racer
  Philodryas aestiva aestiva (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Philodryas aestiva subcarinatus Boulenger, 1902 -- valid
  Philodryas agassizii (Jan, 1863) -- valid -- Burrowing Night Snake
  Philodryas argentea (Daudin, 1803) -- valid -- Striped Sharpnose Snake
  Philodryas baroni Berg, 1895 -- valid -- Baron's Green Racer
  Philodryas chamissonis (Wiegmann, 1835) -- valid -- Chilean Green Racer
  Philodryas cordata Donnelly and Myers, 1991 -- valid
  Philodryas georgeboulengeri Grazziotin, Zaher, Murphy, Scrocchi, Benavides, Zhang and Bonatto, 2012 -- valid -- Southern Sharpnose Snake
  Philodryas laticeps Werner, 1900 -- valid
  Philodryas livida (Amaral, 1923) -- valid
  Philodryas mattogrossensis Koslowsky, 1898 -- valid -- Miranda Green Racer
  Philodryas nattereri Steindachner, 1870 -- valid -- Paraguay Green Racer
  Philodryas olfersii (Lichtenstein, 1823) -- valid -- Lichtenstein's Green Racer
  Philodryas olfersii herbeus (Wied-Neuwied, 1825) -- valid
  Philodryas olfersii latirostris Cope, 1863 -- valid
  Philodryas olfersii olfersii (Lichtenstein, 1823) -- valid
  Philodryas patagoniensis (Girard, 1858) -- valid -- Patagonia Green Racer
  Philodryas psammophidea Günther, 1872 -- valid -- Günther's Green Racer
  Philodryas simonsii Boulenger, 1900 -- valid
  Philodryas tachymenoides (Schmidt and Walker, 1943) -- valid -- Schmidt's Green Racer
  Philodryas trilineata (Burmeister, 1861) -- valid
  Philodryas viridissima (Linnaeus, 1758) -- valid -- Common Green Racer
  Philothamnus angolensis Bocage, 1882 -- valid -- Western Green Snake
  Philothamnus battersbyi Loveridge, 1951 -- valid -- Battersby's Green Snake
  Philothamnus bequaerti (Schmidt, 1923) -- valid -- Bequaert's Green Snake
  Philothamnus carinatus (Andersson, 1901) -- valid -- Thirteen-scaled Green Snake
  Philothamnus dorsalis (Bocage, 1866) -- valid -- Striped Green Snake, Striped Wood Snake
  Philothamnus girardi Bocage, 1893 -- valid -- Annobon Wood Snake, Girard's Green Snake
  Philothamnus heterodermus (Hallowell, 1857) -- valid -- Emerald Green Snake, Variable Green Snake
  Philothamnus heterolepidotus (Günther, 1863) -- valid -- Slender Green Snake
  Philothamnus hoplogaster (Günther, 1863) -- valid -- Green Water Snake, Southeastern Green Snake
  Philothamnus hughesi Trape and Roux-Esteve, 1990 -- valid -- Hughes' Green Snake
  Philothamnus irregularis (Leach, 1819) -- valid -- Irregular Green Snake, Northern Green Bush Snake
  Philothamnus macrops (Boulenger, 1895) -- valid -- Usambara Green Snake
  Philothamnus natalensis (A. Smith, 1848) -- valid -- Natal Green Snake
  Philothamnus natalensis natalensis (A. Smith, 1848) -- valid -- Natal Green Snake
  Philothamnus natalensis occidentalis Broadley, 1966 -- valid -- Eastern Green Snake
  Philothamnus nitidus (Günther, 1863) -- valid -- Cameroons Wood Snake, Green Bush Snake
  Philothamnus nitidus loveridgei Laurent, 1960 -- valid
  Philothamnus nitidus nitidus (Günther, 1865) -- valid
  Philothamnus ornatus Bocage, 1872 -- valid -- Ornate Green Snake
  Philothamnus punctatus Peters, 1867 -- valid -- Spotted Green Snake
  Philothamnus ruandae Loveridge, 1951 -- valid -- Ruanda Emerald Green Snake, Rwanda Forest Green Snake
  Philothamnus semivariegatus (A. Smith, 1840) -- valid -- Spotted Bush Snake, Variegated Green Snake
  Philothamnus thomensis Bocage, 1882 -- valid -- Sao Tome Wood Snake
  Phimophis guerini (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Argentine Pampas Snake
  Phimophis guianensis (Troschel, 1848) -- valid -- Troschel's Pampas Snake
  Phimophis vittatus (Boulenger, 1896) -- valid -- Banded Pampas Snake
  Phisalixella arctifasciata (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Phisalixella iarakaensis (Domergue, 1994) -- valid
  Phisalixella tulearensis (Domergue, 1995) -- valid
  Phisalixella variabilis (Boulenger, 1896) -- valid
  Phyllorhynchus browni Stejneger, 1890 -- valid -- Culebra-nariz lanceolada ensillada, Saddled Leaf-nosed Snake, Saddled Leafnose Snake
  Phyllorhynchus decurtatus (Cope, 1868) -- valid -- Culebra-nariz lanceolada pinta, Spotted Leaf-nosed Snake, Spotted Leafnose Snake
  Pituophis catenifer (Blainville, 1835) -- valid -- Bullsnake, Gopher Snake
  Pituophis catenifer affinis Hallowell, 1852 -- valid -- Sonoran Gopher Snake
  Pituophis catenifer annectens Baird and Girard, 1853 -- valid -- San Diego Gopher Snake
  Pituophis catenifer bimaris Klauber, 1946 -- invalid
  Pituophis catenifer catenifer (Blainville, 1835) -- valid -- Pacific Gopher Snake
  Pituophis catenifer deserticola Stejneger, 1893 -- valid -- Great Basin Gopher Snake
  Pituophis catenifer fulginatus Klauber, 1946 -- valid
  Pituophis catenifer insulanus Klauber, 1946 -- valid
  Pituophis catenifer pumilis Klauber, 1946 -- valid -- Santa Cruz Gopher Snake
  Pituophis catenifer sayi (Schlegel, 1837) -- valid -- Bullsnake
  Pituophis deppei (A. M. C. Duméril, 1853) -- valid -- Culebra-sorda mexicana, Mexican Bull Snake, Mexican Pine Snake
  Pituophis deppei deppei (A. M. C. Duméril, 1853) -- valid
  Pituophis deppei jani (Cope, 1861) -- valid
  Pituophis lineaticollis (Cope, 1861) -- valid -- Cincuate Bull Snake, Culebra-sorda centroamericana, Middle American Gopher Snake
  Pituophis lineaticollis gibsoni Stuart, 1954 -- valid
  Pituophis lineaticollis lineaticollis (Cope, 1861) -- valid
  Pituophis melanoleucus (Daudin, 1803) -- valid -- Culebra-sorda toro, Eastern Pine Snake, Pine Snake, Pinesnake
  Pituophis melanoleucus lodingi Blanchard, 1924 -- valid -- Black Pine Snake
  Pituophis melanoleucus melanoleucus (Daudin, 1803) -- valid -- Northern Pine Snake
  Pituophis melanoleucus mugitus Barbour, 1921 -- valid -- Florida Pine Snake
  Pituophis ruthveni Stull, 1929 -- valid -- Louisiana Pine Snake, Louisiana Pinesnake
  Pituophis vertebralis (Blainville, 1835) -- valid -- Cape Gopher Snake
  Plagiopholis blakewayi Boulenger, 1893 -- valid -- Blakeway's Mountain Snake
  Plagiopholis delacouri Angel, 1929 -- valid
  Plagiopholis nuchalis (Boulenger, 1893) -- valid -- Assam Mountain Snake
  Plagiopholis styani (Boulenger, 1899) -- valid -- Chinese Mountain Snake
  Plagiopholis unipostocularis Zhao, Jiang and Huang, 1978 -- invalid
  Platyceps afarensis Schätti and Ineich, 2004 -- valid
  Platyceps brevis (Boulenger, 1895) -- valid -- Short Racer, Somali Racer
  Platyceps brevis brevis (Boulenger, 1895) -- valid
  Platyceps brevis smithii (Boulenger, 1895) -- valid -- Smith's Racer
  Platyceps collaris (Müller, 1878) -- valid
  Platyceps elegantissimus (Günther, 1878) -- valid -- Elegant Racer
  Platyceps florulentus (Geoffroy de St-Hilaire, 1827) -- valid -- Flowered Racer, Geoffroys' Racer
  Platyceps florulentus florulentus (Geoffroy, 1827) -- valid
  Platyceps florulentus keniensis (Parker, 1932) -- valid
  Platyceps florulentus perreti (Schätti, 1988) -- valid
  Platyceps karelini (Brandt, 1838) -- valid -- Spotted Desert Racer
  Platyceps karelini chesneii (Martin, 1838) -- valid
  Platyceps karelini karelini (Brandt, 1838) -- valid
  Platyceps karelini mintonorum (Mertens, 1969) -- valid
  Platyceps karelini rogersi (Anderson, 1893) -- invalid
  Platyceps ladacensis (Anderson, 1871) -- valid -- Braid Snake, Jan's Cliff Racer
  Platyceps largeni (Schätti, 2001) -- valid -- Dahlak Racer
  Platyceps messanai (Schätti and Lanza, 1989) -- valid -- Schätti's Racer
  Platyceps najadum (Eichwald, 1831) -- valid -- Dahl's Whip Snake, Slender Whip Snake
  Platyceps najadum albitemporalis (Darevsky and Orlov, 1994) -- valid
  Platyceps najadum atayevi (Tuniyev and Shammakov, 1993) -- valid
  Platyceps najadum dahlii (Schinz, 1833) -- valid
  Platyceps najadum kalymnensis (B. Schneider, 1979) -- valid
  Platyceps najadum najadum (Eichwald, 1831) -- valid
  Platyceps najadum schmidtleri (Schätti and McCarthy, 2001) -- valid
  Platyceps rhodorachis (Jan, 1865) -- valid -- Common Cliff Racer, Desert Racer, Jan's Cliff Racer, Wadi Racer
  Platyceps rhodorachis rhodorachis (Jan, 1865) -- valid
  Platyceps rhodorachis subniger (Boettger, 1893) -- valid
  Platyceps somalicus (Boulenger, 1896) -- valid -- Ogaden Racer
  Platyceps tessellata (Werner, 1910) -- valid
  Platyceps variabilis (Boulenger, 1905) -- valid -- Variable Snake
  Platyceps ventromaculatus (Gray, 1834) -- valid -- Glossy-bellied Racer, Hardwicke's Rat Snake
  Platyceps ventromaculatus bengalensis (Khan and Khan, 2000) -- valid
  Platyceps ventromaculatus indusai (Khan and Khan, 2000) -- valid
  Platyceps ventromaculatus ventromaculatus (Gray, 1834) -- valid
  Plesiodipsas perijanensis (Aleman, 1953) -- valid -- Aleman's Snail-eater
  Pliocercus elapoides Cope, 1860 -- valid -- Culebra-imita coral común, Variegated False Coral Snake
  Pliocercus elapoides aequalis Salvin, 1861 -- valid
  Pliocercus elapoides celatus H. M. Smith, 1943 -- invalid
  Pliocercus elapoides diastemus (Bocourt, 1886) -- valid
  Pliocercus elapoides elapoides Cope, 1860 -- valid
  Pliocercus elapoides laticollaris H. M. Smith, 1941 -- invalid
  Pliocercus elapoides salvinii Müller, 1878 -- invalid
  Pliocercus euryzonus Cope, 1862 -- valid -- Cope's False Coral Snake
  Pliocercus euryzonus burghardti H. M. Smith and Chiszar, 1996 -- valid
  Pliocercus euryzonus euryzonus Cope, 1862 -- valid
  Pliocercus wilmarai H. M. Smith, Perez-Higareda and Chiszar, 1996 -- valid
  Poecilopholis cameronensis Boulenger, 1903 -- valid -- Cameroon Racer
  Polemon acanthias (Reinhardt, 1860) -- valid -- Reinhardt's Snake-eater
  Polemon barthii Jan, 1858 -- valid -- Guinea Snake-eater
  Polemon bocourti Mocquard, 1897 -- valid -- Bocourt's Snake-eater
  Polemon christyi (Boulenger, 1903) -- valid -- Eastern Snake-eater
  Polemon collaris (Peters, 1881) -- valid -- Collared Snake-eater
  Polemon collaris brevior (de Witte and Laurent, 1947) -- valid
  Polemon collaris collaris (Peters, 1881) -- valid
  Polemon collaris longior (de Witte and Laurent, 1947) -- valid
  Polemon fulvicollis (Mocquard, 1887) -- valid -- African Snake-eater
  Polemon fulvicollis fulvicollis (Mocquard, 1887) -- valid
  Polemon fulvicollis graueri (Sternfeld, 1908) -- valid
  Polemon fulvicollis laurenti Resetar and Marx, 1981 -- valid
  Polemon gabonensis (A. H. A. Duméril, 1856) -- valid -- Gaboon Snake-eater
  Polemon gabonensis gabonensis (A. H. A. Duméril, 1856) -- valid
  Polemon gabonensis schmidti (de Witte and Laurent, 1947) -- valid
  Polemon gracilis (Boulenger, 1911) -- valid -- Graceful Snake-eater
  Polemon griseiceps (Laurent, 1947) -- valid -- Cameroon Snake-eater
  Polemon leopoldi (de Witte, 1941) -- invalid
  Polemon neuwiedi (Jan, 1858) -- valid -- Ivory Coast Snake-eater, Neuwied's Polemon
  Polemon notatus (Peters, 1882) -- valid
  Polemon notatus aemulans (Wener, 1902) -- invalid
  Polemon notatus notatus (Peters, 1882) -- invalid
  Polemon robustus (de Witte and Laurent, 1943) -- valid -- Zaire Snake-eater
  Porthidium arcosae Schätti and Kramer, 1993 -- valid -- Manabi Hognose Pitviper
  Porthidium dunni (Hartweg and Oliver, 1938) -- valid -- Dunn's Hognose Viper, Nauyaca-nariz de cerdo oxaqueña
  Porthidium hespere (Campbell, 1976) -- valid -- Nauyaca-nariz de cerdo de Tecomán, Western Hognose Viper
  Porthidium lansbergii (Schlegel, 1841) -- valid
  Porthidium lansbergii hutmanni (Sandner-Montilla, 1989) -- valid
  Porthidium lansbergii lansbergii (Schlegel, 1841) -- valid
  Porthidium lansbergii rozei (Peters, 1968) -- valid
  Porthidium nasutum (Bocourt, 1868) -- valid -- Hognosed Pit Viper, Nauyaca-nariz de cerdo narigona
  Porthidium ophryomegas (Bocourt, 1868) -- valid -- Slender Hognose Viper
  Porthidium porrasi Lamar, 2003 -- valid
  Porthidium volcanicum Solórzano, 1995 -- valid
  Porthidium yucatanicum (H. M. Smith, 1941) -- valid -- Nauyaca-nariz de cerdo yucateca
  Proatheris superciliaris (Peters, 1855) -- valid -- Domino-bellied Viper, Lowland Swamp Viper, Lowland Viper
  Prosymna ambigua Bocage, 1873 -- valid
  Prosymna ambigua ambigua Bocage, 1873 -- valid -- East African Shovelsnout
  Prosymna ambigua bocagii Boulenger, 1897 -- valid -- Northeast Congo Shovel-snout
  Prosymna angolensis Boulenger, 1915 -- valid -- Angola Shovel-snout
  Prosymna bivittata Werner, 1903 -- valid -- Twin-striped Shovel-snout, Two-striped Shovel-snout
  Prosymna frontalis (Peters, 1867) -- valid -- Southwestern African Shovel-snout
  Prosymna greigerti Mocquard, 1906 -- valid
  Prosymna greigerti collaris Sternfeld, 1908 -- valid
  Prosymna greigerti greigerti Mocquard, 1906 -- valid
  Prosymna janii Bianconi, 1862 -- valid -- Keel-scaled Shovel-snout, Mozambique Shovel-snout
  Prosymna lineata (Peters, 1871) -- valid -- Lined Shovel-snout
  Prosymna meleagris (Reinhardt, 1843) -- valid -- Ghana Shovel-snout, Speckled Shovel-snout Snake
  Prosymna ornatissima Barbour and Loveridge, 1928 -- valid -- Ornate Shovelsnout Snake
  Prosymna pitmani Battersby, 1951 -- valid -- Multi-scaled Shovel-snout, Pitman's Shovelsnout Snake
  Prosymna ruspolii (Boulenger, 1896) -- valid -- Ruspoli's Shovelsnout Snake, Southern Somaliland Shovel-snout
  Prosymna semifasciata Broadley, 1995 -- valid -- Banded Shovel-snout
  Prosymna somalica Parker, 1930 -- valid -- Northern Somali Shovelsnout Snake, Ogaden Racer
  Prosymna stuhlmanni (Pfeffer, 1893) -- valid -- East African Shovel-snout
  Prosymna sundevalli (A. Smith, 1849) -- valid
  Prosymna visseri Fitzsimons, 1959 -- valid -- Visser's Shovel-snout
  Protobothrops cornutus (M. A. Smith, 1930) -- valid -- Horned Pit Viper
  Protobothrops dabieshanensis Huang, Pan, Han, L. Zhang, Hou, Yu, Zheng and B. Zhang, 2012 -- valid -- Dabie Mountains Pit Viper
  Protobothrops elegans (Gray, 1849) -- valid -- Elegant Pitviper
  Protobothrops flavoviridis (Hallowell, 1861) -- valid -- Habu
  Protobothrops flavoviridis flavoviridis (Hallowell, 1861) -- valid
  Protobothrops flavoviridis tinkhami (Gloyd, 1955) -- valid
  Protobothrops himalayanus Pan, Chettri, Yang, Jiang, Wang, L. Zhang and Vogel, 2013 -- valid
  Protobothrops jerdonii (Günther, 1875) -- valid -- Jerdon's Pitviper
  Protobothrops jerdonii bourreti (Klemmer, 1963) -- valid -- Bourret's Pitviper
  Protobothrops jerdonii jerdonii (Günther, 1875) -- valid -- Jerdon's Pitviper
  Protobothrops jerdonii xanthomelas (Günther, 1889) -- valid -- Red Spotted Pitviper
  Protobothrops kaulbacki (M. A. Smith, 1940) -- valid -- Kaulback's Lance-headed Pitviper
  Protobothrops mangshanensis (Zhao, 1990) -- valid -- Mang Mountain Pitviper, Mangshan Pitviper, Mt. Mang Pitviper
  Protobothrops maolanensis Yang, Orlov and Wang, 2011 -- valid -- Mao-lan Pitviper
  Protobothrops mucrosquamatus (Cantor, 1839) -- valid -- Brown Spotted Pitviper
  Protobothrops sieversorum (Ziegler, Herrmann, David, Orlov and Pauwels, 2000) -- valid -- Three Horned-scaled Pitviper
  Protobothrops tokarensis (Nagai, 1928) -- valid -- Tokara Habu
  Protobothrops trungkhanhensis Orlov, Ryabov and Nguyen, 2009 -- valid -- Trungkhanh Pitviper
  Protobothrops xiangchengensis (Zhao, Jiang and Huang, 1979) -- valid -- Kham Plateau Pitviper, Szechwan Pit Viper
  Psammodynastes pictus Günther, 1858 -- valid -- Painted Mock Viper, Spotted Mock Viper
  Psammodynastes pulverulentus (F. Boie, 1827) -- valid -- Common Mock Viper
  Psammodynastes pulverulentus papenfussi Zhao, 1995 -- valid
  Psammodynastes pulverulentus pulverulentus (F. Boie, 1827) -- valid
  Psammophis aegyptius Marx, 1958 -- valid
  Psammophis angolensis (Bocage, 1872) -- valid -- Dwarf Sand Snake
  Psammophis ansorgii Boulenger, 1905 -- valid -- Link-marked Sand Racer
  Psammophis biseriatus Peters, 1881 -- valid -- Link-marked Sand Snake, Two-striped Sand Racer
  Psammophis brevirostris Peters, 1881 -- valid -- Short-snouted Grass Snake
  Psammophis cerasogaster Cantor, 1839 -- invalid
  Psammophis condanarus (Merrem, 1820) -- valid -- Sand Snake
  Psammophis crucifer (Daudin, 1803) -- valid -- Cross-marked Grass Snake, Montane Grass Snake
  Psammophis elegans (Shaw, 1802) -- valid -- Elegant Sand Racer
  Psammophis elegans elegans (Shaw, 1802) -- valid
  Psammophis elegans univittatus Perret, 1961 -- valid
  Psammophis indochinensis M. A. Smith, 1943 -- valid
  Psammophis jallae Peracca, 1896 -- valid -- Jalla's Sand Snake
  Psammophis leightoni Boulenger, 1902 -- valid -- Cape Sand Snake
  Psammophis leithii Günther, 1869 -- valid -- Pakistan Sand Racer, Pakistani Ribbon Snake
  Psammophis leopardinus Bocage, 1887 -- valid -- Leopard Grass Snake, Leopard Sand Snake
  Psammophis lineatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Lined Olympic Snake
  Psammophis lineolatus (Brandt, 1838) -- valid -- Steppe Ribbon Racer
  Psammophis longifrons Boulenger, 1896 -- valid -- Long Sand Racer, Stocky Sand Snake
  Psammophis mossambicus Peters, 1882 -- valid -- Olive Whip Snake
  Psammophis namibensis Broadley, 1975 -- valid -- Namib Sand Snake
  Psammophis notostictus Peters, 1867 -- valid -- Karoo Sand Snake, Karoo Whip Snake, Whip Snake
  Psammophis orientalis Broadley, 1977 -- valid -- Eastern Stripe-bellied Sand Snake
  Psammophis phillipsii (Hallowell, 1844) -- valid -- Olive Grass Racer, Phillips' Sand Snake
  Psammophis praeornatus (Schlegel, 1837) -- valid -- Ornate Olympic Snake
  Psammophis praeornatus gribinguiensis (Angel, 1921) -- valid
  Psammophis praeornatus praeornatus (Schlegel, 1837) -- valid
  Psammophis pulcher Boulenger, 1895 -- valid -- Beautiful Sand Snake, Boulenger's Sand Racer
  Psammophis punctulatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Speckled Sand Racer
  Psammophis punctulatus punctulatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Psammophis punctulatus trivirgatus Peters, 1878 -- valid
  Psammophis rukwae Broadley, 1966 -- valid -- Rukwa Sand Racer
  Psammophis rukwae leucogaster Spawls, 1983 -- valid
  Psammophis rukwae rukwae Broadley, 1966 -- valid
  Psammophis schokari (Forskal, 1775) -- valid -- Forskal Sand Snake, Schokari Sand Racer
  Psammophis sibilans (Linnaeus, 1758) -- valid -- Hissing Sand Snake, Striped Sand Snake
  Psammophis subtaeniatus Peters, 1882 -- valid -- Stripe-bellied Sand Snake
  Psammophis sudanensis Werner, 1919 -- valid
  Psammophis tanganicus Loveridge, 1940 -- valid -- Tanganyika Sand Snake, Western Link-marked Sand Racer
  Psammophis trigrammus Günther, 1865 -- valid -- Western Sand Snake
  Psammophis trinasalis Werner, 1902 -- valid -- Fork-marked Sand Snake
  Psammophis zambiensis Hughes, 2002 -- valid -- Zambian Whip Snake
  Psammophylax acutus (Günther, 1888) -- valid -- Beaked Skaapsteker, Striped Beaked Snake
  Psammophylax acutus acutus (Günther, 1888) -- valid
  Psammophylax acutus jappi (Broadley, 1971) -- valid
  Psammophylax acutus togoensis (Matschie, 1893) -- invalid
  Psammophylax rhombeatus (Linnaeus, 1758) -- valid -- Rhombic Skaapsteker, Spotted Skaapsteker
  Psammophylax tritaeniatus (Günther, 1868) -- valid -- Striped Skaapsteker, Three-lined Grass Snake
  Psammophylax tritaeniatus subniger Laurent, 1956 -- valid
  Psammophylax tritaeniatus tritaeniatus (Günther, 1868) -- valid
  Psammophylax tritaeniatus vanoyei Laurent, 1956 -- valid
  Psammophylax variabilis Günther, 1893 -- valid -- Grey-bellied Grass Snake, Grey-bellied Skaapsteker
  Pseudalsophis biserialis (Günther, 1860) -- valid -- Galapagos Racer
  Pseudalsophis biserialis biserialis (Günther, 1860) -- valid
  Pseudalsophis biserialis eibli (Mertens, 1960) -- valid
  Pseudalsophis dorsalis (Steindachner, 1876) -- valid
  Pseudalsophis dorsalis helleri (Van Denburgh, 1912) -- invalid
  Pseudalsophis elegans (Tschudi, 1845) -- valid
  Pseudalsophis elegans elegans (Tschudi, 1845) -- valid
  Pseudalsophis elegans rufodorsatus (Günther, 1858) -- valid
  Pseudalsophis hoodensis (Van Denburgh, 1912) -- valid
  Pseudalsophis slevini (Van Denburgh, 1912) -- valid -- Banded Galapagos Snake
  Pseudalsophis steindachneri (Van Denburgh, 1912) -- valid -- Striped Galapagos Snake
  Pseudaspis cana (Linnaeus, 1758) -- valid -- Mole Snake
  Pseudelaphe flavirufa (Cope, 1867) -- valid -- Culebra-ratonera tropical, Yellow-red Rat Snake
  Pseudelaphe flavirufa flavirufa (Cope, 1867) -- valid
  Pseudelaphe flavirufa matudai (H. M. Smith, 1941) -- valid
  Pseudelaphe flavirufa pardalina (Peters, 1869) -- valid
  Pseudelaphe flavirufa polystichus (H. M. Smith and Williams, 1966) -- invalid
  Pseudoboa coronata Schneider, 1801 -- valid -- Crowned False Boa
  Pseudoboa haasi (Boettger, 1905) -- valid -- Paraná False Boa
  Pseudoboa martinsi Zaher, Oliveira and Franco, 2008 -- valid
  Pseudoboa neuwiedii (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Coal Snake, Neuwied's False Boa
  Pseudoboa nigra (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Black False Boa
  Pseudoboa serrana Morato, Moura-Leite, Prudente and Bérnils, 1995 -- valid
  Pseudoboodon boehmei Rasmussen and Largen, 1992 -- valid -- Böhme's Ethiopian Snake
  Pseudoboodon gascae Peracca, 1897 -- valid -- Gasca's Ethiopian Snake
  Pseudoboodon lemniscatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Banded Snake, Striped Ethiopian Snake
  Pseudoboodon sandfordorum Spawls, 2004 -- valid -- Sandford's Ethiopian Snake
  Pseudocerastes fieldi K. P. Schmidt, 1930 -- valid -- Field's Horned Viper
  Pseudocerastes persicus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Persian Horned Viper
  Pseudocerastes urarachnoides Bostanchi, Anderson, Kami and Papenfuss, 2006 -- valid
  Pseudoeryx plicatilis (Linnaeus, 1758) -- valid -- South American Pond Snake
  Pseudoeryx plicatilis mimeticus Cope, 1885 -- valid
  Pseudoeryx plicatilis plicatilis (Linnaeus, 1758) -- valid
  Pseudoeryx relictualis Schargel, Rivas-Fuenmayor, Barros, Péfaur and Navarette, 2007 -- valid -- South American Pond Snake
  Pseudoficimia frontalis (Cope, 1864) -- valid -- Culebra ilamacoa, False Ficimia
  Pseudoleptodeira latifasciata (Günther, 1894) -- valid -- Culebra-ojo de gato-falsa cabeza roja, False Cat-eyed Snake
  Pseudorabdion albonuchalis (Günther, 1896) -- valid
  Pseudorabdion ater (Taylor, 1922) -- valid
  Pseudorabdion collaris (Mocquard, 1892) -- valid -- Common Collared Snake
  Pseudorabdion eiselti Inger and Leviton, 1961 -- valid
  Pseudorabdion longiceps (Cantor, 1847) -- valid -- Cantor's Dwarf Reed Snake, Dwarf Reed Snake
  Pseudorabdion mcnamarae (Taylor, 1917) -- valid -- McNamara's Burrowing Snake
  Pseudorabdion modiglianii Doria and Petri, 2010 -- valid -- Modigliani's Dwarf Reed Snake
  Pseudorabdion montanum Leviton and Brown, 1959 -- valid -- Mountain Burrowing Snake
  Pseudorabdion oxycephalum (Günther, 1858) -- valid -- Günther's Dwarf Reed Snake
  Pseudorabdion sarasinorum (Müller, 1895) -- valid -- Sarasin's Reed Snake
  Pseudorabdion saravacense (Shelford, 1901) -- valid
  Pseudorabdion sirambense Doria and Petri, 2010 -- valid
  Pseudorabdion talonuran Brown, Leviton and Sison, 1999 -- valid -- Panay Island Reed Snake
  Pseudorabdion taylori Leviton and Brown, 1959 -- valid -- Taylor's Burrowing Snake
  Pseudotomodon trigonatus (Leybold, 1873) -- valid -- False Tomodon Snake
  Pseudoxenodon bambusicola Vogt, 1922 -- valid -- Bamboo Snake
  Pseudoxenodon baramensis (M. A. Smith, 1921) -- valid -- Baramen Bamboo Snake
  Pseudoxenodon inornatus (F. Boie, 1827) -- valid -- Dull Bamboo Snake, Javanese False Cobra
  Pseudoxenodon inornatus buettikoferi Brongersma and Helle, 1951 -- valid
  Pseudoxenodon inornatus inornatus (F. Boie, 1827) -- valid
  Pseudoxenodon inornatus jacobsonii Lidth de Jeude, 1922 -- valid
  Pseudoxenodon karlschmidti Pope, 1928 -- valid -- Chinese Bamboo Snake
  Pseudoxenodon karlschmidti karlschmidti Pope, 1935 -- valid
  Pseudoxenodon karlschmidti popei Gressitt, 1936 -- valid
  Pseudoxenodon karlschmidti sinii Fan, 1931 -- valid
  Pseudoxenodon macrops (Blyth, 1855) -- valid -- Big-eyed Bamboo Snake, Large-eyed Bamboo Snake, Mock Cobra
  Pseudoxenodon macrops fukiensis Pope, 1928 -- valid
  Pseudoxenodon macrops macrops (Blyth, 1855) -- valid
  Pseudoxenodon macrops sinensis Boulenger, 1904 -- valid
  Pseudoxenodon stejnegeri Barbour, 1908 -- valid -- Stejneger's Bamboo Snake
  Pseudoxenodon stejnegeri stejnegeri Barbour, 1908 -- valid
  Pseudoxenodon stejnegeri striaticaudatus Pope, 1928 -- valid
  Pseudoxenodontidae -- invalid
  Pseudoxyrhopus ambreensis Mocquard, 1895 -- valid -- Ambre Brook Snake
  Pseudoxyrhopus analabe Nussbaum, Andreone and Raxworthy, 1998 -- valid
  Pseudoxyrhopus ankafinaensis Raxworthy and Nussbaum, 1994 -- valid
  Pseudoxyrhopus heterurus (Jan, 1863) -- valid -- Night Brook Snake
  Pseudoxyrhopus imerinae (Günther, 1890) -- valid -- Plateau Brook Snake
  Pseudoxyrhopus kely Raxworthy and Nussbaum, 1994 -- valid
  Pseudoxyrhopus microps Günther, 1881 -- valid -- Brown Brook Snake
  Pseudoxyrhopus oblectator Cadle, 1999 -- valid
  Pseudoxyrhopus quinquelineatus (Günther, 1881) -- valid -- Striped Brook Snake
  Pseudoxyrhopus sokosoko Raxworthy and Nussbaum, 1994 -- valid
  Pseudoxyrhopus tritaeniatus Mocquard, 1894 -- valid
  Pseustes cinnamomeus (Wagler, 1824) -- invalid
  Pseustes poecilonotus (Günther, 1858) -- invalid -- Culebra resoplona norteña
  Pseustes sexcarinatus (Wagler, 1824) -- invalid
  Pseustes shropshirei (Barbour and Amaral, 1924) -- invalid
  Psomophis genimaculatus (Boettger, 1885) -- valid -- Spirit Diminutive Snake, Spirit Ground Snake
  Psomophis joberti (Sauvage, 1884) -- valid
  Psomophis obtusus (Cope, 1864) -- valid -- Wide Ground Snake
  Ptyas carinata (Günther, 1858) -- valid -- Keeled Rat Snake
  Ptyas dhumnades (Cantor, 1842) -- valid
  Ptyas dipsas (Schlegel, 1837) -- valid -- Sulawesi Black Racer
  Ptyas fusca (Günther, 1858) -- valid -- Brown Rat Snake, White-bellied Rat Snake
  Ptyas korros (Schlegel, 1837) -- valid -- Chinese Ratsnake, Indo-Chinese Rat Snake
  Ptyas luzonensis (Günther, 1873) -- valid -- Smooth-Scaled Mountain Rat Snake
  Ptyas mucosa (Linnaeus, 1758) -- valid -- Dhaman, Oriental Ratsnake
  Ptyas nigromarginata (Blyth, 1854) -- valid -- Black-bordered Rat Snake, Green Rat Snake
  Ptychophis flavovirgatus Gomes, 1915 -- valid -- Fanged Water Snake
  Pythonodipsas carinata Günther, 1868 -- valid -- Western Keeled Snake
  Rabdion forsteni A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Forsten's Pointed Snake
  Regina Baird and Girard, 1853 -- valid -- Crayfish Snakes
  Regina grahamii Baird and Girard, 1853 -- valid -- Graham's Crayfish Snake
  Regina septemvittata (Say, 1825) -- valid -- Queen Snake, Queensnake
  Regina valida Kennicott, 1860 -- invalid
  Rhabdophis Fitzinger, 1843 -- valid
  Rhabdophis adleri Zhao, 1997 -- valid
  Rhabdophis akraios Doria, Petri, Bellati, Tiso and Pistarino, 2013 -- valid -- Singalang Keelback
  Rhabdophis angeli (Bourret, 1934) -- invalid -- Angel's Keelback
  Rhabdophis auriculata (Günther, 1858) -- invalid -- White-lined Water Snake
  Rhabdophis auriculatus auriculatus (Günther, 1858) -- valid
  Rhabdophis auriculatus myersi Leviton, 1970 -- valid
  Rhabdophis barbouri (Taylor, 1922) -- valid -- Barbour's Water Snake
  Rhabdophis callichroma (Bourret, 1934) -- invalid -- Bavi Keelback
  Rhabdophis callistus (Günther, 1873) -- valid -- Boettger's Keelback
  Rhabdophis chrysargoides (Günther, 1858) -- valid -- Günther's Keelback
  Rhabdophis chrysargos (Schlegel, 1837) -- valid -- Specklebelly Keelback
  Rhabdophis conspicillatus (Günther, 1872) -- valid -- Red-bellied Keelback
  Rhabdophis guangdongensis Zhu, Wang, Takeuichi and Zhao, 2014 -- valid -- Guangdong Keelback
  Rhabdophis himalayanus (Günther, 1864) -- valid -- Orange-collared Keelback
  Rhabdophis leonardi (Wall, 1923) -- valid -- Leonard's Keelback
  Rhabdophis lineatus (Peters, 1861) -- valid
  Rhabdophis murudensis (M. A. Smith, 1925) -- valid -- Gunung Murud Keelback, Muruden Keelback
  Rhabdophis nigrocinctus (Blyth, 1856) -- valid -- Banded Keelback, Green Keelback
  Rhabdophis nuchalis (Boulenger, 1891) -- valid -- Hubei Keelback
  Rhabdophis pentasupralabialis Jiang and Zhao, 1983 -- valid
  Rhabdophis spilogaster (F. Boie, 1827) -- valid -- Boie's Keelback
  Rhabdophis subminiatus (Schlegel, 1837) -- valid -- Red-necked Keelback
  Rhabdophis subminiatus helleri (Schmidt, 1925) -- valid
  Rhabdophis subminiatus subminiatus (Schlegel, 1837) -- valid
  Rhabdophis swinhonis (Günther, 1868) -- valid -- Taiwan Keelback
  Rhabdophis tigrinus (F. Boie, 1826) -- valid -- Tiger Keelback
  Rhabdophis tigrinus formosanus (Maki, 1931) -- valid
  Rhabdophis tigrinus tigrinus (F. Boie, 1826) -- valid
  Rhabdops Boulenger, 1893 -- valid
  Rhabdops bicolor (Blyth, 1854) -- valid -- Brown Trapezoid Snake, Two-colored Forestsnake
  Rhabdops olivaceus (Beddome, 1863) -- valid -- Olive Trapezoid Snake
  Rhachidelus brazili Boulenger, 1908 -- valid -- Brazilian Bird Snake
  Rhadinaea bogertorum Myers, 1974 -- valid -- Culebra-café oaxaqueña, Oaxacan Graceful Brown Snake
  Rhadinaea calligaster (Cope, 1876) -- valid -- Thick Graceful Brown Snake
  Rhadinaea cuneata Myers, 1974 -- valid -- Culebra-café veracruzana, Veracruz Graceful Brown Snake
  Rhadinaea decorata (Günther, 1858) -- valid -- Adorned Graceful Brown Snake, Culebra-café adornada
  Rhadinaea flavilata (Cope, 1871) -- valid -- Pine Woods Littersnake, Pine Woods Snake
  Rhadinaea forbesi H. M. Smith, 1942 -- valid -- Culebra-café de Forbes, Forbes' Graceful Brown Snake
  Rhadinaea fulvivittis Cope, 1875 -- valid -- Culebra-café listada, Ribbon Graceful Brown Snake
  Rhadinaea gaigeae Bailey, 1937 -- valid -- Culebra-café de Gaige, Gaige's Pine Forest Snake
  Rhadinaea hesperia Bailey, 1940 -- valid -- Culebra-café de Occidente, Western Graceful Brown Snake
  Rhadinaea laureata (Günther, 1868) -- valid -- Crowned Graceful Brown Snake, Culebra-café coronada
  Rhadinaea macdougalli H. M. Smith and Langebartel, 1949 -- valid -- Culebra-café de MacDougall, MacDougall's Graceful Brown Snake
  Rhadinaea marcellae Taylor, 1949 -- valid -- Culebra-café de Marcella, Marcella's Graceful Brown Snake
  Rhadinaea montana H. M. Smith, 1944 -- valid -- Culebra-café de Nuevo León, Nuevo Leon Graceful Brown Snake
  Rhadinaea myersi Rossman, 1965 -- valid -- Culebra-café de Meyer, Myers' Graceful Brown Snake
  Rhadinaea omiltemana (Günther, 1894) -- valid -- Culebra-café guerrerense, Guerreran Pine Woods Snake
  Rhadinaea pulveriventris Boulenger, 1896 -- valid -- Common Graceful Brown Snake
  Rhadinaea quinquelineata Cope, 1886 -- valid -- Culebra-café poblana, Pueblan Graceful Brown Snake
  Rhadinaea sargenti Dunn and Bailey, 1939 -- valid -- Sargent's Graceful Brown Snake
  Rhadinaea taeniata (Peters, 1863) -- valid -- Culebra-café de pino-encino, Pine-Oak Snake
  Rhadinaea taeniata aemula Bailey, 1940 -- valid
  Rhadinaea taeniata taeniata (Peters, 1863) -- valid
  Rhadinaea vermiculaticeps (Cope, 1860) -- valid -- Vermiculate Graceful Brown Snake
  Rhadinella anachoreta (E. N. Smith and Campbell, 1994) -- valid
  Rhadinella godmani (Günther, 1865) -- valid -- Culebra-café de Godman, Godman's Graceful Brown Snake
  Rhadinella godmani godmani (Günther, 1865) -- valid
  Rhadinella godmani zilchi (Mertens, 1952) -- valid
  Rhadinella hannsteini (Stuart, 1949) -- valid -- Culebra-café labios manchados, Hannstein's Spot-lipped Snake
  Rhadinella hempsteadae (Stuart and Bailey, 1941) -- valid -- Culebra-café de Hempstead, Hempstead's Pine Woods Snake
  Rhadinella kanalchutchan (Mendelson and Kizirian, 1995) -- valid
  Rhadinella kinkelini (Boettger, 1898) -- valid -- Kinkelin Graceful Brown Snake
  Rhadinella lachrymans (Cope, 1870) -- valid -- Culebra-café llorona, Tearful Pine-Oak Snake
  Rhadinella montecristi (Mertens, 1952) -- valid -- Monte Cristi Graceful Brown Snake
  Rhadinella pegosalyta (McCranie, 2006) -- valid
  Rhadinella pilonaorum (Stuart, 1954) -- valid -- Stuart's Graceful Brown Snake
  Rhadinella posadasi (Slevin, 1936) -- valid -- Culebra-café de Posada, Posada's Graceful Brown Snake
  Rhadinella rogerromani (Köhler and McCranie, 1999) -- valid
  Rhadinella schistosa H. M. Smith, 1941 -- valid -- Brokencollar Graceful Brown Snake, Culebra-café collar-incompleto
  Rhadinella serperaster (Cope, 1871) -- valid
  Rhadinella tolpanorum (Holm and Cruz, 1994) -- valid
  Rhadinophanes monticola Myers and Campbell, 1981 -- valid -- Culebra de montaña, Graceful Mountain Snake
  Rhadinophis frenatus (Gray, 1853) -- invalid
  Rhadinophis prasinus (Blyth, 1854) -- invalid
  Rhagerhis moilensis (Reuss, 1834) -- valid -- Moila Snake
  Rhamnophis aethiopissa Günther, 1862 -- valid -- Large-eyed Green Treesnake, Splendid Dagger-tooth Tree Snake
  Rhamnophis aethiopissa aethiopissa Günther, 1862 -- valid
  Rhamnophis aethiopissa elgonensis Loveridge, 1929 -- valid
  Rhamnophis aethiopissa ituriensis Schmidt, 1923 -- valid
  Rhamnophis batesii (Boulenger, 1908) -- valid -- Spotted Dagger-tooth Tree Snake
  Rhamphiophis oxyrhynchus (Reinhardt, 1843) -- valid
  Rhamphiophis rostratus Peters, 1854 -- valid -- Rufous Beaked Snake
  Rhamphiophis rubropunctatus (Fischer, 1884) -- valid -- Red Beaked Snake, Red-spotted Beaked Snake
  Rhinechis scalaris (Schinz, 1822) -- invalid
  Rhinobothryum bovallii Andersson, 1916 -- valid
  Rhinobothryum lentiginosum (Scopoli, 1785) -- valid -- Amazon Banded Snake
  Rhinocheilus lecontei Baird and Girard, 1853 -- valid -- Culebra narigona, Long-nosed Snake, Longnose Snake
  Rhynchocalamus arabicus Schmidt, 1933 -- valid -- Aden Kukri Snake
  Rhynchocalamus barani Olgun, Avci, Ilgaz, Üzüm and Yilmaz, 2007 -- invalid
  Rhynchocalamus melanocephalus (Jan, 1862) -- valid -- Palestine Kukri Snake
  Rhynchocalamus melanocephalus satunini (Nikolsky, 1899) -- invalid
  Rhynchophis boulengeri Mocquard, 1897 -- invalid
  Rodriguesophis chui (Rodrigues, 1993) -- valid
  Rodriguesophis iglesiasi (Gomes, 1915) -- valid -- Gomes' Pampas Snake
  Rodriguesophis scriptorcibatus (Rodrigues, 1993) -- valid
  Salvadora bairdi Jan, 1860 -- valid -- Baird's Patchnose Snake, Culebra-parchada de Baird
  Salvadora grahamiae Baird and Girard, 1853 -- valid -- Culebra-parchada de montaña, Mountain Patch-nosed Snake, Mountain Patchnose Snake
  Salvadora grahamiae grahamiae Baird and Girard, 1853 -- valid -- Mountain Patchnose Snake
  Salvadora grahamiae lineata Schmidt, 1940 -- valid -- Texas Patch-nosed Snake
  Salvadora hexalepis (Cope, 1867) -- valid -- Culebra-parchada de cabestrillo, Western Patch-nosed Snake, Western Patchnose Snake
  Salvadora hexalepis deserticola Schmidt, 1940 -- invalid
  Salvadora hexalepis hexalepis (Cope, 1867) -- valid -- Desert Patchnose Snake
  Salvadora hexalepis mojavensis Bogert, 1945 -- valid -- Mojave Patchnose Snake
  Salvadora hexalepis virgultea Bogert, 1936 -- valid -- Coast Patchnose Snake
  Salvadora intermedia Hartweg, 1940 -- valid -- Culebra-parchada oaxaqueña, Oaxacan Patchnose Snake
  Salvadora lemniscata (Cope, 1895) -- valid -- Culebra-parchada del Pacífico, Pacific Patchnose Snake
  Salvadora mexicana (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-parchada mexicana, Mexican Patchnose Snake
  Sanzinia madagascariensis (Duméril and Bibron, 1844) -- valid
  Sanzinia madagascariensis madagascariensis (Duméril and Bibron, 1844) -- invalid
  Sanzinia madagascariensis volontany Vences and Glaw, 2004 -- invalid
  Saphenophis antioquiensis (Dunn, 1943) -- valid -- Dunn's Saphenophis Snake
  Saphenophis atahuallpae (Steindachner, 1901) -- valid -- Atahuallpa Saphenophis Snake
  Saphenophis boursieri (Jan, 1867) -- valid
  Saphenophis sneiderni Myers, 1973 -- valid -- Saphenophis Snake
  Saphenophis tristriatus (Rendahl and Vestergren, 1941) -- valid
  Scaphiodontophis annulatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-añadida guatemalteca, Guatemala Neckband Snake
  Scaphiodontophis annulatus annulatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Scaphiodontophis annulatus dugandi Roze, 1969 -- valid
  Scaphiodontophis annulatus hondurensis (Schmidt, 1936) -- valid
  Scaphiodontophis annulatus nothus Taylor and H. M. Smith, 1943 -- valid
  Scaphiodontophis venustissimus (Günther, 1893) -- valid -- Common Neckband Snake
  Scaphiophis albopunctatus Peters, 1870 -- valid -- African Shovel-nosed Snake
  Scaphiophis raffreyi Bocourt, 1875 -- valid -- Ethiopian Hook-nosed Snake
  Scolecophis atrocinctus (Schlegel, 1837) -- valid -- Black-banded Snake
  Scytale brachyorrhos F. Boie, 1827 -- invalid
  Seminatrix Cope, 1895 -- invalid -- Swamp Snakes, Swampsnakes
  Senticolis triaspis (Cope, 1866) -- valid -- Culebra oliva, Green Rat Snake, Green Ratsnake
  Senticolis triaspis intermedia (Boettger, 1883) -- valid -- Green Rat Snake
  Senticolis triaspis mutabilis (Cope, 1885) -- valid
  Senticolis triaspis triaspis (Cope, 1866) -- valid -- Green Rat Snake
  Sibon annulatus (Günther, 1872) -- valid -- Ringed Snail Sucker
  Sibon anthracops (Cope, 1868) -- valid -- Cope's Snail Sucker
  Sibon argus (Cope, 1876) -- valid -- Argus Snail Sucker
  Sibon carri (Shreve, 1951) -- valid -- Carr's Snail Sucker
  Sibon dimidiatus (Günther, 1872) -- valid -- Slender Snail Sucker
  Sibon dunni Peters, 1957 -- valid -- Dunn's Snail Sucker
  Sibon lamari Solorzano, 2001 -- valid
  Sibon linearis Perez-Higareda, Lopez-Luna and H. M. Smith, 2002 -- valid
  Sibon longifrenis (Stejneger, 1909) -- valid -- Lichen-colored Snail Sucker, Stejneger's Snail Sucker
  Sibon manzanaresi McCranie, 2007 -- valid
  Sibon merendonensis Rovito, Papenfuss and Vásquez-Almazán, 2012 -- valid
  Sibon miskitus McCranie, 2006 -- valid
  Sibon nebulatus (Linnaeus, 1758) -- valid -- Cloudy Snail Sucker, Cloudy Snail-eating Snake, Slug-eating Snake
  Sibon noalamina Lotzkat, Hertz and Köhler, 2012 -- valid
  Sibon perissostichon Köhler, Lotzkat and Hertz, 2010 -- valid
  Sibon sanniolus (Cope, 1866) -- valid -- Pigmy Snail Sucker
  Sibon sanniolus neilli Henderson, Hoevers and Wilson, 1977 -- valid
  Sibon sanniolus sanniolus (Cope, 1866) -- valid
  Sibynomorphus inaequifasciatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Sibynomorphus lavillai Scrocchi, Porto and Rey, 1993 -- valid
  Sibynomorphus mikanii (Schlegel, 1837) -- valid
  Sibynomorphus neuwiedi (Ihering, 1911) -- valid -- Neuwied's Tree Snake
  Sibynomorphus oligozonatus Orcés and Almendáriz, 1989 -- valid
  Sibynomorphus oneilli Rossman and Thomas, 1979 -- valid -- O'Neill's Tree Snake
  Sibynomorphus petersi Orcés and Almendáriz, 1989 -- valid
  Sibynomorphus turgidus (Cope, 1868) -- valid
  Sibynomorphus vagrans (Dunn, 1923) -- valid -- Dunn's Tree Snake
  Sibynomorphus vagus (Jan, 1863) -- valid -- Jan's Tree Snake
  Sibynomorphus ventrimaculatus (Boulenger, 1885) -- valid -- Boulenger's Tree Snake
  Sibynomorphus williamsi Carillo de Espinoza, 1974 -- valid -- Williams' Tree Snake
  Sibynophis bistrigatus (Günther, 1868) -- valid -- Günther's Many-tooth Snake
  Sibynophis bivittatus (Boulenger, 1894) -- valid -- White-striped Snake
  Sibynophis chinensis (Günther, 1889) -- valid -- Chinese Many-tooth Snake
  Sibynophis chinensis chinensis (Günther, 1889) -- valid
  Sibynophis chinensis grahami (Boulenger, 1904) -- valid
  Sibynophis chinensis miyiensis Zhao and Kou, 1987 -- valid
  Sibynophis collaris (Gray, 1853) -- valid -- Common Many-tooth Snake
  Sibynophis geminatus (H. Boie, 1826) -- valid -- Boie's Many-tooth Snake
  Sibynophis melanocephalus (Gray, 1835) -- valid -- Black-headed Collared Snake, Malayan Many-tooth Snake
  Sibynophis melanocephalus insularis Mertens, 1927 -- valid
  Sibynophis melanocephalus melanocephalus (Gray, 1835) -- valid
  Sibynophis sagittarius (Cantor, 1839) -- valid -- Cantor's Black-headed Snake
  Sibynophis subpunctatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Jerdon's Many-tooth Snake
  Sibynophis triangularis Taylor, 1965 -- valid -- Triangle Many-tooth Snake, Triangulate Collared Snake
  Simocephalus unicolor Boulenger, 1910 -- invalid
  Simophis rhinostoma (Schlegel, 1837) -- valid -- Sao Paulo False Coral Snake
  Sinonatrix Rossman and Eberle, 1977 -- valid
  Sinonatrix aequifasciata (Barbour, 1908) -- valid -- Asiatic Water Snake
  Sinonatrix annularis (Hallowell, 1857) -- valid -- Ringed Water Snake
  Sinonatrix percarinata (Boulenger, 1899) -- valid -- Eastern Water Snake, Olive Keelback
  Sinonatrix percarinata percarinata (Boulenger, 1899) -- valid
  Sinonatrix percarinata suriki (Maki, 1931) -- valid
  Sinonatrix yunnanensis Rao and Yang, 1998 -- valid -- Yunnan Water Snake
  Siphlophis cervinus (Laurenti, 1768) -- valid -- Panama Spotted Night Snake
  Siphlophis compressus (Daudin, 1803) -- valid -- Tropical Flat Snake
  Siphlophis leucocephalus (Günther, 1863) -- valid -- Common Spotted Night Snake
  Siphlophis longicaudatus (Andersson, 1901) -- valid -- Brazilian Spotted Night Snake
  Siphlophis pulcher (Raddi, 1820) -- valid -- Guanabara Spotted Night Snake
  Siphlophis worontzowi (Prado, 1940) -- valid -- Worontzow's Spotted Night Snake
  Sistrurus catenatus (Rafinesque-Schmaltz, 1818) -- valid -- Massasauga, Víbora-cascabel pigmea-norteña
  Sistrurus catenatus catenatus (Rafinesque-Schmaltz, 1818) -- invalid -- Eastern Massasauga
  Sistrurus catenatus tergeminus (Say in James, 1823) -- invalid -- Western Massasauga
  Sistrurus miliarius (Linnaeus, 1766) -- valid -- Pigmy Rattlesnake, Pygmy Rattlesnake
  Sistrurus miliarius barbouri Gloyd, 1935 -- valid -- Dusky Pigmy Rattlesnake
  Sistrurus miliarius miliarius (Linnaeus, 1766) -- valid -- Carolina Pigmy Rattlesnake
  Sistrurus miliarius streckeri Gloyd, 1935 -- valid -- Western Pigmy Rattlesnake
  Sonora aemula (Cope, 1879) -- valid -- Culebra-suelera cola plana, Filetail Ground Snake
  Sonora michoacanensis (Dugès, 1884) -- valid -- Culebra-suelera michoacana, Michoacán Ground Snake
  Sonora mutabilis Stickel, 1943 -- valid -- Michoacán Ground Snake
  Sonora semiannulata Baird and Girard, 1853 -- valid -- Culebra-suelera semianillada, Ground Snake, Groundsnake
  Sonora semiannulata semiannulata Baird and Girard, 1853 -- valid
  Sonora semiannulata taylori (Boulenger, 1894) -- valid
  Sordellina punctata (Peters, 1880) -- valid -- Dotted Brown Snake
  Spalerosophis arenarius (Boulenger, 1890) -- valid -- Red-spotted Diadem Snake, Red-spotted Royal Snake
  Spalerosophis atriceps (Fischer, 1885) -- valid -- Diadem Snake, Royal Snake
  Spalerosophis diadema (Schlegel, 1837) -- valid -- Diadem Snake, Royal Snake
  Spalerosophis diadema cliffordii (Schlegel, 1837) -- valid
  Spalerosophis diadema diadema (Schlegel, 1837) -- valid
  Spalerosophis diadema schirasianus (Jan, 1863) -- valid
  Spalerosophis dolichospilus (Werner, 1923) -- valid -- Werner's Diadem Snake
  Spalerosophis josephscorteccii Lanza, 1964 -- valid -- Scortecci's Diadem Snake
  Spalerosophis microlepis Jan, 1865 -- valid -- Jan's Diadem Snake, Zebra Snake
  Spilotes pullatus (Linnaeus, 1758) -- valid -- Chicken Snake, Culebra-ratonera mica, Tiger Snake, Tropical Rat Snake, Yellow Rat Snake
  Spilotes pullatus anomalepis Bocourt, 1888 -- invalid
  Spilotes pullatus argusiformis Amaral, 1929 -- invalid
  Spilotes pullatus maculatus Amaral, 1929 -- invalid
  Spilotes pullatus mexicanus (Laurenti, 1768) -- invalid
  Spilotes pullatus pullatus (Linnaeus, 1758) -- invalid -- Tiger Snake, Tropical Rat Snake
  Spilotes sulphureus (Wagler, 1824) -- valid -- Amazon Puffing Snake
  Spilotes sulphureus dieperinkii (Schlegel, 1837) -- valid
  Spilotes sulphureus sulphureus (Wagler, 1824) -- valid
  Stegonotus batjanensis (Günther, 1865) -- valid -- Batjan Frog-eating Snake
  Stegonotus borneensis Inger, 1967 -- valid -- Borneo Frog-eating Snake
  Stegonotus cucullatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Slatey-grey Snake
  Stegonotus diehli Lindholm, 1905 -- valid -- Diehl's Little Ground Snake
  Stegonotus florensis (de Rooij, 1917) -- valid -- Flores Ground Snake
  Stegonotus guentheri Boulenger, 1895 -- valid -- Milne Bay Ground Snake
  Stegonotus heterurus Boulenger, 1893 -- valid -- Bismarck Ground Snake
  Stegonotus modestus (Schlegel, 1837) -- valid -- Northern New Guinea Ground Snake
  Stegonotus muelleri A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Stegonotus parvus (Meyer, 1874) -- valid -- Common Ground Snake, Slatey-grey Snake
  Stenorrhina degenhardtii (Berthold, 1846) -- valid -- Degenhardt's Scorpion-eating Snake
  Stenorrhina degenhardtii degenhardtii (Berthold, 1846) -- valid
  Stenorrhina degenhardtii mexicana (Steindachner, 1867) -- valid
  Stenorrhina degenhardtii ocellata Jan, 1876 -- valid
  Stenorrhina freminvillei A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Blood Snake, Culebra-alacranera de sangre, Slaty Grey Snake
  Stoliczkia borneensis Boulenger, 1899 -- valid -- Borneo Red Snake
  Stoliczkia khasiensis Jerdon, 1870 -- valid -- Khase Red Snake, Khasi Earth Snake
  Storeria Baird and Girard, 1853 -- valid -- Brown-bellied Snakes, North American Brownsnakes, Red-bellied Snakes
  Storeria dekayi (Holbrook, 1839) -- valid -- Brown Snake, couleuvre brune, Culebra-parda de Kay, Dekay's Brown Snake, Dekay's Brownsnake
  Storeria hidalgoensis Taylor, 1942 -- valid -- Culebra-parda hidalguense, Mexican Yellowbelly Brown Snake
  Storeria occipitomaculata (Storer, 1839) -- valid -- couleuvre à ventre rouge, Red-bellied Snake, Redbelly Snake
  Storeria occipitomaculata obscura Trapido, 1944 -- valid -- Florida Redbelly Snake
  Storeria occipitomaculata occipitomaculata (Storer, 1839) -- valid -- Northern Redbelly Snake
  Storeria occipitomaculata pahasapae H. M. Smith, 1963 -- valid -- Black Hills Redbelly Snake
  Storeria storerioides (Cope, 1865) -- valid -- Culebra-parda mexicana, Mexican Brown Snake
  Storeria victa Hay, 1892 -- valid -- Florida Brown Snake, Florida Brownsnake
  Styporhynchus celebicus W. C. H. Peters and Doria, 1878 -- invalid
  Styporhynchus truncatus Peters, 1863 -- invalid
  Symphimus leucostomus Cope, 1870 -- valid -- Culebra-labios blancos de Tehuantepec, Mexican White-lipped Snake
  Symphimus mayae (Gaige, 1936) -- valid -- Culebra-labios blancos maya, Yucatán White-lipped Snake
  Sympholis lippiens Cope, 1862 -- valid -- Culebra cola corta-mexicana, Mexican Short-tail Snake
  Synophis bicolor Peracca, 1896 -- valid -- Bicolored Shadow Snake
  Synophis calamitus Hillis, 1990 -- valid -- Calamitous Shadow Snake
  Synophis lasallei (Nicéforo-María, 1950) -- valid -- La Salle's Shadow Snake
  Synophis plectovertebralis Sheil and Grant, 2001 -- valid -- Braided Shadow Snake
  Tachymenis affinis Boulenger, 1896 -- valid -- Boulenger's Slender Snake
  Tachymenis attenuata Walker, 1945 -- valid -- Walker's Slender Snake
  Tachymenis attenuata attenuata Walker, 1945 -- valid
  Tachymenis attenuata boliviana Walker, 1945 -- valid
  Tachymenis chilensis (Schlegel, 1837) -- valid -- Chilean Slender Snake
  Tachymenis chilensis chilensis (Schlegel, 1837) -- valid
  Tachymenis chilensis coronellina Werner, 1898 -- valid
  Tachymenis elongata Despax, 1910 -- valid -- Depax's Slender Snake
  Tachymenis peruviana Wiegmann, 1835 -- valid -- Peru Slender Snake
  Tachymenis surinamensis Dunn, 1922 -- invalid
  Tachymenis tarmensis Walker, 1945 -- valid -- Slender Snake
  Taeniophallus affinis (Günther, 1858) -- valid
  Taeniophallus bilineatus (Fischer, 1885) -- valid
  Taeniophallus brevirostris (Peters, 1863) -- valid -- Short-nosed Groundsnake
  Taeniophallus nebularis Schargel, Rivas and Myers, 2005 -- valid
  Taeniophallus nicagus (Cope, 1868) -- valid
  Taeniophallus occipitalis (Jan, 1863) -- valid
  Taeniophallus persimilis (Cope, 1868) -- valid
  Taeniophallus poecilopogon (Cope, 1863) -- valid
  Taeniophallus quadriocellatus Santos, Di-Bernardo and Di Lema, 2008 -- valid
  Tantalophis discolor (Günther, 1860) -- valid -- Culebra-ojo de gato-falsa oaxaqueña, Oaxacan Cat-eyed Snake
  Tantilla albiceps Barbour, 1925 -- valid -- Barbour's Centipede Snake
  Tantilla alticola (Boulenger, 1903) -- valid -- Boulenger's Centipede Snake
  Tantilla andinista Wilson and Mena, 1980 -- valid -- Andes Centipede Snake
  Tantilla armillata Cope, 1876 -- valid
  Tantilla atriceps (Günther, 1895) -- valid -- Culebra-encapuchada mexicana, Mexican Black-headed Snake, Mexican Blackhead Snake
  Tantilla bairdi Stuart, 1941 -- valid -- Baird's Black-headed Snake
  Tantilla bocourti (Günther, 1895) -- valid -- Bocourt's Black-headed Snake, Culebra-encapuchada de Bocourt
  Tantilla boipiranga Sawaya and Sazima, 2003 -- valid
  Tantilla brevicauda Mertens, 1952 -- valid -- Mertens' Centipede Snake
  Tantilla briggsi Savitzky and H. M. Smith, 1971 -- valid -- Briggs' Centipede Snake, Culebra-ciempiés de Briggs
  Tantilla calamarina Cope, 1866 -- valid -- Culebra-ciempiés del Pacífico, Pacific Coast Centipede Snake
  Tantilla capistrata Cope, 1876 -- valid -- Capistrata Centipede Snake
  Tantilla cascadae Wilson and Meyer, 1981 -- valid -- Culebra-ciempiés michoacana, Michoacán Centipede Snake
  Tantilla ceboruca Canseco-Márquez, E. N. Smith, Ponce-Campos, Flores-Villela and Campbell, 2007 -- valid -- Ceboruco Centipede Snake
  Tantilla coronadoi Hartweg, 1944 -- valid -- Culebra-ciempiés guerrerense, Guerreran Centipede Snake
  Tantilla coronata Baird and Girard, 1853 -- valid -- Southeastern Crowned Snake
  Tantilla cucullata Minton, 1956 -- valid -- Big Bend Black-headed Snake, Big Bend Blackhead Snake, Trans-Pecos Black-headed Snake
  Tantilla cuniculator H. M. Smith, 1939 -- valid -- Culebra-ciempiés del Petén
  Tantilla deppei (Bocourt, 1883) -- valid -- Culebra-ciempiés de Deppe, Deppe's Centipede Snake
  Tantilla flavilineata H. M. Smith and Burger, 1950 -- valid -- Culebra-ciempiés rayas amarillas, Yellow-lined Centipede Snake
  Tantilla fraseri (Günther, 1895) -- invalid
  Tantilla gracilis Baird and Girard, 1853 -- valid -- Culebra-ciempiés cabeza plana, Flat-headed Snake, Flathead Snake
  Tantilla hendersoni Stafford, 2004 -- valid -- Peten Centipede Snake
  Tantilla hobartsmithi Taylor, 1936 -- valid -- Culebra-encapuchada del Suroeste, Southwestern Black-headed Snake, Southwestern Blackhead Snake
  Tantilla impensa Campbell, 1998 -- valid -- Greater Centipede Snake
  Tantilla insulamontana Wilson and Mena, 1980 -- valid -- Mountain Centipede Snake
  Tantilla jani (Günther, 1895) -- valid -- Culebra-ciempiés de Jan, Jan's Centipede Snake
  Tantilla johnsoni Wilson, Vaughn and Dixon, 1999 -- valid -- Johnson's Centipede Snake
  Tantilla lempira Wilson and Mena, 1980 -- valid -- Mena's Centipede Snake
  Tantilla longifrontalis (Boulenger, 1896) -- invalid
  Tantilla marcovani De Lema, 2004 -- invalid
  Tantilla melanocephala (Linnaeus, 1758) -- valid -- Black-headed Snake
  Tantilla miyatai Wilson and Knight, 1987 -- valid
  Tantilla moesta (Günther, 1863) -- valid -- Blackbelly Centipede Snake, Culebra-ciempiés vientre negro
  Tantilla nigra (Boulenger, 1914) -- valid -- Black Centipede Snake
  Tantilla nigriceps Kennicott, 1860 -- valid -- Culebra-encapuchada de pradera, Plains Black-headed Snake, Plains Blackhead Snake
  Tantilla oaxacae Wilson and Meyer, 1971 -- valid -- Culebra-ciempiés oaxaqueña, Oaxacan Centipede Snake
  Tantilla olympia Townsend, Wilson, Medina-Flores and Herrera-B, 2013 -- valid
  Tantilla oolitica Telford, 1966 -- valid -- Rim Rock Crowned Snake
  Tantilla petersi Wilson, 1979 -- valid -- Peters' Black-headed Snake
  Tantilla planiceps (Blainville, 1835) -- valid -- California Black-headed Snake, Culebra-encapuchada californiana, Western Black-headed Snake, Western Blackhead Snake
  Tantilla psittaca McCranie, 2011 -- valid
  Tantilla relicta Telford, 1966 -- valid -- Florida Crowned Snake
  Tantilla relicta neilli Telford, 1966 -- valid -- Central Florida Crowned Snake
  Tantilla relicta pamlica Telford, 1966 -- valid -- Coastal Dunes Crown Snake
  Tantilla relicta relicta Telford, 1966 -- valid -- Peninsula Crown Snake
  Tantilla reticulata Cope, 1860 -- valid -- Litter Snake, Reticulate Centipede Snake
  Tantilla robusta Canseco-Márquez, Mendelsohn and Gutiérrez-Mayén, 2002 -- valid -- Pueblan Centipede Snake
  Tantilla rubra Cope, 1875 -- valid -- Culebra-encapuchada roja, Red Black-headed Snake, Reddish Black-headed Snake
  Tantilla ruficeps (Cope, 1894) -- valid
  Tantilla schistosa (Bocourt, 1883) -- valid -- Culebra-ciempiés de tierra colorada, Red Earth Centipede Snake
  Tantilla semicincta (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Ringed Centipede Snake
  Tantilla sertula Wilson and Campbell, 2000 -- valid -- Garland Centipede Snake
  Tantilla shawi Taylor, 1949 -- valid -- Culebra-ciempiés de Potosí, Potosí Centipede Snake
  Tantilla slavensi Pérez-Higareda, H. M. Smith and R. B. Smith, 1985 -- valid -- Culebra-ciempiés de Slavens, Slavens' Centipede Snake
  Tantilla striata Dunn, 1928 -- valid -- Culebra-ciempiés rayada, Striped Centipede Snake
  Tantilla supracincta (Peters, 1863) -- valid -- Banded Centipede Snake
  Tantilla taeniata (Bocourt, 1883) -- valid -- Central American Centipede Snake, Culebra-ciempiés centroamericana
  Tantilla tayrae Wilson, 1983 -- valid -- Culebra-ciempiés del Tacaná, Volcan Tacaná Centipede Snake
  Tantilla tecta Campbell and E. N. Smith, 1997 -- valid -- White-striped Centipede Snake
  Tantilla trilineata (Peters, 1880) -- valid -- Three-lined Centipede Snake
  Tantilla triseriata H. M. Smith and P. W. Smith, 1951 -- valid -- Three-lined Centipede Snake
  Tantilla tritaeniata H. M. Smith and Williams, 1966 -- valid -- Three-banded Centipede Snake
  Tantilla vermiformis (Hallowell, 1861) -- valid -- Hallowell's Centipede Snake
  Tantilla vulcani Campbell, 1998 -- valid -- Vulcan Centipede Snake
  Tantilla wilcoxi Stejneger, 1902 -- valid -- Chihuahuan Black-headed Snake, Chihuahuan Blackhead Snake, Culebra-encapuchada chihuahuense
  Tantilla yaquia H. M. Smith, 1942 -- valid -- Culebra-encapuchada yaqui, Yaqui Black-headed Snake, Yaquia Blackhead Snake
  Tantillita brevissima (Taylor, 1937) -- valid -- Culebra-cola corta jaspeada, Speckled Dwarf Short-tail Snake
  Tantillita canula (Cope, 1876) -- valid -- Culebra-ciempiés imitacoral, Yucatecan Dwarf Short-tail Snake
  Tantillita lintoni (H. M. Smith, 1940) -- valid -- Culebra-cola corta de Linton, Linton's Dwarf Short-tail Snake
  Tantillita lintoni lintoni (H. M. Smith, 1940) -- valid
  Tantillita lintoni rozellae Perez-Higareda, 1985 -- valid
  Telescopus beetzi (Barbour, 1922) -- valid -- Karoo Tiger Snake, Namib Tiger Snake
  Telescopus dhara (Forskal, 1775) -- valid -- Arabian Cat Snake, Israeli Cat Snake, Large-eyed Cat Snake
  Telescopus dhara dhara (Forskal, 1775) -- valid
  Telescopus dhara somalicus (Parker, 1949) -- valid
  Telescopus fallax (Fleischmann, 1831) -- valid -- European Cat Snake, Mediterranean Cat Snake
  Telescopus fallax cyprianus (Barbour and Amaral, 1927) -- valid
  Telescopus fallax fallax (Fleischmann, 1831) -- valid
  Telescopus fallax iberus (Eichwald, 1831) -- valid
  Telescopus fallax intermedius Gruber, 1974 -- valid
  Telescopus fallax multisquamatus Wettstein, 1952 -- valid
  Telescopus fallax pallidus Stepanek, 1944 -- valid
  Telescopus fallax syriacus (Boettger, 1880) -- valid
  Telescopus finkeldeyi Haacke, 2013 -- valid -- Damara Tiger Snake
  Telescopus gezirae Broadley, 1994 -- valid -- Blue Nile Cat Snake
  Telescopus hoogstraali Schmidt and Marx, 1956 -- valid
  Telescopus nigriceps (Ahl, 1924) -- valid -- Black-headed Snake
  Telescopus obtusus (Reuss, 1834) -- valid -- Egyptian Cat Snake, Egyptian Catsnake
  Telescopus pulcher (Scortecci, 1935) -- valid -- Beautiful Cat Snake
  Telescopus rhinopoma (Blanford, 1874) -- valid -- Indian Desert Tiger Snake
  Telescopus semiannulatus A. Smith, 1849 -- valid -- Common Tiger Snake, Tiger Cat Snake, Western Tiger Snake
  Telescopus semiannulatus polystictus Mertens, 1954 -- valid -- Damara Tiger Snake
  Telescopus semiannulatus semiannulatus A. Smith, 1849 -- valid
  Telescopus tessellatus (Wall, 1908) -- valid -- Soosan Tiger Snake
  Telescopus tripolitanus (Werner, 1909) -- valid
  Telescopus variegatus (Reinhardt, 1843) -- valid -- Variable Cat Snake
  Tetralepis Boettger, 1892 -- valid
  Tetralepis fruhstorferi Boettger, 1892 -- valid -- Bluebelly Java Snake
  Thalesius viridis (Werner, 1924) -- invalid
  Thamnodynastes almae Franco and Ferreira, 2003 -- valid
  Thamnodynastes ceibae Bailey and Thomas, 2007 -- valid
  Thamnodynastes chaquensis Bergna and Alvarez, 1993 -- valid
  Thamnodynastes chimanta Roze, 1958 -- valid -- Roze's Coastal House Snake
  Thamnodynastes corocoroensis Gorzula and Ayarzagüena, 1996 -- valid
  Thamnodynastes dixoni Bailey and Thomas, 2007 -- valid
  Thamnodynastes duida Myers and Donnelly, 1996 -- valid
  Thamnodynastes gambotensis Pérez-Santos and Moreno, 1989 -- valid
  Thamnodynastes hypoconia (Cope, 1860) -- valid
  Thamnodynastes lanei Bailey, Thomas and da Silva, 2005 -- valid
  Thamnodynastes longicaudus Franco, Ferreira, Marques and Sazima, 2003 -- valid
  Thamnodynastes marahuaquensis Gorzula and Ayarzagüena, 1996 -- valid
  Thamnodynastes pallidus (Linnaeus, 1758) -- valid -- Amazon Coastal House Snake
  Thamnodynastes paraguanae Bailey and Thomas, 2007 -- valid
  Thamnodynastes ramonriveroi Manzanilla and Sánchez, 2005 -- valid
  Thamnodynastes rutilus (Prado, 1942) -- valid -- Prado's Coastal House Snake
  Thamnodynastes sertanejo Bailey, Thomas and da Silva, 2005 -- valid
  Thamnodynastes strigatus (Günther, 1858) -- valid -- Coastal House Snake
  Thamnodynastes yavi Myers and Donnelly, 1996 -- valid
  Thamnophis Fitzinger, 1843 -- valid -- Garter Snakes, Ribbon Snakes
  Thamnophis atratus (Kennicott in Cooper, 1860) -- valid -- Aquatic Garter Snake, Pacific Coast Aquatic Garter Snake, Santa Cruz Garter Snake, Western Aquatic Garter Snake
  Thamnophis atratus aquaticus Fox, 1951 -- invalid
  Thamnophis atratus atratus (Kennicott in Cooper, 1860) -- valid
  Thamnophis atratus hydrophilus Fitch, 1936 -- valid -- Oregon Garter Snake
  Thamnophis atratus zaxanthus Boundy, 1999 -- valid -- Diablo Range Gartersnake
  Thamnophis bogerti Rossman and Burbrink, 2005 -- valid
  Thamnophis bovalli Dunn, 1940 -- invalid
  Thamnophis brachystoma (Cope, 1892) -- valid -- Short-headed Garter Snake, Shorthead Garter Snake
  Thamnophis butleri (Cope, 1889) -- valid -- Butler's Garter Snake
  Thamnophis chrysocephalus (Cope, 1885) -- valid -- Culebra-listonada cabeza dorada, Goldenhead Garter Snake
  Thamnophis conanti Rossman and Burbrink, 2005 -- valid
  Thamnophis couchii (Kennicott in Baird, 1859) -- valid -- Couch's Garter Snake, Sierra Garter Snake, Western Aquatic Garter Snake
  Thamnophis cyrtopsis (Kennicott, 1860) -- valid -- Black-necked Garter Snake, Blackneck Garter Snake, Culebra-listonada cuello negro
  Thamnophis cyrtopsis collaris (Jan, 1863) -- valid
  Thamnophis cyrtopsis cyrtopsis (Kennicott, 1860) -- valid -- Western Black-headed Snake
  Thamnophis cyrtopsis ocellatus (Cope, 1880) -- valid -- Black-headed Garter Snake
  Thamnophis cyrtopsis postremus H. M. Smith, 1942 -- invalid
  Thamnophis elegans (Baird and Girard, 1853) -- valid -- Culebra-listonada elegante, Western Terrestrial Garter Snake
  Thamnophis elegans arizonae Tanner and Lowe, 1989 -- invalid -- Arizona Garter Snake
  Thamnophis elegans elegans (Baird and Girard, 1853) -- valid -- Mountain Garter Snake
  Thamnophis elegans hueyi Van Denburgh and Slevin, 1923 -- valid
  Thamnophis elegans nigrescens Johnson, 1947 -- invalid
  Thamnophis elegans terrestris Fox, 1951 -- valid -- Coast Garter Snake
  Thamnophis elegans vagrans (Baird and Girard, 1853) -- valid -- Wandering Garter Snake
  Thamnophis elegans vascotanneri Tanner and Lowe, 1989 -- invalid -- Upper Basin Garter Snake
  Thamnophis eques (Reuss, 1834) -- valid -- Culebra-listonada del sur-mexicano, Mexican Garter Snake
  Thamnophis eques carmenensis Conant, 2003 -- valid
  Thamnophis eques cuitzeoensis Conant, 2003 -- valid
  Thamnophis eques diluvialis Conant, 2003 -- valid
  Thamnophis eques eques (Reuss, 1834) -- valid -- Mexican Garter Snake
  Thamnophis eques insperatus Conant, 2003 -- valid
  Thamnophis eques megalops (Kennicott, 1860) -- valid -- Northern Mexican Garter Snake, northern Mexican gartersnake
  Thamnophis eques obscurus Conant, 2003 -- valid
  Thamnophis eques patzcuaroensis Conant, 2003 -- valid
  Thamnophis eques scotti Conant, 2003 -- valid
  Thamnophis eques virgatenuis Conant, 1963 -- valid
  Thamnophis errans H. M. Smith, 1942 -- valid -- Culebra-listonada errante, Mexican Wandering Garter Snake
  Thamnophis exsul Rossman, 1969 -- valid -- Culebra-listonada de montaña, Montane Garter Snake
  Thamnophis fulvus (Bocourt, 1893) -- valid -- Culebra-listonada amarillenta, Highland Garter Snake
  Thamnophis gigas Fitch, 1940 -- valid -- Giant Garter Snake
  Thamnophis godmani (Günther, 1894) -- valid -- Culebra-listonada de Godman, Godman's Garter Snake
  Thamnophis hammondii (Kennicott, 1860) -- valid -- Two-striped Garter Snake
  Thamnophis lineri Rossman and Burbrink, 2005 -- valid
  Thamnophis marcianus (Baird and Girard, 1853) -- valid -- Checkered Garter Snake, Culebra-listonada manchada
  Thamnophis marcianus marcianus (Baird and Girard, 1853) -- valid -- Checkered Garter Snake
  Thamnophis marcianus praeocularis (Bocourt, 1892) -- valid
  Thamnophis melanogaster (Peters, 1864) -- valid -- Blackbelly Garter Snake, Culebra-de agua vientre negro
  Thamnophis melanogaster canescens H. M. Smith, 1942 -- valid
  Thamnophis melanogaster chihuahuaensis Tanner, 1959 -- valid
  Thamnophis melanogaster linearis H. M. Smith, Nixon and P. W. Smith, 1950 -- valid
  Thamnophis melanogaster melanogaster (Peters, 1864) -- valid
  Thamnophis mendax Walker, 1955 -- valid -- Culebra-listonada tamaulipeca, Tamaulipan Montane Garter Snake
  Thamnophis nigronuchalis Thompson, 1957 -- valid -- Southern Durango Spotted Garter Snake
  Thamnophis ordinoides (Baird and Girard, 1852) -- valid -- Northwestern Garter Snake, Puget Sound Garter Snake
  Thamnophis ordinoides hydrophila Fitch, 1936 -- invalid
  Thamnophis postremus H. M. Smith, 1942 -- valid
  Thamnophis proximus (Say in James, 1823) -- valid -- Culebra-listonada occidental, Western Ribbon Snake
  Thamnophis proximus alpinus Rossman, 1963 -- valid
  Thamnophis proximus diabolicus Rossman, 1963 -- valid -- Arid Land Ribbon Snake
  Thamnophis proximus orarius Rossman, 1963 -- valid -- Gulf Coast Ribbon Snake
  Thamnophis proximus proximus (Say in James, 1823) -- valid -- Western Ribbon Snake
  Thamnophis proximus rubrilineatus Rossman, 1963 -- valid -- Redstripe Ribbon Snake
  Thamnophis proximus rutiloris (Cope, 1885) -- valid
  Thamnophis pulchrilatus (Cope, 1885) -- valid -- Culebra-listonada de tierras altas-mexicana, Yellow-throated Garter Snake
  Thamnophis radix (Baird and Girard, 1853) -- valid -- Plains Garter Snake, Plains Gartersnake
  Thamnophis rossmani Conant, 2000 -- valid -- Rossman's Garter Snake
  Thamnophis rufipunctatus (Cope, 1875) -- valid -- Culebra-de agua cabeza angosta, Narrow-headed Garter Snake, Narrowhead Garter Snake, Narrowhead Watersnake
  Thamnophis rufipunctatus unilabialis Tanner, 1985 -- invalid
  Thamnophis saurita (Linnaeus, 1766) -- valid
  Thamnophis saurita nitae Rossman, 1963 -- valid -- Bluestripe Ribbon Snake
  Thamnophis saurita sackenii (Kennicott, 1859) -- valid -- Peninsula Ribbon Snake
  Thamnophis saurita saurita (Linnaeus, 1766) -- valid -- Eastern Ribbon Snake
  Thamnophis saurita sepentrionalis Rossman, 1963 -- valid -- Northern Ribbon Snake
  Thamnophis scalaris Cope, 1861 -- valid -- Culebra-listonada de montaña-cola larga, Longtail Alpine Garter Snake
  Thamnophis scaliger (Jan, 1863) -- valid -- Culebra-listonada de montaña-cola corta, Short-tail Alpine Garter Snake
  Thamnophis sirtalis (Linnaeus, 1758) -- valid -- Common Garter Snake, couleuvre rayée, Culebra-listonada común
  Thamnophis sirtalis annectens Brown, 1950 -- valid -- Texas Garter Snake
  Thamnophis sirtalis concinnus (Hallowell, 1852) -- valid -- Red-spotted Garter Snake, Red-spotted Gartersnake
  Thamnophis sirtalis dorsalis (Baird and Girard, 1853) -- valid -- New Mexico Garter Snake
  Thamnophis sirtalis fitchi Fox, 1951 -- valid -- Valley Garter Snake
  Thamnophis sirtalis infernalis (Blainville, 1835) -- valid -- California Red-sided Garter Snake, California Red-sided Gartersnake
  Thamnophis sirtalis lowei Tanner, 1988 -- valid
  Thamnophis sirtalis pallidulus Allen, 1899 -- valid -- Maritime Garter Snake
  Thamnophis sirtalis parietalis (Say in James, 1823) -- valid -- Red-sided Garter Snake
  Thamnophis sirtalis pickeringii (Baird and Girard, 1853) -- valid -- Puget Sound Garter Snake
  Thamnophis sirtalis semifasciatus (Cope, 1892) -- valid -- Chicago Garter Snake
  Thamnophis sirtalis similis Rossman, 1965 -- valid -- Blue-striped Garter Snake, Bluestripe Garter Snake
  Thamnophis sirtalis sirtalis (Linnaeus, 1758) -- valid -- Eastern Garter Snake
  Thamnophis sirtalis tetrataenia (Cope in Yarrow, 1875) -- valid -- San Francisco Garter Snake
  Thamnophis sumichrasti (Cope, 1867) -- valid -- Culebra-listonada de Sumichrast, Sumichrast's Garter Snake
  Thamnophis unilabialis Tanner, 1985 -- valid -- Madrean Narrowheaded Garter Snake
  Thamnophis validus (Kennicott, 1860) -- valid -- West Coast Garter Snake
  Thamnophis validus celaeno (Cope, 1861) -- valid
  Thamnophis validus isabellae (Conant, 1953) -- valid
  Thamnophis validus thamnophisoides (Conant, 1961) -- valid
  Thamnophis validus validus (Kennicott, 1860) -- valid
  Thamnosophis epistibes (Cadle, 1996) -- valid
  Thamnosophis infrasignatus (Günther, 1882) -- valid
  Thamnosophis lateralis (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Lateral Water Snake
  Thamnosophis martae (Glaw, Franzen and Vences, 2005) -- valid
  Thamnosophis mavotenda Glaw, Nagy, Köhler, Franzen and Vences, 2009 -- valid
  Thamnosophis stumpffi (Boettger, 1881) -- valid -- Yellow-striped Water Snake
  Thelotornis capensis A. Smith, 1849 -- valid -- Savanna Vine Snake, Twig Snake
  Thelotornis capensis capensis A. Smith, 1849 -- valid
  Thelotornis capensis oatesi (Günther, 1881) -- valid -- Oates' Vine Snake
  Thelotornis capensis schilsi Derleyn, 1978 -- valid
  Thelotornis kirtlandii (Hallowell, 1844) -- valid -- Bird Snake, Forest Vine Snake, Twig Snake
  Thelotornis mossambicanus (Bocage, 1895) -- valid -- Eastern Twig Snake, Eastern Vine Snake, Vine Snake
  Thelotornis usambaricus Broadley, 2001 -- valid -- Usambara Vine Snake
  Thermophis baileyi (Wall, 1907) -- valid -- Xizang Hot-spring Keel-back
  Thermophis zhaoermii Guo, Liu, Feng and He, 2008 -- valid -- Sichuan Hot-spring Keel-back
  Thrasops flavigularis (Hallowell, 1852) -- valid -- Yellow-throated Bold-eyed Tree Snake
  Thrasops jacksonii Günther, 1895 -- valid -- Black Tree Snake
  Thrasops occidentalis Parker, 1940 -- valid -- Black Tree Snake, Western Black Tree Snake, Western Tree Snake
  Thrasops schmidti Loveridge, 1936 -- valid -- Schmidt's Bold-eyed Tree Snake
  Tomodon dorsatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Pampas Snake
  Tomodon ocellatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Ocellated Pampas Snake
  Tomodon orestes Harvey and Muñoz, 2004 -- valid
  Toxicodryas blandingii (Hallowell, 1844) -- valid -- Blandings Tree Snake
  Toxicodryas pulverulenta (Fischer, 1856) -- valid -- Fischer's Cat Snake
  Trachischium Günther, 1853 -- valid
  Trachischium fuscum (Blyth, 1854) -- valid -- Blackbelly Worm-eating Snake
  Trachischium guentheri Boulenger, 1890 -- valid -- Rosebelly Worm-eating Snake
  Trachischium laeve Peracca, 1904 -- valid -- Olive Oriental Slender Snake
  Trachischium monticola (Cantor, 1839) -- valid -- Mountain Worm-eating Snake
  Trachischium tenuiceps (Blyth, 1854) -- valid -- Yellowbelly Worm-eating Snake
  Trachyboa boulengeri Peracca, 1910 -- valid -- Northern Eyelash Boa
  Trachyboa gularis Peters, 1860 -- valid -- Southern Eyelash Boa
  Tretanorhinus mocquardi Bocourt, 1891 -- valid -- Mocquard's Swamp Snake
  Tretanorhinus nigroluteus Cope, 1861 -- valid -- Culebra-buceadora vientre naranja, Orangebelly Swamp Snake
  Tretanorhinus nigroluteus dichromaticus Villa, 1969 -- valid
  Tretanorhinus nigroluteus lateralis Bocourt, 1891 -- valid
  Tretanorhinus nigroluteus nigroluteus Cope, 1861 -- valid
  Tretanorhinus nigroluteus obscurus Villa, 1969 -- valid
  Tretanorhinus taeniatus Boulenger, 1903 -- valid -- Striped Swamp Snake
  Tretanorhinus variabilis A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Caribbean Water Snake
  Tretanorhinus variabilis binghami Schwartz and Ogren, 1956 -- valid
  Tretanorhinus variabilis insulaepinorum Barbour, 1916 -- valid
  Tretanorhinus variabilis lewisi Grant, 1941 -- valid
  Tretanorhinus variabilis variabilis A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Tretanorhinus variabilis wagleri (Jan, 1863) -- valid
  Trimeresurus albolabris Gray, 1842 -- valid -- White-lipped Pitviper, White-lipped Tree Viper
  Trimeresurus andalasensis David, Vogel, Vijayakumar and Vidal, 2006 -- valid
  Trimeresurus barati Regenass and Kramer, 1981 -- valid -- Barat Bamboo Pitviper
  Trimeresurus borneensis (Peters, 1872) -- valid -- Borneo Pit Viper
  Trimeresurus brongersmai Hoge, 1969 -- valid -- Brongersma's Pit Viper
  Trimeresurus buniana (L. L. Grismer, J. L. Grismer and McGuire, 2006) -- valid -- Fairy Pitviper
  Trimeresurus cantori (Blyth, 1846) -- valid -- Cantor's Pit Viper
  Trimeresurus erythrurus (Cantor, 1839) -- valid -- Bamboo Pitviper, Redtail Pitviper
  Trimeresurus fasciatus (Boulenger, 1896) -- valid -- Banded Pit Viper
  Trimeresurus flavomaculatus (Gray, 1842) -- valid -- Philippine Pitviper
  Trimeresurus fucatus Vogel, David and Pauwels, 2004 -- valid -- Siamese Peninsula Pitviper
  Trimeresurus gracilis Oshima, 1920 -- valid -- Kikuchi Habu
  Trimeresurus gramineus (Shaw, 1802) -- valid -- Common Bamboo Viper
  Trimeresurus gumprechti David, Vogel, Pauwels and Vidal, 2002 -- valid -- Gumprecht's Green Pitviper
  Trimeresurus hageni (Van Lidth de Jeude, 1886) -- valid -- Hagen's Pitviper, Indonesian Pit Viper
  Trimeresurus honsonensis (L. L. Grismer, Ngo and J. L. Grismer, 2008) -- valid
  Trimeresurus insularis Kramer, 1977 -- valid -- White-lipped Island Pitviper
  Trimeresurus kanburiensis M. A. Smith, 1943 -- valid -- Kanburi Pit Viper
  Trimeresurus labialis Steindachner, 1867 -- valid -- Island Pit Viper, Nicobar Bamboo Pitviper
  Trimeresurus macrolepis Beddome, 1862 -- valid
  Trimeresurus macrops Kramer, 1977 -- valid -- Kramer's Pit Viper, Large-eyed Pitviper
  Trimeresurus malabaricus (Jerdon, 1854) -- valid -- Malabarian Pit Viper
  Trimeresurus malcolmi Loveridge, 1938 -- valid -- Malcolm's Pitviper
  Trimeresurus mcgregori Taylor, 1919 -- valid -- McGregor's Pitviper, McGregor's Tree Viper
  Trimeresurus medoensis Zhao, 1977 -- valid -- Green Bamboo Leaf Pit Viper, Motuo Bamboo Pitviper
  Trimeresurus nebularis Vogel, David and Pauwels, 2004 -- valid -- Cameron Highlands Pitviper, Clouded Pitviper
  Trimeresurus phuketensis Sumontha, Kunya, Pauwels, Nitikul and Punnadee, 2011 -- valid -- Phuket Pitviper
  Trimeresurus puniceus (F. Boie, 1827) -- valid -- Ashy Pit Viper, Flat-nosed Pitviper
  Trimeresurus purpureomaculatus (Gray, 1832) -- valid -- Mangrove Viper, Shore Pit Viper
  Trimeresurus rubeus (Malhotra, Thorpe, Mrinalini and Stuart, 2011) -- valid -- Ruby-eyed Green Pitviper
  Trimeresurus sabahi Regenass and Kramer, 1981 -- valid -- Sabah Bamboo Pitviper
  Trimeresurus schultzei Griffin, 1909 -- valid -- Schultze's Pit Viper
  Trimeresurus septentrionalis Kramer, 1977 -- valid -- Nepal Pitviper
  Trimeresurus sichuanensis (Guo and Wang, 2011) -- valid
  Trimeresurus stejnegeri K. P. Schmidt, 1925 -- valid -- Chinese Green Tree Viper
  Trimeresurus stejnegeri chenbihuii Zhao, 1995 -- valid -- Chen's Bamboo Pitviper
  Trimeresurus stejnegeri stejnegeri K. P. Schmidt, 1925 -- valid -- Stejneger's Bamboo Pitviper
  Trimeresurus strigatus Gray, 1842 -- valid -- Horseshoe Pitviper
  Trimeresurus sumatranus (Raffles, 1822) -- valid -- Sumatra Pit Viper
  Trimeresurus tibetanus Huang, 1982 -- valid -- Tibetan Pit Viper
  Trimeresurus toba David, Petri, Vogel and Doria, 2009 -- valid -- Toba Pitviper
  Trimeresurus trigonocephalus (Latreille, 1801) -- valid -- Ceylon Pit Viper, Sri Lankan Green Pitviper
  Trimeresurus truongsonensis Orlov, Ryabov, Thanh and H. Cuc, 2004 -- valid -- Quang Binh Pitviper
  Trimeresurus venustus Vogel, 1991 -- valid -- Beautiful Pitviper, Brown-spotted Pit Viper
  Trimeresurus vogeli David, Vidal and Pauwels, 2001 -- valid -- Vogel's Pit Viper
  Trimeresurus wiroti Trutnau, 1981 -- valid -- Wirot's Pit Viper
  Trimeresurus yunnanensis K. P. Schmidt, 1925 -- valid -- Yunnan Bamboo Pitviper
  Trimerodytes balteatus Cope, 1895 -- invalid
  Trimetopon barbouri Dunn, 1930 -- valid -- Barbour's Tropical Ground Snake
  Trimetopon gracile (Günther, 1872) -- valid -- Günther's Tropical Ground Snake
  Trimetopon pliolepis Cope, 1894 -- valid -- Cope's Tropical Ground Snake
  Trimetopon simile Dunn, 1930 -- valid -- Dunn's Tropical Ground Snake
  Trimetopon slevini Dunn, 1940 -- valid -- Slevin's Tropical Ground Snake
  Trimetopon viquezi Dunn, 1937 -- valid -- Viquez's Tropical Ground Snake
  Trimorphodon biscutatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Costal Lyre Snake, Culebra-lira cabeza negra, Western Lyre Snake
  Trimorphodon lambda Cope, 1886 -- valid -- Sonoran Lyre Snake
  Trimorphodon lyrophanes (Cope, 1860) -- valid -- Baja California Lyre Snake
  Trimorphodon paucimaculatus Taylor, 1938 -- valid -- Sinaloan Lyresnake
  Trimorphodon quadruplex H. M. Smith, 1941 -- valid
  Trimorphodon tau Cope, 1870 -- valid -- Culebra-lira mexicana, Mexican Lyre Snake
  Trimorphodon tau latifascia (Peters, 1870) -- valid
  Trimorphodon tau tau Cope, 1870 -- valid
  Trimorphodon vilkinsonii Cope, 1886 -- valid -- Texas Lyre Snake
  Tropidoclonion Cope, 1860 -- valid -- Lined Snake, Lined Snakes
  Tropidoclonion lineatum (Hallowell, 1856) -- valid -- Lined Snake
  Tropidoclonion lineatum annectens Ramsey, 1953 -- valid
  Tropidoclonion lineatum lineatum (Hallowell, 1856) -- valid -- Northern Lined Snake
  Tropidoclonion lineatum mertensi Smith, 1965 -- valid -- Mertens' Lined Snake
  Tropidoclonion lineatum texanum Ramsey, 1953 -- valid -- Texas Lined Snake
  Tropidoclonium storerioides Cope, 1865 -- invalid
  Tropidodipsas annulifera Boulenger, 1894 -- valid -- Western Snail-eating Snake
  Tropidodipsas fasciata Günther, 1858 -- valid -- Banded Snail Sucker
  Tropidodipsas fasciata fasciata Günther, 1858 -- valid
  Tropidodipsas fasciata guerreroensis Taylor, 1939 -- valid -- Guerreran Snail Sucker
  Tropidodipsas fischeri Boulenger, 1894 -- valid -- Culebra-caracolera de Fisher, Fischer's Snail-eating Snake
  Tropidodipsas philippii (Jan, 1863) -- valid -- Philippi's Snail-eating Snake
  Tropidodipsas repleta G. R. Smith, Lemos-Espinal, Hartman and Chiszar, 2005 -- valid
  Tropidodipsas sartorii Cope, 1863 -- valid -- Culebra-caracolera terrestre, Terrestrial Snail Sucker
  Tropidodipsas sartorii macdougalli H. M. Smith, 1943 -- valid
  Tropidodipsas sartorii sartorii Cope, 1863 -- valid
  Tropidodipsas zweifeli Liner and Wilson, 1970 -- valid -- Culebra-caracolera de Zweifel, Zweifel's Snail-eating Snake
  Tropidodryas serra (Schlegel, 1837) -- valid -- Serra Snake
  Tropidodryas striaticeps (Cope, 1870) -- valid -- Jiboinha
  Tropidolaemus huttoni (M. A. Smith, 1949) -- valid -- Hutton's Pitviper
  Tropidolaemus laticinctus (Kuch, Gumprecht and Melaun, 2007) -- valid -- Broad-banded Temple Pitviper
  Tropidolaemus philippensis (Gray, 1842) -- valid -- South Philippine Temple Pitviper
  Tropidolaemus subannulatus (Gray, 1842) -- valid -- North Philippine Temple Pitviper
  Tropidolaemus wagleri (F. Boie, 1827) -- valid -- Temple Pitviper, Wagler's Palm Viper, Wagler's Pit Viper
  Tropidonophis Jan, 1863 -- valid
  Tropidonophis aenigmaticus Malnate and Underwood, 1988 -- valid -- East Papuan Keelback
  Tropidonophis dahlii (Werner, 1899) -- valid -- New Britain Keelback
  Tropidonophis dendrophiops (Günther, 1883) -- valid -- Spotted Water Snake
  Tropidonophis dolasii Kraus and Allison, 2004 -- valid
  Tropidonophis doriae (Boulenger, 1898) -- valid -- Barred Keelback
  Tropidonophis elongatus (Jan, 1865) -- valid -- Moluccan Keelback
  Tropidonophis halmahericus (Boettger, 1895) -- valid
  Tropidonophis hypomelas (Günther, 1877) -- valid -- Bismarck Keelback
  Tropidonophis mairii (Gray, 1841) -- valid -- Common Keelback, Mair's Keelback
  Tropidonophis mairii mairii (Gray, 1841) -- valid
  Tropidonophis mairii plumbea (Macleay, 1877) -- valid
  Tropidonophis mcdowelli Malnate and Underwood, 1988 -- valid -- Northern New Guinea Keelback
  Tropidonophis montanus (Lidth de Jeude, 1911) -- valid -- North Irian Montane Keelback
  Tropidonophis multiscutellatus (Brongersma, 1948) -- valid -- Many-scaled Keelback
  Tropidonophis negrosensis (Taylor, 1917) -- valid -- Negros Spotted Water Snake
  Tropidonophis novaeguineae (Lidth de Jeude, 1911) -- valid -- New Guinea Keelback
  Tropidonophis parkeri Malnate and Underwood, 1988 -- valid -- Highland Keelback
  Tropidonophis picturatus (Schlegel, 1837) -- valid -- Painted Keelback
  Tropidonophis punctiventris (Boettger, 1895) -- valid -- Halmahera Keelback
  Tropidonophis statisticus Malnate and Underwood, 1988 -- valid -- Papua New Guinea Montane Keelback
  Tropidonophis truncatus (Peters, 1863) -- valid
  Tropidonotus annularis Hallowell, 1857 -- invalid
  Tropidonotus anoscopus Cope, 1861 -- invalid
  Tropidonotus auriculatus Günther, 1858 -- invalid
  Tropidonotus beddomii Günther, 1864 -- invalid
  Tropidonotus bellulus Stoliczka, 1871 -- invalid
  Tropidonotus callistus Günther, 1873 -- invalid
  Tropidonotus celaeno Cope, 1861 -- invalid
  Tropidonotus chrysargoides Günther, 1858 -- invalid
  Tropidonotus chrysargos Schlegel, 1837 -- invalid
  Tropidonotus chrysargus ceylonensis Günther, 1858 -- invalid
  Tropidonotus collaris Jan, 1863 -- invalid
  Tropidonotus conspicillatus Günther, 1872 -- invalid
  Tropidonotus cyclopion A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- invalid
  Tropidonotus dahlii Werner, 1899 -- invalid
  Tropidonotus dendrophiops Günther, 1883 -- invalid
  Tropidonotus doriae Boulenger, 1898 -- invalid
  Tropidonotus flavifrons Boulenger, 1887 -- invalid
  Tropidonotus godmani Günther, 1894 -- invalid
  Tropidonotus halmahericus Boettger, 1895 -- invalid
  Tropidonotus himalayanus Günther, 1864 -- invalid
  Tropidonotus hypomelas Günther, 1877 -- invalid
  Tropidonotus inas Laidlaw, 1901 -- invalid
  Tropidonotus johannis Boulenger, 1908 -- invalid
  Tropidonotus khasiensis Boulenger, 1890 -- invalid
  Tropidonotus lineatus Peters, 1861 -- invalid
  Tropidonotus maculatus Edeling, 1864 -- invalid
  Tropidonotus mairii Gray, 1841 -- invalid
  Tropidonotus melanogaster Peters, 1864 -- invalid
  Tropidonotus modestus Günther, 1875 -- invalid
  Tropidonotus montanus Lidth de Jeude, 1911 -- invalid
  Tropidonotus montanus novaeguineae Lidth de Jeude, 1911 -- invalid
  Tropidonotus monticolus Jerdon, 1853 -- invalid
  Tropidonotus natrix astreptophorus Seoane, 1885 -- invalid
  Tropidonotus nicobariensis Sclater, 1891 -- invalid
  Tropidonotus nigrocinctus Blyth, 1856 -- invalid
  Tropidonotus nuchalis Boulenger, 1891 -- invalid
  Tropidonotus octolineatus Boulenger, 1904 -- invalid
  Tropidonotus ornaticeps Werner, 1924 -- invalid
  Tropidonotus parallelus Boulenger, 1890 -- invalid
  Tropidonotus pealii Sclater, 1891 -- invalid
  Tropidonotus petersii Boulenger, 1893 -- invalid
  Tropidonotus picturatus Schlegel, 1837 -- invalid
  Tropidonotus picturatus elongatus Jan, 1865 -- invalid
  Tropidonotus platyceps Blyth, 1854 -- invalid
  Tropidonotus plumbicolor Cantor, 1839 -- invalid
  Tropidonotus pryeri Boulenger, 1887 -- invalid
  Tropidonotus punctiventris Boettger, 1895 -- invalid
  Tropidonotus punctulatus Günther, 1858 -- invalid
  Tropidonotus rhodomelas H. Boie in F. Boie, 1827 -- invalid
  Tropidonotus sanctijohannis Boulenger, 1890 -- invalid
  Tropidonotus sarasinorum Boulenger, 1896 -- invalid
  Tropidonotus sarawacensis Günther, 1872 -- invalid
  Tropidonotus sauteri Boulenger, 1909 -- invalid
  Tropidonotus scaliger Jan, 1863 -- invalid
  Tropidonotus spilogaster F. Boie, 1827 -- invalid
  Tropidonotus subminiatus Schlegel, 1837 -- invalid
  Tropidonotus swinhonis Günther, 1868 -- invalid
  Tropidonotus tigrinus F. Boie, 1826 -- invalid
  Tropidonotus trianguligerus F. Boie, 1827 -- invalid
  Tropidonotus trivittatus Hallowell, 1853 -- invalid
  Tropidonotus tytleri Blyth, 1863 -- invalid
  Tropidonotus venningi Wall, 1910 -- invalid
  Tropidonotus vibakari H. Boie, 1826 -- invalid
  Tropidonotus xenura Wall, 1907 -- invalid
  Tropidophiidae Brongersma, 1951 -- valid -- Dwarf Boas
  Tropidophis battersbyi Laurent, 1949 -- valid -- Battersby's Dwarf Boa
  Tropidophis canus (Cope, 1868) -- valid -- Bahama-Wood Snake
  Tropidophis caymanensis Battersby, 1938 -- valid -- Cayman Islands Dwarf Boa
  Tropidophis caymanensis caymanensis Battersby, 1938 -- invalid
  Tropidophis caymanensis parkeri Grant, 1940 -- invalid
  Tropidophis caymanensis schwartzi Thomas, 1963 -- invalid
  Tropidophis celiae Hedges, Estrada and Díaz, 1999 -- valid -- Canasi Trope
  Tropidophis feicki Schwartz, 1957 -- valid -- Feick's Dwarf Boa
  Tropidophis fuscus Hedges and Garrido, 1992 -- valid -- Cuban Dusky Trope
  Tropidophis grapiuna Curcio, Sales Nunes, Suzart Argolo, Skuk and Rodrigues, 2012 -- valid
  Tropidophis greenwayi Barbour and Shreve, 1936 -- valid -- Ambergris Cay Dwarf Boa, Caicos Trope
  Tropidophis greenwayi greenwayi Barbour and Shreve, 1936 -- valid -- Big Ambergris Dwarf Boa
  Tropidophis greenwayi lanthanus Schwartz, 1963 -- valid
  Tropidophis haetianus (Cope, 1879) -- valid -- Haitian Dwarf Boa, Hispaniolan Trope
  Tropidophis haetianus haetianus (Cope, 1879) -- valid
  Tropidophis haetianus hemerus Schwartz, 1975 -- valid -- Hispaniolan Trope
  Tropidophis haetianus jamaicensis Stull, 1928 -- invalid -- Jamaican Brown Trope
  Tropidophis haetianus stejnegeri Grant, 1940 -- invalid
  Tropidophis haetianus stullae Grant, 1940 -- invalid
  Tropidophis haetianus tiburonensis Schwartz, 1975 -- valid -- Haitian Dwarf Boa
  Tropidophis hendersoni Hedges and Garrido, 2002 -- valid
  Tropidophis maculatus (Bibron in Ramon de la Sagra, 1840) -- valid -- Spotted Dwarf Boa, Spotted Red Trope
  Tropidophis melanurus (Schlegel, 1837) -- valid -- Dusky Dwarf Boa, Giant Trope, Wood Snake
  Tropidophis melanurus bucculentus (Cope, 1868) -- invalid
  Tropidophis melanurus dysodes Schwartz and Thomas, 1960 -- valid -- Wood Snake
  Tropidophis melanurus ericksoni Schwartz and Thomas, 1960 -- valid -- Wood Snake
  Tropidophis melanurus melanurus (Schlegel, 1837) -- valid
  Tropidophis morenoi Hedges, Garrido and Díaz, 2001 -- valid -- Zebra Trope
  Tropidophis nigriventris Bailey, 1937 -- valid -- Blackbelly Dwarf Boa, Dark-bellied Trope
  Tropidophis nigriventris hardyi Schwartz and Garrido, 1975 -- invalid
  Tropidophis nigriventris nigriventris Bailey, 1937 -- invalid
  Tropidophis pardalis (Gundlach, 1840) -- valid -- Leopard Dwarf Boa, Spotted Brown Trope
  Tropidophis paucisquamis (Müller in Schenkel, 1901) -- valid -- Brazilian Dwarf Boa
  Tropidophis pilsbryi Bailey, 1937 -- valid -- Oriente White-necked Trope, Pilsbry's Dwarf Boa
  Tropidophis pilsbryi galacelidus Schwartz and Garrido, 1975 -- invalid
  Tropidophis pilsbryi pilsbryi Bailey, 1937 -- invalid
  Tropidophis preciosus Curcio, Sales Nunes, Suzart Argolo, Skuk and Rodrigues, 2012 -- valid
  Tropidophis semicinctus (Gundlach and Peters, 1864) -- valid -- Banded Dwarf Boa, Yellow-banded Trope
  Tropidophis spiritus Hedges and Garrido, 1999 -- valid -- Sancti Spiritus Trope
  Tropidophis taczanowskyi (Steindachner, 1880) -- valid -- Taczanowsky's Dwarf Boa
  Tropidophis wrighti Stull, 1928 -- valid -- Gracile Banded Trope, Wright's Dwarf Boa
  Tropidophis xanthogaster Domínguez, Moreno and Hedges, 2006 -- valid -- Guanahacabibes Trope
  Ungaliophis continentalis Müller, 1880 -- valid -- Boa-enana del Istmo
  Ungaliophis panamensis K. P. Schmidt, 1933 -- valid
  Uromacer catesbyi (Schlegel, 1837) -- valid -- Catesby's Pointed Snake
  Uromacer catesbyi catesbyi (Schlegel, 1837) -- valid
  Uromacer catesbyi cereolineatus Schwartz, 1970 -- valid
  Uromacer catesbyi frondicolor Schwartz, 1970 -- valid
  Uromacer catesbyi hariolatus Schwartz, 1970 -- valid
  Uromacer catesbyi inchausteguii Schwartz, 1970 -- valid
  Uromacer catesbyi insulaevaccarum Schwartz, 1970 -- valid
  Uromacer catesbyi pampineus Schwartz, 1970 -- valid
  Uromacer catesbyi scandax Dunn, 1920 -- valid
  Uromacer frenatus (Günther, 1865) -- valid -- Island Pointed Snake
  Uromacer frenatus chlorauges Schwartz, 1976 -- valid
  Uromacer frenatus dorsalis Dunn, 1920 -- valid
  Uromacer frenatus frenatus (Günther, 1865) -- valid
  Uromacer frenatus wetmorei Cochran, 1931 -- valid
  Uromacer oxyrhynchus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Pointed Snake
  Uromacerina ricardinii (Peracca, 1897) -- valid -- Sao Paulo Sharp Snake
  Urotheca decipiens (Günther, 1893) -- valid -- Pale Ground Snake
  Urotheca fulviceps (Cope, 1886) -- valid
  Urotheca guentheri (Dunn, 1938) -- valid
  Urotheca lateristriga (Berthold, 1859) -- valid
  Urotheca multilineata (Peters, 1863) -- valid
  Urotheca myersi Savage and Lahanas, 1989 -- valid
  Urotheca pachyura (Cope, 1875) -- valid
  Vipera altaica Tuniyev, Nilson and Andrén, 2010 -- valid
  Vipera ammodytes (Linnaeus, 1758) -- valid -- Nose-horned Viper
  Vipera ammodytes ammodytes (Linnaeus, 1758) -- valid
  Vipera ammodytes meridionalis Boulenger, 1903 -- valid
  Vipera ammodytes montandoni Boulenger, 1904 -- valid
  Vipera anatolica Eiselt and Baran, 1970 -- valid -- Anatolian Meadow Viper
  Vipera aspis (Linnaeus, 1758) -- valid -- Asp Viper
  Vipera aspis aspis (Linnaeus, 1758) -- valid
  Vipera aspis atra Meisner, 1820 -- valid
  Vipera aspis francisciredi Laurenti, 1768 -- valid
  Vipera aspis hugyi Schinz, 1833 -- valid
  Vipera aspis zinnikeri Kramer, 1958 -- valid
  Vipera barani Böhme and Joger, 1983 -- valid -- Turkish Viper