The ITIS Logo The Search Results banner for the ITIS Data pages

Source: Snake Species of the World, vol. undetermined, manuscript (version 2004)

ITIS records citing this source
 
 Kingdom Animalia
  Abastor erythrogrammus Gray, 1849 -- invalid
  Acalyptophis Boulenger, 1896 -- invalid
  Acalyptophis peronii (A. M. C. Duméril, 1853) -- invalid
  Acanthophis Daudin, 1803 -- valid -- Death Adder
  Acanthophis antarcticus (Shaw and Nodder, 1802) -- valid -- Common Death Adder
  Acanthophis hawkei Wells and Wellington, 1985 -- valid
  Acanthophis laevis Macleay, 1878 -- valid
  Acanthophis praelongus Ramsay, 1877 -- valid -- Northern Death Adder
  Acanthophis pyrrhus Boulenger, 1898 -- valid -- Desert Death Adder
  Acanthophis rugosus Loveridge, 1948 -- valid
  Acanthophis wellsi Hoser, 1998 -- valid
  Adelophis Dugčs, 1879 -- valid
  Adelophis copei Dugčs, 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 Jan, 1862 -- valid
  Adelphicos daryi Campbell and Ford, 1982 -- valid -- Dary's Burrowing Snake
  Adelphicos ibarrorum Campbell and Brodie, 1988 -- valid
  Adelphicos latifasciatus Lynch and H. M. Smith, 1966 -- invalid -- Culebra-cavadora oaxaqueńa
  Adelphicos nigrilatus H. M. Smith, 1942 -- invalid -- Culebra-cavadora ocotera
  Adelphicos quadrivirgatus Jan, 1862 -- invalid -- Culebra-cavadora centroamericana
  Adelphicos veraepacis Stuart, 1941 -- valid -- Stuart's Burrowing Snake
  Afronatrix Rossman and Eberle, 1977 -- valid
  Afronatrix anoscopus (Cope, 1861) -- valid -- African Brown Water Snake
  Aipysurus Lacépčde, 1804 -- valid
  Aipysurus apraefrontalis M. A. Smith, 1926 -- valid -- Sahul Reef Snake, Short-nosed Seasnake
  Aipysurus duboisii Bavay, 1869 -- valid -- Reef Shallows Seasnake
  Aipysurus eydouxii (Gray, 1849) -- valid -- Spine-tailed Seasnake
  Aipysurus foliosquama M. A. Smith, 1926 -- valid -- Leaf-scaled Seasnake
  Aipysurus fuscus (Tschudi, 1837) -- valid -- Dusky Seasnake, Timor Reef Snake
  Aipysurus laevis Lacépčde, 1804 -- valid -- Olive-brown Seasnake
  Aipysurus laevis laevis Lacépčde, 1804 -- invalid
  Aipysurus laevis pooleorum L. A. Smith, 1974 -- invalid
  Aipysurus tenuis Lönnberg and Andersson, 1913 -- valid -- Arafura Sea Snake
  Alethinophidia Nopcsa, 1923 -- valid
  Alsophis Fitzinger, 1843 -- valid -- West Indian Racers
  Alsophis anomalus (Peters, 1863) -- invalid
  Alsophis antillensis (Schlegel, 1837) -- valid -- Antilles Racer, Leeward Racer
  Alsophis ater (Gosse, 1851) -- invalid
  Alsophis biserialis (Günther, 1860) -- invalid
  Alsophis cantherigerus (Bibron, 1840) -- invalid
  Alsophis dorsalis (Steindachner, 1876) -- invalid
  Alsophis elegans (Tschudi, 1845) -- invalid
  Alsophis melanichnus Cope, 1862 -- invalid
  Alsophis portoricensis Reinhardt and Lütken, 1862 -- invalid -- Puerto Rican 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 sancticrucis Cope, 1862 -- invalid -- St. Croix Racer
  Alsophis slevini (Van Denburgh, 1912) -- invalid
  Alsophis vudii Cope, 1862 -- invalid
  Amastridium Cope, 1861 -- valid
  Amastridium veliferum Cope, 1861 -- valid -- Culebra cabeza cobriza, Rustyhead Snake
  Amblyodipsas Peters, 1857 -- valid
  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 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
  Amphiesma A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Amphiesma andreae Ziegler and Quyet, 2006 -- invalid
  Amphiesma arquus David and Vogel, 2010 -- invalid
  Amphiesma atemporale (Bourret, 1934) -- invalid
  Amphiesma atemporalis (Bourret, 1934) -- invalid
  Amphiesma beddomei (Günther, 1864) -- invalid
  Amphiesma bitaeniata (Wall, 1925) -- invalid
  Amphiesma boulengeri (Gressitt, 1937) -- invalid
  Amphiesma celebica (W. C. H. Peters and Doria, 1878) -- invalid
  Amphiesma celebicum (W. C. H. Peters and Doria, 1878) -- invalid -- Sulawesi Keelback
  Amphiesma concelarum Malnate, 1963 -- invalid
  Amphiesma craspedogaster (Boulenger, 1899) -- invalid
  Amphiesma deschauenseei (Taylor, 1934) -- invalid
  Amphiesma flavifrons (Boulenger, 1887) -- invalid
  Amphiesma frenata (Dunn, 1923) -- invalid
  Amphiesma frenatum (Dunn, 1923) -- invalid
  Amphiesma groundwateri (M. A. Smith, 1922) -- invalid
  Amphiesma inas (Laidlaw, 1901) -- invalid
  Amphiesma ishigakiense (Malnate and Munsterman, 1960) -- invalid
  Amphiesma johannis (Boulenger, 1908) -- invalid
  Amphiesma kerinciense David and Das, 2003 -- invalid
  Amphiesma leucomystax David, Bain, T. Q. Nguyen, Orlov, Vogel, T. N. Vu and Ziegler, 2007 -- invalid
  Amphiesma metusia Inger, Zhao, Shaffer and Wu, 1990 -- invalid
  Amphiesma miyajimae (Maki, 1931) -- invalid
  Amphiesma modesta (Günther, 1875) -- invalid
  Amphiesma modestum (Günther, 1875) -- invalid
  Amphiesma monticola (Jerdon, 1853) -- invalid
  Amphiesma nicobarensis (Sclater, 1891) -- invalid
  Amphiesma nicobariense (Sclater, 1891) -- invalid
  Amphiesma octolineata (Boulenger, 1904) -- invalid
  Amphiesma octolineatum (Boulenger, 1904) -- invalid
  Amphiesma optata (Hu and Zhao, 1966) -- invalid
  Amphiesma optatum (Hu and Zhao, 1966) -- invalid
  Amphiesma parallela (Boulenger, 1890) -- invalid
  Amphiesma parallelum (Boulenger, 1890) -- invalid
  Amphiesma peali (Sclater, 1891) -- invalid
  Amphiesma pealii (Sclater, 1891) -- invalid
  Amphiesma petersii (Boulenger, 1893) -- invalid
  Amphiesma platyceps (Blyth, 1854) -- invalid
  Amphiesma popei (Schmidt, 1925) -- invalid
  Amphiesma pryeri (Boulenger, 1887) -- invalid
  Amphiesma sanguinea (Smedley, 1931) -- invalid
  Amphiesma sanguineum (Smedley, 1931) -- invalid
  Amphiesma sarasinora (Boulenger, 1896) -- invalid
  Amphiesma sarasinorum (Boulenger, 1896) -- invalid
  Amphiesma sarawacense (Günther, 1872) -- invalid
  Amphiesma sarawacensis (Günther, 1872) -- invalid
  Amphiesma sauteri (Boulenger, 1909) -- invalid
  Amphiesma sieboldi (Günther, 1860) -- invalid
  Amphiesma stolata (Linnaeus, 1758) -- invalid
  Amphiesma venningi (Wall, 1910) -- invalid
  Amphiesma vibakari (H. Boie, 1826) -- invalid
  Amphiesma viperina (Schenkel, 1901) -- invalid
  Amphiesma viperinum (Schenkel, 1901) -- invalid
  Amphiesma xenura (Wall, 1907) -- invalid
  Amphiesmoides Malnate, 1961 -- valid
  Amphiesmoides ornaticeps (Werner, 1924) -- valid -- Werner's Ornate Snake
  Anoplohydrus Werner, 1909 -- valid
  Anoplohydrus aemulans Werner, 1909 -- valid
  Antillophis Maglio, 1970 -- invalid
  Antillophis andreai (Reinhardt and Lütken, 1862) -- invalid
  Antillophis parvifrons (Cope, 1862) -- invalid
  Aparallactus A. Smith, 1849 -- valid
  Aparallactus capensis A. Smith, 1849 -- valid -- Cape Centipede Eater
  Aparallactus capensis bocagii Boulenger, 1895 -- invalid
  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 Parker, 1949 -- invalid
  Aparallactus lunulatus scortecci Chabanaud, 1916 -- invalid
  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
  Apostolepis Cope, 1862 -- valid
  Apostolepis ambiniger (Peters, 1869) -- valid
  Apostolepis assimilis (Reinhardt, 1861) -- valid -- Reinhardt's Burrowing Snake
  Apostolepis barrioi Lema, 1978 -- invalid
  Apostolepis cearensis Gomes, 1915 -- valid -- Gomes' Burrowing Snake
  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 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 niceforoi Amaral, 1935 -- valid -- Amazon Burrowing Snake
  Apostolepis nigroterminata Boulenger, 1896 -- valid -- Peru Burrowing Snake
  Apostolepis pymi Boulenger, 1903 -- valid
  Apostolepis quinquelineata Boulenger, 1896 -- invalid
  Apostolepis rondoni Amaral, 1925 -- invalid
  Apostolepis tenuis Ruthven, 1927 -- valid -- Ruthven's Burrowing Snake
  Apostolepis villaricae Lema, 1978 -- invalid
  Apostolepis vittata (Cope, 1887) -- valid
  Arizona Kennicott in Baird, 1859 -- valid -- Glossy Snakes
  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 expolita Klauber, 1946 -- valid
  Arizona elegans noctivaga Klauber, 1946 -- valid -- Arizona Glossy Snake
  Arizona elegans pacata Klauber, 1946 -- invalid
  Arizona elegans philipi Klauber, 1946 -- valid -- Painted Desert Glossy Snake
  Arrhyton Günther, 1858 -- valid -- West Indian Garden Snakes
  Arrhyton ainictum Schwartz and Garrido, 1981 -- valid -- Cuban Island Racer
  Arrhyton callilaemum (Gosse, 1851) -- invalid
  Arrhyton dolichura Werner, 1909 -- valid -- Habana Island Racer
  Arrhyton exiguus (Cope, 1863) -- invalid
  Arrhyton landoi Schwartz, 1965 -- invalid
  Arrhyton polylepis (Buden, 1966) -- invalid
  Arrhyton procerum Hedges and Garrido, 1992 -- valid -- Zapata Long-tailed Groundsnake
  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
  Aspidelaps Fitzinger, 1843 -- valid
  Aspidelaps lubricus (Laurenti, 1768) -- valid -- Cape Coral Snake
  Aspidelaps lubricus cowlesi Bogert, 1940 -- valid -- Angolan Coral Snake
  Aspidelaps lubricus infuscatus Mertens, 1954 -- invalid -- Western Coral Snake
  Aspidelaps lubricus lubricus (Laurenti, 1768) -- valid -- Cape Coral Snake
  Aspidelaps scutatus (A. Smith, 1849) -- valid -- Shield-nose Snake
  Aspidelaps scutatus fulafula (Bianconi, 1849) -- invalid
  Aspidelaps scutatus intermedius Broadley, 1968 -- valid -- Intermediate Shield-nose Snake
  Aspidelaps scutatus scutatus (A. Smith, 1849) -- valid -- Shield-nose Snake
  Aspidomorphus Fitzinger, 1843 -- valid
  Aspidomorphus lineaticollis (Werner, 1903) -- valid -- Striped Crown Snake
  Aspidomorphus mulleri (Schlegel, 1837) -- invalid
  Aspidomorphus schlegelii (Günther, 1872) -- valid -- Schlegel's Crown Snake
  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 copii Günther, 1864 -- valid
  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
  Astrotia Fischer, 1855 -- invalid
  Astrotia stokesii (Gray, 1846) -- invalid
  Atractaspididae -- invalid -- African Burrowing Asps, Stiletto Snakes
  Atractaspis A. Smith, 1849 -- valid -- Stiletto Snakes
  Atractaspis aterrima Günther, 1863 -- valid -- Mole Viper, Slender Burrowing Asp
  Atractaspis battersbyi de Witte, 1959 -- valid -- Battersby's Burrowing Asp, Battersby's Mole Viper
  Atractaspis bibronii A. Smith, 1849 -- valid -- Bibron's Burrowing Asp, Southern Burrowing Asp
  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 coalescens Perret, 1960 -- invalid
  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 engdahli Lönnberg and Andersson, 1913 -- valid -- Mole Viper
  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 microlepidota Günther, 1866 -- valid -- Small-Scaled Burrowing Asp
  Atractaspis microlepidota andersonii Boulenger, 1905 -- invalid
  Atractaspis microlepidota microlepidota Günther, 1866 -- invalid
  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
  Atractus Wagler, 1828 -- 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 andinus Prado, 1944 -- valid -- Andean Ground Snake
  Atractus arangoi Prado, 1939 -- 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 boulengeri Peracca, 1896 -- invalid
  Atractus carrioni Parker, 1930 -- valid -- Parker's Ground Snake
  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 duidensis Roze, 1961 -- valid -- Venezuela Ground Snake
  Atractus dunni Savage, 1955 -- valid -- Dunn's Ground Snake
  Atractus ecuadorensis Savage, 1955 -- valid -- Ecuadorean Ground Snake, Ecuadorian Ground Snake
  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 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 fuliginosus (Hallowell, 1845) -- valid -- Hallowell's Ground Snake
  Atractus gaigeae Savage, 1955 -- valid -- Gaige's Ground Snake
  Atractus guentheri (Wucherer, 1861) -- valid -- Günther's Ground Snake
  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 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 melanogaster Werner, 1916 -- valid -- Blackbelly Ground Snake
  Atractus melas Boulenger, 1908 -- valid -- Dark Ground Snake
  Atractus micheli Mocquard, 1904 -- invalid
  Atractus microrhynchus (Cope, 1868) -- valid
  Atractus modestus Boulenger, 1894 -- valid -- Modest Ground Snake
  Atractus multicinctus (Jan, 1865) -- valid -- Banded Ground Snake
  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 oculotemporalis Amaral, 1932 -- valid -- Hispanic Ground Snake
  Atractus pamplonensis Amaral, 1937 -- valid -- Pamplona Ground Snake
  Atractus paraguayensis Werner, 1924 -- 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 punctiventris Amaral, 1933 -- valid -- Pointed Ground Snake
  Atractus resplendens Werner, 1901 -- valid -- Resplendent Ground Snake
  Atractus reticulatus (Boulenger, 1885) -- valid -- Reticulate Ground Snake
  Atractus riveroi Roze, 1961 -- valid -- Rivero's Ground Snake
  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 steyermarki Roze, 1958 -- valid
  Atractus taeniatus Griffin, 1916 -- valid
  Atractus torquatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Neckband Ground Snake
  Atractus trilineatus Wagler, 1828 -- valid -- Three-lined Ground Snake
  Atractus trivittatus Amaral, 1933 -- valid -- Three-banded Ground Snake
  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 wagleri Prado, 1945 -- valid -- Wagler's Ground Snake
  Atractus werneri Peracca, 1912 -- valid -- Werner's Ground Snake
  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 schistosus (Daudin, 1803) -- invalid
  Atretium yunnanensis Anderson, 1879 -- valid -- Yunnan Olive Keelback
  Austrelaps Worrell, 1963 -- valid
  Austrelaps labialis (Jan, 1859) -- valid -- Pygmy Copperhead
  Austrelaps ramsayi (Krefft, 1864) -- valid -- Highlands Copperhead
  Austrelaps superbus (Günther, 1858) -- valid -- Copperhead Snake, Lowlands Copperhead
  Balanophis H. M. Smith, 1938 -- valid
  Balanophis ceylonensis (Günther, 1858) -- valid -- Sri Lankan Keelback Blossom Krait
  Bascanion anthicum Cope, 1862 -- invalid
  Bascanion piceum Cope, 1892 -- invalid
  Bitia Gray, 1842 -- valid
  Bitia hydroides Gray, 1842 -- valid -- Keel-bellied Mud Snake
  Blythia Theobold, 1868 -- valid
  Blythia reticulata (Blyth, 1854) -- valid -- Blyth's Reticulate Snake
  Bogertophis subocularis (Brown, 1901) -- valid -- Culebra-ratonera de Transpecos, Trans-Pecos Rat Snake
  Boulengerina Dollo, 1886 -- invalid
  Boulengerina annulata (Buchholz and Peters in Peters, 1876) -- invalid
  Boulengerina annulata annulata (Buchholz and Peters in Peters, 1876) -- invalid
  Boulengerina annulata stormsi Dollo, 1886 -- invalid
  Boulengerina christyi Boulenger, 1904 -- invalid
  Brachyophis Mocquard, 1888 -- 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
  Brachyorrhos Kuhl in Schlegel, 1826 -- valid
  Brachyorrhos albus (Linnaeus, 1758) -- valid -- Seram Short-tailed Snake
  Brachyorrhos jobiensis (Meyer, 1874) -- invalid
  Bungarus Daudin, 1803 -- valid
  Bungarus andamanensis Biswas and Sanyal, 1978 -- valid -- South Andaman Krait
  Bungarus bungaroides (Cantor, 1839) -- valid -- Northeastern Hill Krait
  Bungarus caeruleus (Schneider, 1801) -- valid -- Common Krait, Indian Krait
  Bungarus candidus (Linnaeus, 1758) -- valid -- Blue Krait
  Bungarus ceylonicus Günther, 1864 -- valid -- Ceylon Krait
  Bungarus fasciatus (Schneider, 1801) -- valid -- Banded Krait
  Bungarus flaviceps Reinhardt, 1843 -- valid -- Red-headed Krait
  Bungarus flaviceps baluensis Loveridge, 1938 -- valid
  Bungarus flaviceps flaviceps Reinhardt, 1843 -- valid
  Bungarus lividus Cantor, 1839 -- valid -- Lesser Black Krait
  Bungarus magnimaculatus Wall and Evans, 1901 -- valid -- Burmese Krait
  Bungarus multicinctus Blyth, 1861 -- valid -- Many-banded Krait
  Bungarus multicinctus multicinctus Blyth, 1861 -- valid
  Bungarus multicinctus wanghaotingi Pope, 1928 -- valid
  Bungarus niger Wall, 1908 -- valid -- Greater Black Krait
  Bungarus sindanus Boulenger, 1897 -- valid -- Sind Krait
  Bungarus sindanus razai Khan, 1985 -- invalid
  Bungarus sindanus sindanus Boulenger, 1897 -- invalid
  Bungarus sindanus walli Wall, 1907 -- invalid
  Cacophis Günther, 1863 -- valid
  Cacophis churchilli Wells and Wellington, 1985 -- valid
  Cacophis harriettae Krefft, 1869 -- valid -- White-crowned Snake, White-naped Snake
  Cacophis krefftii Günther, 1863 -- valid -- Dwarf Crowned Snake, Krefft's Dwarf Snake
  Cacophis squamulosus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Golden Crowned Snake
  Calamaria tenuis Baird and Girard, 1852 -- invalid
  Calamodontophis Amaral, 1963 -- valid
  Calamodontophis paucidens (Amaral, 1936) -- valid -- Tropical Forest Snake
  Calliophis Gray, 1835 -- valid
  Calliophis beddomei M. A. Smith, 1943 -- valid -- Beddome's Coral Snake
  Calliophis bibroni (Jan, 1858) -- valid -- Bibron's Coral Snake
  Calliophis bivigrata (F. Boie, 1827) -- invalid
  Calliophis bivigrata bivigrata (F. Boie, 1827) -- invalid
  Calliophis bivigrata flaviceps (Cantor, 1839) -- invalid
  Calliophis bivigrata tetrataenia (Bleeker, 1859) -- invalid
  Calliophis gracillis Gray in Gray and Hardwicke, 1835 -- invalid
  Calliophis hatori Takahashi, 1930 -- invalid
  Calliophis intestinalis (Laurenti, 1768) -- valid -- Banded Malaysian Coral Snake, Striped Coral Snake
  Calliophis intestinalis bilineata W. C. H. Peters, 1881 -- invalid
  Calliophis intestinalis bilineatus W. C. H. Peters, 1881 -- valid
  Calliophis intestinalis intestinalis (Laurenti, 1768) -- valid
  Calliophis intestinalis lineata (Gray in Gray and Hardwicke, 1835) -- invalid
  Calliophis intestinalis lineatus (Gray in Gray and Hardwicke, 1835) -- valid
  Calliophis intestinalis philippina Günther, 1864 -- invalid
  Calliophis intestinalis philippinus Günther, 1864 -- valid
  Calliophis intestinalis suluensis Steindachner, 1891 -- valid
  Calliophis intestinalis thepassi (Bleeker, 1859) -- valid
  Calliophis maculiceps (Günther, 1858) -- valid -- Small-spotted Coral Snake, Speckled Coral Snake
  Calliophis maculiceps atrofrontalis (Sauvage, 1877) -- valid
  Calliophis maculiceps maculiceps (Günther, 1858) -- valid
  Calliophis maculiceps michaelis Deuve, 1961 -- valid
  Calliophis maculiceps smithi Klemmer, 1963 -- valid
  Calliophis melanurus (Shaw, 1802) -- valid -- Indian Coral Snake, Slender Coral Snake
  Calliophis melanurus melanurus (Shaw, 1802) -- valid
  Calliophis melanurus sinhaleyus Deraniyagala, 1951 -- valid
  Calliophis nigrescens Günther, 1862 -- valid -- Black Coral Snake
  Calliophis sauteri (Steindachner, 1913) -- invalid
  Cantoria Girard, 1858 -- valid
  Cantoria annulata de Jong, 1926 -- invalid
  Cantoria violacea Girard, 1858 -- valid -- Cantor's Water Snake
  Carphophis Gervais, 1843 -- valid -- Worm Snakes, Wormsnakes
  Carphophis amoenus (Say, 1825) -- valid -- Eastern Worm Snake, Eastern Wormsnake
  Carphophis vermis (Kennicott, 1859) -- valid -- Western Worm Snake, Western Wormsnake
  Celuta helenae Kennicott, 1859 -- invalid
  Celuta vermis Kennicott, 1859 -- invalid
  Cerberus Cuvier, 1829 -- valid -- Dog-faced Water Snakes
  Cerberus microlepis Boulenger, 1896 -- valid -- Lake Buhi Bockadam
  Cerberus rynchops (Schneider, 1799) -- valid -- Dog-faced Water Snake, South Asian Bockadam
  Cerberus rynchops novaeguineae Loveridge, 1948 -- invalid
  Cerberus rynchops rynchops (Schneider, 1799) -- invalid
  Cercophis Fitzinger, 1843 -- valid
  Cercophis auratus (Schlegel, 1837) -- valid -- Schlegel's Golden Snake
  Chersodromus Reinhardt, 1860 -- valid
  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
  Chilorhinophis Werner, 1907 -- valid
  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
  Clelia Fitzinger, 1826 -- valid
  Clelia bicolor (Peracca, 1904) -- invalid
  Clelia clelia (Daudin, 1803) -- valid -- Culebra-viborera común
  Clelia clelia clelia (Daudin, 1803) -- valid
  Clelia clelia plumbea (Wied-Neuwied, 1820) -- invalid
  Clelia equatoriana (Amaral, 1924) -- valid -- Equatorial Mussurana
  Clelia errabunda Underwood, 1993 -- valid -- Underwood's Mussurana
  Clelia rustica (Cope, 1878) -- invalid
  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
  Coluber abacurus Holbrook, 1836 -- invalid
  Coluber aesculapii Linnaeus, 1766 -- invalid
  Coluber aestivus Linnaeus, 1766 -- invalid
  Coluber agilis Linnaeus, 1766 -- invalid
  Coluber amoenus Say, 1825 -- invalid
  Coluber calligaster Harlan, 1827 -- invalid
  Coluber catenifer Blainville, 1835 -- invalid
  Coluber coccineus Blumenbach, 1788 -- invalid
  Coluber constrictor anthicus (Cope, 1862) -- valid -- Buttermilk Racer, Buttermilk Snake
  Coluber constrictor constrictor Linnaeus, 1758 -- valid -- Northern Black Racer
  Coluber constrictor mormon Baird and Girard, 1852 -- valid -- Western Yellow-bellied Racer
  Coluber constrictor oaxaca (Jan, 1863) -- valid -- Mexican Racer
  Coluber corais F. Boie, 1827 -- invalid
  Coluber doliatus Linnaeus, 1766 -- invalid
  Coluber elapsoides Holbrook, 1838 -- invalid
  Coluber eques Reuss, 1834 -- invalid
  Coluber erythrogaster Forster in Bossu, 1771 -- invalid
  Coluber erythrogrammus Daudin, 1803 -- invalid
  Coluber fasciatus Linnaeus, 1766 -- invalid
  Coluber flagellum Shaw, 1802 -- valid -- Coachwhip, Culebra-chirriadora común
  Coluber flaviventris Say in James, 1823 -- invalid
  Coluber fulvius Linnaeus, 1766 -- invalid
  Coluber guttatus Linnaeus, 1766 -- invalid
  Coluber infernalis Blainville, 1835 -- invalid
  Coluber melanoleucus Daudin, 1803 -- invalid
  Coluber obsoletus Say in James, 1823 -- invalid
  Coluber occipitomaculatus Storer, 1839 -- invalid
  Coluber parietalis Say in James, 1823 -- invalid
  Coluber proximus Say in James, 1823 -- invalid
  Coluber quadrivittatus Holbrook, 1836 -- invalid
  Coluber rhombomaculatus Holbrook, 1840 -- invalid
  Coluber rigidus Say, 1825 -- invalid
  Coluber saurita Linnaeus, 1766 -- invalid
  Coluber septemvittatus Say, 1825 -- invalid
  Coluber simus Linnaeus, 1766 -- invalid
  Coluber sipedon Linnaeus, 1758 -- invalid
  Coluber sirtalis Linnaeus, 1758 -- invalid
  Coluber striatula Linnaeus, 1766 -- invalid
  Coluber subocularis Brown, 1901 -- invalid
  Coluber testaceus Say in James, 1823 -- invalid
  Coluber triangulum Lacépčde, 1789 -- invalid
  Coluber triaspis Cope, 1866 -- invalid
  Coluber vernalis Harlan, 1827 -- invalid
  Coluber zonatus Blainville, 1835 -- invalid
  Colubridae Oppel, 1811 -- valid -- Colubrids, Typical Snakes
  Coniophanes Hallowell in Cope, 1860 -- valid -- Black-striped Snakes
  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 dromiciformis (Peters, 1863) -- valid -- Peters' Running Snake
  Coniophanes fissidens (Günther, 1858) -- valid -- Culebra vientre amarillo, Yellowbelly Snake
  Coniophanes imperialis (Kennicott in Baird, 1859) -- valid -- Black-striped Snake, Culebra rayas negras, Regal Black-striped Snake
  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 meridanus Schmidt and Andrews, 1936 -- valid -- Culebra sin rayas-peninsular, Peninsula Stripeless Snake
  Coniophanes piceivittis Cope, 1869 -- valid -- Cope's Black-striped Snake, Culebra rayada-de Cope
  Coniophanes quinquevittatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra rayada-escofinada, Fife-striped Snake
  Conophis Peters, 1860 -- valid
  Conophis lineatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-guardacaminos lineada, Road Guarder
  Conophis vittatus Peters, 1860 -- valid -- Culebra-guardacaminos rayada, Striped Road Guarder
  Contia Baird and Girard, 1853 -- valid -- Sharp-tailed Snakes
  Contia isozona Cope, 1867 -- invalid
  Contia pygaea Cope, 1871 -- invalid
  Contia tenuis (Baird and Girard, 1852) -- valid -- Sharp-tailed Snake, Sharptail Snake
  Crisantophis Villa, 1971 -- valid
  Crisantophis nevermanni (Dunn, 1937) -- valid -- Dunn's Road Guarder
  Cryophis Bogert and Duellman, 1963 -- valid
  Cryophis hallbergi Bogert and Duellman, 1963 -- valid -- Culebra-de nebklina de Hallberg, Hallberg's Cloud Forest Snake
  Darlingtonia Cochran, 1935 -- invalid
  Darlingtonia haetiana Cochran, 1935 -- invalid
  Demansia Günther, 1858 -- valid
  Demansia atra (Macleay, 1884) -- invalid
  Demansia calodera Storr, 1978 -- valid -- Black-necked Whipsnake
  Demansia olivacea (Gray, 1842) -- valid -- Marble-headed Whip Snake, Olive Whipsnake
  Demansia papuensis (Macleay, 1877) -- valid -- Papuan Whip Snake
  Demansia papuensis melaena Storr, 1978 -- valid
  Demansia papuensis papuensis (Macleay, 1877) -- valid
  Demansia psammophis (Schlegel, 1837) -- valid -- Yellow-faced Whip Snake, Yellow-faced Whipsnake
  Demansia reticulata (Gray, 1842) -- valid -- Yellow-faced Whip Snake, Yellow-faced Whipsnake
  Demansia reticulata cupreiceps Storr, 1978 -- invalid
  Demansia reticulata reticulata (Gray, 1842) -- invalid
  Demansia rufescens Storr, 1978 -- valid -- Rufous Whipsnake
  Demansia simplex Storr, 1978 -- valid -- Grey Whipsnake
  Demansia torquata (Günther, 1862) -- valid -- Collared Whip Snake, Collared Whipsnake
  Dendroaspis Schlegel, 1848 -- valid
  Dendroaspis angusticeps (A. Smith, 1849) -- valid -- Green Mamba
  Dendroaspis jamesoni (Traill in Schlegel, 1843) -- valid -- Jameson's Mamba
  Dendroaspis jamesoni jamesoni (Traill in Schlegel, 1843) -- valid
  Dendroaspis jamesoni kaimosae Loveridge, 1936 -- valid
  Dendroaspis polylepis Günther, 1864 -- valid -- Black Mamba
  Dendroaspis viridis (Hallowell, 1844) -- valid -- Western Green Mamba
  Denisonia Krefft, 1869 -- valid
  Denisonia devisi Waite and Longman, 1920 -- valid -- De Vis Banded Snake, De Vis's Banded Snake
  Denisonia maculata (Steindachner, 1867) -- valid -- Ornamental Snake
  Diadophis Baird and Girard, 1853 -- valid -- Ring-necked Snakes
  Diadophis punctatus (Linnaeus, 1766) -- valid -- couleuvre ŕ collier, Culebra de collar, Ring-necked Snake, Ringneck Snake
  Diadophis punctatus acricus Paulson, 1966 -- valid -- Key Ringneck Snake
  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 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
  Diadophis rubescens Cope, 1885 -- invalid
  Diaphorolepis Jan, 1863 -- valid
  Diaphorolepis wagneri Jan, 1863 -- valid -- Ecuador Frog-eating Snake
  Dipsas Laurenti, 1768 -- valid
  Dipsas albifrons (Sauvage, 1884) -- valid -- Sauvage's Snail-eater
  Dipsas articulata (Cope, 1868) -- valid -- American Snail-eater
  Dipsas bicolor (Günther, 1895) -- valid -- Two-colored Snail-eater
  Dipsas boettgeri (Werner, 1901) -- invalid
  Dipsas brevifacies (Cope, 1866) -- valid -- Culebra-caracolera chata, Snail-eating Thirst Snake
  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 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 latifasciata (Boulenger, 1913) -- invalid
  Dipsas latifrontalis (Boulenger, 1905) -- invalid
  Dipsas neivai Amaral, 1926 -- invalid
  Dipsas oreas (Cope, 1868) -- valid -- Ecuador Snail-eater
  Dipsas pavonina Schlegel, 1837 -- valid -- Northern Snail-eater
  Dipsas perijanensis (Aleman, 1953) -- invalid
  Dipsas peruana (Boettger, 1898) -- valid -- Peru Snail-eater
  Dipsas poecilolepis (Amaral, 1923) -- invalid
  Dipsas polylepis (Boulenger, 1912) -- invalid
  Dipsas pratti (Boulenger, 1897) -- valid -- Pratt's Snail-eater
  Dipsas sanctijoannis (Boulenger, 1911) -- valid -- Tropical Snail-eater
  Dipsas schunkii (Boulenger, 1908) -- valid -- Schunk's Snail-eater
  Dipsas septentrionalis Kennicott in Baird, 1859 -- invalid
  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 vermiculata Peters, 1960 -- valid -- Vermiculate Snail-eater
  Dipsas viguieri (Bocourt, 1884) -- valid -- Bocourt's Snail-eater
  Ditaxodon Hoge, 1958 -- valid
  Ditaxodon taeniatus (Peters in Hensel, 1868) -- valid -- Hensel's Snake
  Drepanoides Dunn, 1928 -- valid
  Drepanoides anomalus (Jan, 1863) -- valid -- Black-collared Snake
  Dromicus flavilatus Cope, 1871 -- invalid
  Dryinus aeneus Wagler, 1824 -- invalid
  Drymarchon corais couperi (Holbrook, 1842) -- invalid -- Eastern Indigo Snake
  Drymarchon corais erebennus (Cope, 1860) -- invalid -- Texas Indigo Snake
  Drysdalia Worrell, 1961 -- valid
  Drysdalia coronoides (Günther, 1858) -- valid -- White-lipped Snake
  Drysdalia mastersii (Krefft, 1866) -- valid -- Masters' Snake
  Drysdalia rhodogaster (Jan in Jan and Sordelli, 1873) -- valid -- Mustard-bellied Snake
  Echinanthera Cope, 1894 -- valid
  Echinanthera affinis (Günther, 1858) -- invalid
  Echinanthera amoenus (Jan, 1863) -- invalid
  Echinanthera bilineata (Fischer, 1885) -- invalid
  Echinanthera brevirostris (Peters, 1863) -- invalid
  Echinanthera cyanopleura (Cope, 1885) -- valid
  Echinanthera melanostigma (Wagler, 1824) -- valid
  Echinanthera occipitalis (Jan, 1863) -- invalid
  Echinanthera persimilis (Cope, 1868) -- invalid
  Echinanthera poecilopogon (Cope, 1863) -- invalid
  Echinanthera undulatus (Wied-Neuwied, 1824) -- invalid
  Echiopsis Fitzinger, 1843 -- valid
  Echiopsis atriceps (Storr, 1980) -- invalid
  Echiopsis curta (Schlegel, 1837) -- valid -- Bardick
  Elaphe emoryi emoryi (Baird and Girard, 1853) -- invalid
  Elaphe guttata emoryi (Baird and Girard, 1853) -- invalid -- Great Plains Rat Snake
  Elaphe guttata guttata (Linnaeus, 1766) -- invalid
  Elaphe obsoleta spiloides (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid -- Gray Rat Snake
  Elaphe rosaliae (Mocquard, 1899) -- invalid
  Elaphe spiloides (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid -- Gray Ratsnake
  Elaphe subocularis (Brown, 1901) -- invalid
  Elaphe triaspis (Cope, 1866) -- invalid
  Elaphe vulpina gloydi Conant, 1940 -- invalid
  Elaphe vulpina vulpina (Baird and Girard, 1853) -- invalid
  Elapidae -- valid -- Cobras, Coral Snakes, Coralsnakes, Elapids, Kraits
  Elapinae -- valid
  Elapognathus Boulenger, 1896 -- valid
  Elapognathus coronata (Schlegel, 1837) -- invalid
  Elapognathus minor (Günther, 1863) -- valid -- Little Brown Snake, Short-nosed Snake
  Elapoidis H. Boie in F. Boie, 1827 -- valid
  Elapoidis fuscus F. Boie in H. Boie, 1827 -- invalid
  Elapomorphus Wiegmann, 1843 -- valid
  Elapomorphus cuyanus Cei, 1984 -- invalid
  Elapomorphus lemniscatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- invalid
  Elapomorphus lepidus Reinhardt, 1861 -- invalid
  Elapomorphus mertensi Hoge, 1955 -- invalid
  Elapomorphus nasutus Gomes, 1915 -- invalid
  Elapomorphus punctatus Lema, 1979 -- invalid
  Elapomorphus quinquelineatus (Raddi, 1820) -- valid -- Raddi's Lizard-eating Snake
  Elapomorphus spegazzinii Boulenger, 1913 -- invalid
  Elapomorphus tricolor A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- invalid
  Elapomorphus wuchereri Günther, 1861 -- valid -- Wucherer's Lizard-eating Snake
  Elapotinus Jan, 1862 -- valid
  Elapotinus picteti Jan, 1862 -- valid
  Elaps balzani Boulenger, 1898 -- invalid
  Elaps calligaster Wiegmann in Meyen, 1835 -- invalid
  Elaps hippocrepis W. C. H. Peters, 1862 -- invalid
  Elaps macclellandi Reinhardt, 1844 -- invalid
  Elaps scutiventris Cope, 1870 -- invalid
  Elaps tenere Baird and Girard, 1853 -- invalid
  Elapsoidea Bocage, 1866 -- valid
  Elapsoidea boulengeri Boettger, 1895 -- valid -- Boulenger's Garter Snake
  Elapsoidea broadleyi Jakobsen, 1997 -- valid
  Elapsoidea chelazziorum Lanza, 1979 -- valid -- Somali Garter Snake
  Elapsoidea guentherii Bocage, 1866 -- valid -- Günther's Garter Snake
  Elapsoidea laticincta (Werner, 1919) -- valid -- Werner's Garter Snake
  Elapsoidea loveridgei Parker, 1949 -- valid -- East African Garter Snake, Loveridge's Garter Snake
  Elapsoidea loveridgei colleti Laurent, 1956 -- valid
  Elapsoidea loveridgei loveridgei Parker, 1949 -- valid
  Elapsoidea loveridgei multicincta Laurent, 1956 -- valid
  Elapsoidea nigra Günther, 1888 -- valid -- Black Garter Snake
  Elapsoidea semiannulata Bocage, 1882 -- valid -- Angolan Garter Snake
  Elapsoidea semiannulata moebiusi (Werner, 1897) -- valid
  Elapsoidea semiannulata semiannulata Bocage, 1882 -- valid
  Elapsoidea sunderwallii (A. Smith, 1848) -- invalid
  Elapsoidea sunderwallii decasteri Boulenger, 1888 -- invalid
  Elapsoidea sunderwallii fitzsimonsi Loveridge, 1944 -- invalid
  Elapsoidea sunderwallii longicauda Broadley, 1971 -- invalid
  Elapsoidea sunderwallii media Broadley, 1971 -- invalid
  Elapsoidea sunderwallii sunderwallii (A. Smith, 1848) -- invalid
  Elapsoidea trapei Mane, 1999 -- valid
  Emmochliophis Fritts and H. M. Smith, 1969 -- valid
  Emmochliophis fugleri Fritts and H. M. Smith, 1969 -- valid -- Pinchinda Snake
  Emydocephalus Krefft, 1869 -- valid
  Emydocephalus annulatus Krefft, 1869 -- valid -- Egg-eating Sea Snake, Turtle-headed Seasnake
  Emydocephalus ijimae Stejneger, 1898 -- valid -- Turtlehead Sea Snake
  Enhydrina Gray, 1849 -- invalid
  Enhydrina schistosa (Daudin, 1803) -- invalid
  Enhydrina zweifeli Kharin, 1985 -- invalid
  Enhydris Latreille in Sonnini and Latreille, 1801 -- valid
  Enhydris albomaculata (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Enhydris alternans (Reuss, 1833) -- invalid
  Enhydris bennetti (Gray, 1842) -- invalid
  Enhydris bocourti (Jan, 1865) -- invalid
  Enhydris chinensis (Gray, 1842) -- invalid
  Enhydris doriae (Peters, 1871) -- invalid
  Enhydris dussumieri (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Enhydris enhydris (Schneider, 1799) -- valid -- Rainbow Mud Snake
  Enhydris indica (Gray, 1842) -- invalid
  Enhydris innominata (Morice, 1875) -- valid -- Tay Ninh Mud Snake
  Enhydris jagorii (Peters, 1863) -- valid -- Bangkok Mud Snake
  Enhydris longicauda (Bourret, 1934) -- valid -- Long-tailed Mud Snake
  Enhydris maculosa (Blanford, 1881) -- invalid
  Enhydris matannensis (Boulenger, 1897) -- invalid
  Enhydris pahangensis Tweedie, 1946 -- invalid
  Enhydris pakistanica Mertens, 1959 -- invalid
  Enhydris plumbea (H. Boie in F. Boie, 1827) -- invalid
  Enhydris polylepis (Fischer, 1886) -- invalid
  Enhydris punctata (Gray, 1849) -- invalid
  Enhydris sieboldii (Schlegel, 1837) -- invalid
  Enhydris smithi (Boulenger, 1914) -- invalid
  Enulius Cope, 1871 -- valid
  Enulius bifoveatus McCranie and Köhler, 1999 -- valid
  Enulius flavitorques (Cope, 1868) -- valid -- Culebra-cola larga del Pacífico, Pacific Longtail Snake
  Enulius oligostichus H. M. Smith, Arndt and Sherbrook, 1967 -- valid -- Culebra-cola larga mexicana, Mexican Longtail Snake
  Enulius roatanensis McCranie and Köhler, 1999 -- valid
  Enulius sclateri (Boulenger, 1894) -- invalid
  Ephalophis M. A. Smith, 1931 -- valid
  Ephalophis greyi M. A. Smith, 1931 -- invalid
  Eridiphas Leviton and Tanner, 1960 -- invalid
  Eridiphas slevini (Tanner, 1943) -- invalid -- Culebra-nocturna de Baja California
  Erpeton Lacépčde, 1801 -- valid
  Erpeton tentaculatus Lacépčde in Latreille, 1801 -- invalid
  Erythrolamprus Wagler, 1830 -- valid -- Coral Snake Mimics
  Erythrolamprus aesculapii (Linnaeus, 1766) -- invalid
  Erythrolamprus bizona Jan, 1863 -- valid -- False Coral Snake
  Erythrolamprus guentheri Garman, 1883 -- valid -- Günther's False Coral Snake
  Erythrolamprus mimus (Cope, 1868) -- valid -- Mimic False Coral Snake
  Erythrolamprus ocellatus Peters, 1869 -- valid -- Red Snake, Tobago False Coral Snake
  Erythrolamprus pseudocorallus Roze, 1959 -- valid -- False Coral Snake
  Eutaenia atrata Kennicott in Cooper, 1860 -- invalid
  Eutaenia biscutata Cope, 1883 -- invalid
  Eutaenia brachystoma Cope, 1892 -- invalid
  Eutaenia butleri Cope, 1889 -- invalid
  Eutaenia cyrtopsis Kennicott, 1860 -- invalid
  Eutaenia cyrtopsis ocellata Cope, 1880 -- invalid
  Eutaenia elegans Baird and Girard, 1853 -- invalid
  Eutaenia elegans lineolata Cope, 1892 -- invalid
  Eutaenia hammondii Kennicott, 1860 -- invalid
  Eutaenia haydenii Kennicott, 1860 -- invalid
  Eutaenia marcianus Baird and Girard, 1853 -- invalid
  Eutaenia megalops Kennicott, 1860 -- invalid
  Eutaenia pickeringii Baird and Girard, 1853 -- invalid
  Eutaenia radix Baird and Girard, 1853 -- invalid
  Eutaenia sirtalis tetrataenia Cope in Yarrow, 1875 -- invalid
  Eutaenia vagrans Baird and Girard, 1853 -- invalid
  Farancia Gray, 1842 -- valid -- Mud Snakes, Mudsnakes, Rainbow Snakes
  Farancia abacura (Holbrook, 1836) -- valid -- Mud Snake, Mudsnake
  Farancia erytrogramma (Palissot de Beauvois, 1801) -- valid -- Rainbow Snake
  Farancia erytrogramma erytrogramma (Palissot de Beauvois, 1801) -- valid -- Rainbow Snake
  Farancia reinwardtii (Schlegel, 1837) -- invalid
  Ficimia cana (Cope, 1860) -- invalid
  Ficimia olivacea streckeri Taylor, 1931 -- invalid
  Ficimia streckeri Taylor, 1931 -- valid -- Culebra-naricilla mexicana, Mexican Hook-nosed Snake, Mexican Hooknose Snake, Tamaulipan Hook-nosed Snake, Tamaulipan Hooknose Snake
  Fordonia Gray, 1837 -- valid
  Fordonia leucobalia (Schlegel, 1837) -- valid -- Crab-eating Snake
  Furina A. M. C. Duméril, 1853 -- valid
  Furina barnardi (Kinghorn, 1939) -- valid -- Yellow-naped Snake
  Furina diadema (Schlegel, 1837) -- valid -- Red-naped Snake
  Furina dunmalli (Worrell, 1955) -- valid -- Dunmall's Snake
  Furina ornata (Gray, 1842) -- valid -- Orange-naped Snake
  Furina tristis (Günther, 1858) -- valid -- Brown-headed, Grey-naped Snake
  Geagras Cope, 1876 -- valid
  Geagras redimitus Cope, 1876 -- valid -- Culebra-minera de Tehuantepec, Tehuantepec Striped Snake
  Geophis Wagler, 1830 -- valid
  Geophis anocularis Dunn, 1920 -- valid -- Culebra-minera de Sierra Mije, Sierra Mije Earth Snake
  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 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 -- Dugčs' Earth Snake
  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 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 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 nigroalbus Boulenger, 1908 -- valid
  Geophis nigrocinctus Duellman, 1959 -- valid -- Black-banded Earth Snake, Culebra-minera rayas negras
  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 tarascae Hartweg, 1959 -- valid -- Culebra-miandora tarasca, Tarascan Earth Snake
  Geophis zeledoni Taylor, 1954 -- valid
  Gerarda Gray, 1849 -- valid
  Gerarda prevostiana (Eydoux and Gervais, 1837) -- valid -- Gerard's Water Snake
  Gomesophis Hoge and Mertens, 1959 -- valid
  Gomesophis brasiliensis (Gomes, 1918) -- valid -- Brazilian Burrowing Snake
  Gyalopion canum (Cope, 1860) -- valid -- Chihuahuan Hook-nosed Snake, Culebra-nariz ganchuda de Chihuahua, Western Hook-nosed Snake, Western Hooknose Snake
  Haldea Baird and Girard, 1853 -- valid
  Haldea striatula (Linnaeus, 1766) -- valid -- Rough Earth Snake, Rough Earthsnake
  Haldea valeriae (Baird and Girard, 1853) -- valid -- Smooth Earth Snake, Smooth Earthsnake
  Haldea valeriae elegans (Kennicott, 1859) -- valid -- Western Earth Snake, Western Smooth Earthsnake
  Haldea valeriae pulchra Richmond, 1954 -- valid -- Mountain Earth Snake
  Haldea valeriae valeriae (Baird and Girard, 1853) -- valid -- Eastern Earth Snake
  Haplocercus Günther, 1858 -- invalid
  Haplocercus ceylonensis Günther, 1858 -- invalid
  Helicops Wagler, 1828 -- valid
  Helicops angulatus (Linnaeus, 1758) -- valid -- Brown-banded Watersnake, Mountain Keelback
  Helicops carinicaudus (Wied-Neuwied, 1825) -- valid -- Wied's Keelback
  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 hogei Lancini, 1964 -- invalid
  Helicops leopardinus (Schlegel, 1837) -- valid -- Leopard Keelback
  Helicops modestus Günther, 1861 -- valid -- Olive Keelback
  Helicops pastazae Shreve, 1934 -- valid -- Shreve's Keelback
  Helicops pertersi Rossman, 1976 -- invalid
  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 trivittatus (Gray, 1849) -- valid -- Equatorial Keelback
  Helicops yacu Rossman and Dixon, 1975 -- valid -- Peru Keelback
  Hemachatus Fleming, 1822 -- valid
  Hemachatus haemachatus (Bonnaterre, 1790) -- valid -- Ring-necked Spitting Cobra, Ringhals, Rinkhals
  Hemiaspis Fitzinger, 1861 -- valid
  Hemiaspis damelii (Günther, 1876) -- valid -- Grey Snake
  Hemiaspis signata (Jan, 1859) -- valid -- Black-bellied Swamp Snake, Marsh Snake, Swamp Snake
  Hemibungarus W. C. H. Peters, 1862 -- valid
  Hemibungarus calligaster (Wiegmann in Meyen, 1835) -- valid -- Barred Coral Snake
  Hemibungarus calligaster calligaster (Wiegmann in Meyen, 1835) -- valid
  Hemibungarus calligaster gemianulis W. C. H. Peters, 1872 -- valid
  Hemibungarus calligaster mcclungi Taylor, 1922 -- valid
  Hemibungarus hatori (Takahashi, 1930) -- invalid
  Hemibungarus japonicus (Günther, 1868) -- invalid
  Hemibungarus kelloggi Pope, 1928 -- invalid
  Hemibungarus macclellandi (Reinhardt, 1844) -- invalid
  Hemibungarus sauteri (Steindachner, 1913) -- invalid
  Herpetodryas margaritiferus Schlegel, 1837 -- invalid
  Heterodon Latreille in Sonnini and Latreille, 1801 -- valid -- Hog-nosed Snakes, North American Hog-nosed Snakes
  Heterodon browni Stejneger, 1903 -- invalid
  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 platyrhinos Latreille, 1801 -- invalid
  Heterodon platyrhinos browni Stejneger, 1903 -- invalid
  Heterodon platyrhinos platyrhinos Latreille, 1801 -- invalid
  Heterodon simus (Linnaeus, 1766) -- valid -- Southern Hog-nosed Snake, Southern Hognose Snake
  Heurnia de Jong, 1926 -- valid
  Heurnia ventromaculata de Jong, 1926 -- valid -- Mamberano Mud Snake
  Hologerrhum Günther, 1858 -- valid
  Hologerrhum dermali Brown, Leviton, Ferner and Sison, 2001 -- valid
  Hologerrhum philippinum Günther, 1858 -- valid -- Philippine Stripe-lipped Snake
  Homalocranium atriceps Günther, 1895 -- invalid
  Homalocranium wagneri Jan, 1862 -- invalid
  Homalopsinae Bonaparte, 1845 -- invalid
  Homalopsis Kuhl and Hasselt, 1822 -- valid
  Homalopsis buccata (Linnaeus, 1758) -- valid -- Linne's Water Snake
  Homoroselaps Jan, 1858 -- valid
  Homoroselaps dorsalis (A. Smith, 1849) -- valid -- Striped Dwarf Garter Snake, Striped Harelquin Snake
  Homoroselaps lacteus (Linnaeus, 1758) -- valid -- Spotted Harlequin Snake
  Hoplocephalus Wagler, 1830 -- valid
  Hoplocephalus bitorquatus (Jan, 1859) -- valid -- Pale-headed Snake
  Hoplocephalus bungaroides Wagler, 1830 -- invalid
  Hoplocephalus stephensii Krefft, 1869 -- valid -- Stephens's Banded Snake
  Hydrablables Boulenger, 1891 -- invalid
  Hydrablables periops (Günther, 1872) -- invalid
  Hydrablables praefrontalis (Mocquard, 1890) -- invalid
  Hydraethiops Günther, 1872 -- valid
  Hydraethiops laevis Boulenger, 1904 -- valid
  Hydraethiops melanogaster Günther, 1872 -- valid -- Blackbelly Snake
  Hydrelaps Boulenger, 1896 -- valid
  Hydrelaps darwiniensis Boulenger, 1896 -- valid -- Port Darwin Seasnake
  Hydrodynastes Fitzinger, 1843 -- valid
  Hydrodynastes bicinctus (Herrmann, 1804) -- valid -- Herrmann's Water Snake
  Hydrodynastes gigas (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- False Water Cobra
  Hydromorphus Peters, 1859 -- valid
  Hydromorphus concolor Peters, 1859 -- valid -- Costa Rica Water Snake
  Hydromorphus dunni Slevin, 1942 -- valid -- Dunn's Water Snake
  Hydrophis Latreille in Sonnini and Latreille, 1801 -- valid
  Hydrophis atriceps Günther, 1864 -- valid -- Black-headed Seasnake
  Hydrophis belcheri (Gray, 1849) -- valid -- Faint-banded Seasnake
  Hydrophis bituberculatus W. C. H. Peters, 1873 -- valid -- Peters' Sea Snake
  Hydrophis brookii Günther, 1872 -- valid
  Hydrophis caerulescens (Shaw, 1802) -- valid -- Dwarf Seasnake
  Hydrophis cantoris Günther, 1864 -- valid -- Cantor's Narrow-headed Sea Snake
  Hydrophis coggeri (Kharin, 1984) -- valid -- Slender-necked Seasnake
  Hydrophis cyanocinctus Daudin, 1803 -- valid -- Annulated Sea Snake
  Hydrophis czeblukovi (Kharin, 1984) -- valid -- Fine-spined Seasnake
  Hydrophis elegans (Gray, 1842) -- valid -- Bar-bellied Seasnake, Elegant Seasnake
  Hydrophis fasciatus (Schneider, 1799) -- valid -- Striped Sea Snake
  Hydrophis gracilis (Shaw, 1802) -- valid -- Common Small-headed Sea Snake, Graceful Small-headed Seasnake, Slender Seasnake
  Hydrophis inornatus (Gray, 1849) -- valid -- Inornate Sea Snake, Plain Seasnake
  Hydrophis kingii Boulenger, 1896 -- valid -- King's Seasnake, Spectacled Seasnake
  Hydrophis klossi Boulenger, 1912 -- valid -- Kloss' Sea Snake
  Hydrophis lamberti M. A. Smith, 1917 -- valid -- Lambert's Sea Snake
  Hydrophis lapemoides (Gray, 1849) -- valid -- Persian Gulf Sea Snake
  Hydrophis macdowelli Kharin, 1983 -- valid -- McDowell's Seasnake, Small-headed Seasnake
  Hydrophis major (Shaw, 1802) -- valid -- Greater Seasnake, Olive-headed Seasnake
  Hydrophis mamillaris (Daudin, 1803) -- valid -- Bombay Sea Snake
  Hydrophis melanocephalus Gray, 1849 -- valid -- Slender-necked Seasnake
  Hydrophis melanosoma Günther, 1864 -- valid -- Black-banded Seasnake, Robust Seasnake
  Hydrophis nigrocinctus Daudin, 1803 -- valid -- Black-banded Sea Snake
  Hydrophis obscurus Daudin, 1803 -- valid -- Estuarine Sea Snake, Russel's Sea Snake
  Hydrophis ornatus (Gray, 1842) -- valid -- Ornate Reef Seasnake
  Hydrophis ornatus maresinensis Mittleman, 1947 -- valid
  Hydrophis ornatus ornatus (Gray, 1842) -- valid
  Hydrophis pacificus Boulenger, 1896 -- valid -- Pacific Seasnake
  Hydrophis parviceps M. A. Smith, 1935 -- valid
  Hydrophis semperi Garman, 1881 -- valid -- Lake Taal Snake
  Hydrophis sibauensis Rasmussen, Auliya and Böhme, 2001 -- valid -- Kalimantan Sea Snake
  Hydrophis spiralis (Shaw, 1802) -- valid -- Yellow Sea Snake
  Hydrophis stricticollis Günther, 1864 -- valid -- Collared Sea Snake
  Hydrophis torquatus Günther, 1864 -- valid -- West Coast Black-headed Sea Snake
  Hydrophis torquatus aagaardi M. A. Smith, 1920 -- valid
  Hydrophis torquatus diadema Günther, 1864 -- valid
  Hydrophis torquatus torquatus Günther, 1864 -- valid
  Hydrophis vorisi Kharin, 1984 -- valid -- Estuarine Seasnake
  Hydrophis walli (Kharin, 1989) -- invalid
  Hydrops Wagler, 1830 -- valid
  Hydrops martii (Wagler, 1824) -- valid -- Amazon Water Snake
  Hydrops triangularis (Wagler, 1824) -- valid -- Triangle Water Snake
  Hypoptophis Boulenger, 1896 -- valid
  Hypoptophis wilsoni Boulenger, 1908 -- invalid
  Hypsiglena Cope, 1860 -- valid -- Night Snakes, Nightsnakes
  Hypsiglena nuchalata Tanner, 1943 -- invalid -- California Night Snake
  Hypsiglena ochrorhyncha Cope, 1860 -- invalid
  Hypsiglena ochrorhynchus deserticola Tanner, 1946 -- invalid
  Hypsiglena ochrorhynchus klauberi Tanner, 1946 -- valid -- San Diego Nightsnake
  Hypsiglena ochrorhynchus loreala Tanner, 1946 -- invalid
  Hypsiglena tanzeri Dixon and Lieb, 1972 -- valid -- Rio Verde Nightsnake, Tanzer's Night Snake
  Hypsiglena texana Stejneger, 1893 -- invalid
  Hypsiglena torquata (Günther, 1860) -- valid -- Culebra-nocturna ojo de gato, Night Snake, Nightsnake, Sinaloan Nightsnake
  Hypsiglena torquata deserticola Tanner, 1946 -- invalid
  Hypsiglena torquata klauberi Tanner, 1946 -- invalid
  Hypsiglena torquata loreala Tanner, 1946 -- invalid -- Mesa Verde Night Snake
  Hypsiglena torquata nuchalata Tanner, 1943 -- invalid -- California Nightsnake
  Hypsiglena torquata ochrorhyncha Cope, 1860 -- invalid -- Spotted Night Snake
  Hypsiglena torquata texana Stejneger, 1893 -- invalid
  Hypsirhynchus Günther, 1858 -- valid
  Hypsirhynchus ferox Günther, 1858 -- valid -- Hispaniola Cat-eyed Snake
  Ialtris Cope, 1862 -- valid
  Ialtris agyrtes Schwartz and Rossman, 1976 -- valid -- Barreras Fanged Snake
  Ialtris dorsalis (Günther, 1858) -- valid -- Brown Fanged Snake
  Ialtris parishi Cochran, 1932 -- valid -- Parish's Fanged Snake
  Iguanognathus Boulenger, 1898 -- valid
  Iguanognathus werneri Boulenger, 1898 -- valid -- Spatula-tooth Snake
  Imantodes A. M. C. Duméril, 1853 -- valid
  Imantodes cenchoa (Linnaeus, 1758) -- valid -- Blunt-headed Treesnake, Blunthead Tree Snake, Blunthead Treesnake, Culebra-cordelilla chata, Fiddle-string Snake
  Imantodes gemmistratus (Cope, 1861) -- valid -- Central American Tree Snake, Culebra-cordelilla centroamericana
  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
  Kerilia Gray, 1849 -- invalid
  Kerilia jerdonii Gray, 1849 -- invalid
  Kolpophis M. A. Smith, 1926 -- valid
  Kolpophis annandalei (Laidlaw, 1901) -- valid -- Bighead Sea Snake
  Lampropeltis Fitzinger, 1843 -- valid -- Kingsnakes, Milk Snakes
  Lampropeltis amaura Cope, 1861 -- invalid
  Lampropeltis annulata Kennicott, 1861 -- valid -- Mexican Milk Snake, Mexican Milksnake
  Lampropeltis doliata (Linnaeus, 1766) -- invalid
  Lampropeltis doliata amaura Cope, 1861 -- invalid
  Lampropeltis doliata annulata Kennicott, 1861 -- invalid
  Lampropeltis doliata gentilis (Baird and Girard, 1853) -- invalid
  Lampropeltis doliata syspila (Cope, 1889) -- invalid
  Lampropeltis doliata temporalis Cope, 1893 -- invalid
  Lampropeltis doliata triangulum (Lacépčde, 1789) -- invalid
  Lampropeltis getula sticticeps Barbour and Engels, 1942 -- invalid -- Outer Banks Kingsnake
  Lampropeltis mexicana (Garman, 1884) -- valid -- Culebra-real potosina, Gray-banded Kingsnake, Mexican Kingsnake
  Lampropeltis pyromelana pyromelana (Cope, 1867) -- valid -- Arizona Mountain Kingsnake, Huachuca Mountain Kingsnake
  Lampropeltis triangulum (Lacépčde, 1789) -- valid -- couleuvre tachetée, Culebra-real coralillo, Eastern Milk Snake, Eastern Milksnake
  Lampropeltis triangulum amaura Cope, 1861 -- invalid -- Louisiana Milk Snake
  Lampropeltis triangulum celaenops Stejneger, 1903 -- invalid -- New Mexico Milk Snake
  Lampropeltis triangulum gentilis (Baird and Girard, 1853) -- invalid -- Central Plains Milk Snake
  Lampropeltis triangulum multistriata Kennicott, 1861 -- invalid -- Pale Milk Snake
  Lampropeltis triangulum syspila (Cope, 1889) -- invalid -- Red Milk Snake
  Lampropeltis triangulum taylori Tanner and Loomis, 1957 -- invalid -- Utah Milk Snake
  Lampropeltis triangulum temporalis Cope, 1893 -- invalid
  Lampropeltis triangulum triangulum (Lacépčde, 1789) -- invalid -- Eastern Milk Snake
  Lampropeltis zonata (Lockington ex Blainville, 1876) -- valid -- California Mountain Kingsnake, Culebra-real californiana
  Lampropeltis zonata pulchra Zweifel, 1952 -- invalid -- San Diego Mountain Kingsnake
  Lamprosoma annulatum Baird, 1859 -- invalid
  Lapemis Gray, 1835 -- invalid
  Lapemis curtus (Shaw, 1802) -- invalid
  Lapemis curtus curtus (Shaw, 1802) -- invalid
  Lapemis curtus hardwickii Gray, 1835 -- invalid
  Lapemis hardwickii Gray, 1835 -- invalid
  Laticauda Laurenti, 1768 -- valid -- Sea Kraits, Seakraits
  Laticauda colubrina (Schneider, 1799) -- valid -- Banded Sea Krait, Banded Seakrait, Colubrine Sea Krait, Yellow-lipped Sea Krait
  Laticauda crockeri Slevin, 1934 -- valid -- Crocker's Sea Snake
  Laticauda laticaudata (Linnaeus, 1758) -- valid -- Blue-banded Sea Krait, Blue-lipped Sea Krait, Common Sea Krait
  Laticauda schistorhynchus (Günther, 1874) -- invalid -- Flat-tail Sea Snake
  Laticauda semifasciata (Reinwardt in Schlegel, 1837) -- valid -- Chinese Sea Snake
  Leimadophis flavilatus (Cope, 1871) -- invalid
  Leptodeira Fitzinger, 1843 -- valid -- Cat-eyed Snakes
  Leptodeira annulata (Linnaeus, 1758) -- valid -- Banded Cat-eyed Snake, Culebra-ojo de gato bandada
  Leptodeira annulata septentrionalis (Kennicott in Baird, 1859) -- 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 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 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 norteńa o manchada, Northern Cat-eyed Snake
  Leptodeira splendida Günther, 1895 -- valid -- Culebra-ojo de gato espléndida, Splendid Cat-eyed Snake
  Leptomicrurus K. P. Schmidt, 1937 -- invalid
  Leptomicrurus collaris (Schlegel, 1837) -- invalid
  Leptomicrurus collaris breviventris Roze and Bernal-Carlo, 1987 -- invalid
  Leptomicrurus collaris collaris (Schlegel, 1837) -- invalid
  Leptomicrurus narduccii (Jan, 1863) -- invalid
  Leptomicrurus narduccii melanotus (W. C. H. Peters, 1881) -- invalid
  Leptomicrurus narduccii narduccii (Jan, 1863) -- invalid
  Leptomicrurus scutiventris (Cope, 1870) -- invalid
  Leptophis Bell, 1825 -- valid
  Leptophis ahaetulla (Linnaeus, 1758) -- valid -- Culebra-perico verde, Giant Parrot Snake, Parrot Snake
  Leptophis taeniata Hallowell, 1852 -- invalid
  Limnophis Günther, 1865 -- valid
  Limnophis bicolor Günther, 1865 -- valid -- Bicolored Swamp Snake
  Liochlorophis Oldham and H. M. Smith, 1991 -- invalid -- Smooth Green Snakes
  Liochlorophis vernalis (Harlan, 1827) -- invalid -- Smooth Green Snake
  Lioheterophis Amaral, 1935 -- valid
  Lioheterophis iheringi Amaral, 1935 -- valid -- Ihering's Snake
  Liophis Wagler, 1830 -- invalid
  Liophis almadensis (Wagler, 1824) -- invalid
  Liophis amarali Wettstein, 1930 -- invalid
  Liophis andinus Dixon, 1983 -- invalid
  Liophis anomalus (Günther, 1858) -- invalid
  Liophis atraventer Dixon and Thomas, 1985 -- invalid
  Liophis breviceps Cope, 1860 -- invalid
  Liophis carajasensis da Cunha, Nascimento and Avila-Pires, 1985 -- invalid
  Liophis ceii Dixon, 1991 -- invalid
  Liophis cobella (Linnaeus, 1758) -- invalid
  Liophis cursor (Lacépčde, 1789) -- invalid
  Liophis dilepis (Cope, 1862) -- invalid
  Liophis elegantissimus (Koslowsky, 1896) -- invalid
  Liophis epinephelus Cope, 1862 -- invalid
  Liophis festae (Peracca, 1897) -- invalid
  Liophis flavifrenatus (Cope, 1862) -- invalid
  Liophis frenata (Werner, 1909) -- invalid
  Liophis guentheri Perraca, 1897 -- invalid
  Liophis jaegeri (Günther, 1858) -- invalid
  Liophis joberti (Sauvage, 1884) -- invalid
  Liophis juliae (Cope, 1879) -- invalid
  Liophis leucogaster Jan, 1863 -- invalid
  Liophis lineatus (Linnaeus, 1758) -- invalid
  Liophis longiventris Amaral, 1925 -- invalid
  Liophis maryellenae Dixon, 1985 -- invalid
  Liophis melanauchen (Jan, 1863) -- invalid
  Liophis melanotus (Shaw, 1802) -- invalid -- Shaw's Black-backed Snake
  Liophis meridionalis (Schenkel, 1901) -- invalid
  Liophis miliaris (Linnaeus, 1758) -- invalid
  Liophis obtusus (Cope, 1864) -- invalid
  Liophis oligolepis Boulenger, 1905 -- invalid
  Liophis ornatus (Garman, 1887) -- invalid
  Liophis paucidens (Hoge, 1953) -- invalid
  Liophis perfuscus Cope, 1863 -- invalid
  Liophis poecilogyrus (Wied-Neuwied, 1825) -- invalid
  Liophis reginae (Linnaeus, 1758) -- invalid
  Liophis reginae reginae (Linnaeus, 1758) -- invalid
  Liophis sagittifer Jan, 1863 -- invalid
  Liophis steinbachi (Boulenger, 1905) -- invalid
  Liophis subocularis (Boulenger, 1902) -- invalid
  Liophis taeniurus (Tschudi, 1845) -- invalid
  Liophis triscalis (Linnaeus, 1758) -- invalid
  Liophis typhlus (Linnaeus, 1758) -- invalid
  Liophis vanzolinii Dixon, 1985 -- invalid
  Liophis viridis Günther, 1862 -- invalid
  Loveridgelaps McDowell, 1970 -- valid
  Loveridgelaps elapoides (Boulenger, 1890) -- valid -- Solomon's Small-eyed Snake
  Lycognathophis Boulenger, 1893 -- valid
  Lycognathophis seychellensis (Schlegel, 1837) -- valid
  Lystrophis Cope, 1885 -- invalid
  Lystrophis dorbignyi (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Lystrophis histricus (Jan, 1863) -- invalid
  Lystrophis nattereri (Steindachner, 1867) -- invalid
  Lystrophis semicinctus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Macrelaps Boulenger, 1896 -- valid
  Macrelaps microlepidotus (Günther, 1860) -- valid -- Natal Black Snake
  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 rhodomelas (H. Boie in F. Boie, 1827) -- valid -- Blueneck Keelback
  Macropisthodon rudis Boulenger, 1906 -- valid -- False Habu, Red Keelback
  Manolepis Cope, 1885 -- valid
  Manolepis putnami (Jan, 1863) -- valid -- Culebra cabeza surcada, Ridgehead Snake
  Masticophis bilineatus lineolatus Hensley, 1950 -- invalid -- Ajo Mountain Whipsnake
  Masticophis ruthveni Ortenburger, 1923 -- invalid
  Masticophis taeniatus girardi (Stejneger and Barbour, 1917) -- invalid -- Central Texas Whipsnake
  Masticophis taeniatus ruthveni Ortenburger, 1923 -- invalid
  Masticophis taeniatus schotti Baird and Girard, 1853 -- invalid
  Masticophis taeniatus taeniatus (Hallowell, 1852) -- invalid -- Desert Striped Whipsnake
  Micrelaps Boettger, 1880 -- valid
  Micrelaps bicoloratus Sternfeld, 1908 -- valid -- Kenya Two-headed Snake
  Micrelaps bicoloratus bicoloratus Sternfeld, 1908 -- valid
  Micrelaps bicoloratus moyeri Rasmussen, 2002 -- valid
  Micrelaps boettgeri Boulenger, 1896 -- invalid
  Micrelaps muelleri Boettger, 1880 -- valid
  Micrelaps vaillanti (Mocquard, 1888) -- valid -- Black-headed Micrelaps, Somali Two-headed Snake
  Micropechis Boulenger, 1896 -- valid
  Micropechis ikaheka (Lesson in Duperrey, 1829) -- invalid
  Microps lineatus Hallowell, 1856 -- invalid
  Micruroides K. P. Schmidt, 1928 -- valid -- Sonoran Coralsnakes, Western Coral Snakes
  Micruroides euryxanthus (Kennicott, 1860) -- valid -- Serpiente-coralillo sonorense, Sonoran Coralsnake, Western Coral Snake
  Micruroides euryxanthus australis Zweifel and Norris, 1955 -- valid
  Micruroides euryxanthus euryxanthus (Kennicott, 1860) -- valid -- Arizona Coral Snake
  Micruroides euryxanthus neglectus Roze, 1967 -- valid
  Micrurus Wagler, 1824 -- valid -- American Coral Snakes, American Coralsnakes
  Micrurus albicinctus Amaral, 1925 -- valid -- White-banded Coral Snake
  Micrurus alleni K. P. Schmidt, 1936 -- valid -- Allen's Coral Snake
  Micrurus altirostris (Cope, 1860) -- valid
  Micrurus ancoralis (Jan in Jan and Sordelli, 1872) -- valid -- Regal Coral Snake
  Micrurus annellatus (W. C. H. Peters, 1871) -- valid -- Annellated Coral Snake
  Micrurus annellatus annellatus (W. C. H. Peters, 1871) -- valid
  Micrurus annellatus balzani (Boulenger, 1898) -- valid
  Micrurus annellatus bolivianus Roze, 1967 -- valid
  Micrurus averyi K. P. Schmidt, 1939 -- valid -- Black-headed Coral Snake
  Micrurus bernadi (Cope, 1887) -- valid -- Blotched Coral Snake, Saddled Coral Snake
  Micrurus bocourti (Jan in Jan and Sordelli, 1872) -- valid -- Ecuador Coral Snake, False Triad Coral Snake
  Micrurus bogerti Roze, 1967 -- valid -- Bogert's Coral Snake, Serpiente-coralillo de Bogert
  Micrurus browni K. P. Schmidt and H. M. Smith, 1943 -- valid -- Brown's Coral Snake, Serpiente-coralillo de Brown
  Micrurus browni browni K. P. Schmidt and H. M. Smith, 1943 -- valid
  Micrurus browni importunus Roze, 1967 -- valid
  Micrurus browni taylori K. P. Schmidt and H. M. Smith, 1943 -- valid
  Micrurus camilae Renjifo and Lundberg, 2003 -- valid
  Micrurus catamayensis Roze, 1989 -- valid -- Catamayo Coral Snake
  Micrurus circinalis (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Trinidad Northern Coral Snake
  Micrurus clarki K. P. Schmidt, 1936 -- valid -- Clark's Coral Snake
  Micrurus corallinus (Merrem, 1820) -- valid -- Painted Coral Snake
  Micrurus decoratus (Jan, 1858) -- valid -- Brazilian Coral Snake
  Micrurus diana Roze, 1983 -- valid -- Diana's Coral Snake
  Micrurus diastema (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Diastema Coral Snake, Serpiente-coralillo variable, Variable Coral Snake
  Micrurus diastema affinis (Jan, 1858) -- valid
  Micrurus diastema aglaeope (Cope, 1860) -- valid
  Micrurus diastema alienus (Werner, 1903) -- valid
  Micrurus diastema apiatus (Jan, 1858) -- valid
  Micrurus diastema diastema (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Micrurus diastema macdougalli Roze, 1967 -- valid
  Micrurus diastema sapperi (Werner, 1903) -- valid
  Micrurus dissoleucus (Cope, 1860) -- valid -- Pigmy Coral Snake
  Micrurus dissoleucus dissoleucus (Cope, 1860) -- valid
  Micrurus dissoleucus dunni Barbour, 1923 -- valid
  Micrurus dissoleucus melanogenys (Cope, 1860) -- valid
  Micrurus dissoleucus nigrirostris K. P. Schmidt, 1955 -- valid
  Micrurus distans (Kennicott, 1860) -- valid -- Serpiente-coralillo del oeste mexicano, West Mexican Coral Snake
  Micrurus distans distans (Kennicott, 1860) -- valid
  Micrurus distans michoacanensis (Dugčs, 1891) -- valid
  Micrurus distans oliveri Roze, 1967 -- valid
  Micrurus distans zweifeli Roze, 1967 -- valid
  Micrurus dumerilii (Jan, 1858) -- valid
  Micrurus dumerilii antioquiensis K. P. Schmidt, 1936 -- valid
  Micrurus dumerilii carinicauda K. P. Schmidt, 1936 -- valid
  Micrurus dumerilii colombianus (Griffin, 1916) -- valid
  Micrurus dumerilii dumerilii (Jan, 1858) -- valid
  Micrurus dumerilii transandinus K. P. Schmidt, 1936 -- valid
  Micrurus dumerilii venezuelensis Roze, 1989 -- valid
  Micrurus elegans (Jan, 1858) -- valid -- Elegant Coral Snake, Serpiente-coralillo elegante
  Micrurus elegans elegans (Jan, 1858) -- valid
  Micrurus elegans veraepacis K. P. Schmidt, 1933 -- valid
  Micrurus ephippifer (Cope, 1886) -- valid -- Oaxacan Coral Snake, Serpiente-coralillo oaxaqueńa
  Micrurus ephippifer ephippifer (Cope, 1886) -- valid
  Micrurus ephippifer zapotectus Roze, 1989 -- valid
  Micrurus filiformis (Günther, 1859) -- valid -- Slender Coral Snake
  Micrurus frontalis (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Southern Coral Snake
  Micrurus frontalis balicoryphus (Cope, 1860) -- invalid
  Micrurus frontalis brasiliensis Roze, 1967 -- invalid
  Micrurus frontalis frontalis (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Micrurus frontalis multicinctus Amaral, 1944 -- invalid
  Micrurus frontifasciatus (Werner, 1927) -- invalid
  Micrurus fulvius (Linnaeus, 1766) -- valid -- Eastern Coral Snake, Harlequin Coralsnake, Northern Coral Snake, Serpiente-coralillo arlequín
  Micrurus fulvius fulvius (Linnaeus, 1766) -- invalid -- Eastern Coral Snake
  Micrurus fulvius tener (Baird and Girard, 1853) -- invalid -- Texas Coral Snake
  Micrurus hemprichii (Jan, 1858) -- valid -- Hemprich's Coral Snake
  Micrurus hemprichii hemprichii (Jan, 1858) -- valid
  Micrurus hemprichii ortoni K. P. Schmidt, 1953 -- valid
  Micrurus hemprichii rondonianus Roze and Da Silva, 1990 -- invalid
  Micrurus hippocrepis (W. C. H. Peters, 1862) -- valid -- Mayan Coral Snake
  Micrurus ibiboboca (Merrem, 1820) -- valid -- Caatinga Coral Snake
  Micrurus isozonus (Cope, 1860) -- valid -- Venezuela Coral Snake
  Micrurus langsdorffi (Wagler, 1824) -- valid -- Langsdorff's Coral Snake
  Micrurus laticollaris (W. C. H. Peters, 1870) -- valid -- Balsas Coral Snake, Serpiente-coralillo del Balsas
  Micrurus laticollaris laticollaris (W. C. H. Peters, 1870) -- valid
  Micrurus laticollaris maculirostris Roze, 1967 -- valid
  Micrurus latifasciatus K. P. Schmidt, 1933 -- valid -- Broad-ringed Coral Snake, Serpiente-coralillo franjas anchas
  Micrurus lemniscatus (Linnaeus, 1758) -- valid -- South American Coral Snake
  Micrurus lemniscatus carvalhoi Roze, 1967 -- valid
  Micrurus lemniscatus diutius Burger, 1955 -- valid
  Micrurus lemniscatus helleri K. P. Schmidt and F. J. W. Schmidt, 1925 -- valid
  Micrurus lemniscatus lemniscatus (Linnaeus, 1758) -- valid
  Micrurus limbatus Fraser, 1964 -- valid -- Serpiente-coralillo de Los Tuxtlas, Tuxtlan Coral Snake
  Micrurus limbatus limbatus Fraser, 1964 -- valid
  Micrurus limbatus spilosomus Pérez-Higareda and H. M. Smith, 1990 -- valid
  Micrurus margaritifer Roze, 1967 -- valid -- Speckled Coral Snake
  Micrurus margaritiferus Roze, 1967 -- invalid -- Speckled Coral Snake
  Micrurus medemi Roze, 1967 -- valid
  Micrurus meridensis Roze, 1989 -- valid -- Merida Coral Snake
  Micrurus mertensi K. P. Schmidt, 1936 -- valid -- Mertens' Coral Snake
  Micrurus mipartitus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Redtail Coral Snake
  Micrurus mipartitus anomalus (Boulenger, 1896) -- valid
  Micrurus mipartitus decussatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Micrurus mipartitus miparititus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Micrurus mipartitus mipartitus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid
  Micrurus mipartitus popayensis Ayerbe, M. A. Tidwell and M. Tidwell, 1990 -- valid
  Micrurus mipartitus semiparititus (Jan, 1858) -- invalid
  Micrurus multifasciatus (Jan, 1858) -- valid -- Many-banded Coral Snake
  Micrurus multifasciatus hertwigi (Werner, 1896) -- valid
  Micrurus multifasciatus multifasciatus (Jan, 1858) -- valid
  Micrurus multiscutatus Rendahl and Vestergreen, 1940 -- valid -- Cauca Coral Snake
  Micrurus nebularis Roze, 1989 -- valid -- Cloud Forest Coral Snake, Serpiente-coralillo de niebla
  Micrurus nigrocinctus (Girard, 1854) -- valid -- Central American Coral Snake, Serpiente-coralillo centroamericana
  Micrurus nigrocinctus babaspul Roze, 1967 -- valid
  Micrurus nigrocinctus coibensis K. P. Schmidt, 1936 -- valid
  Micrurus nigrocinctus divaricatus (Hallowell, 1855) -- valid
  Micrurus nigrocinctus mosquitensis K. P. Schmidt, 1933 -- invalid
  Micrurus nigrocinctus nigrocinctus (Girard, 1854) -- valid
  Micrurus nigrocinctus zunilensis K. P. Schmidt, 1932 -- valid
  Micrurus oligoanellatus Ayerbe González and López López, 2002 -- valid -- Tambito's Coral Snake
  Micrurus ornatissimus (Jan, 1858) -- valid -- Ornate Coralsnake
  Micrurus pacaraimae Morato de Carvalho, 2002 -- valid
  Micrurus pachecogili Campbell, 2000 -- valid
  Micrurus paraensis Cunha and Nascimento, 1973 -- valid
  Micrurus peruvianus K. P. Schmidt, 1936 -- valid -- Peru Coral Snake
  Micrurus petersi Roze, 1967 -- valid -- Peters' Coral Snake
  Micrurus proximans H. M. Smith and Chrapliwy, 1958 -- valid -- Nayarit Coral Snake, Serpiente-coralillo nayarita
  Micrurus psyches (Daudin, 1803) -- valid -- Carib Coral Snake
  Micrurus putumayensis Lancini, 1962 -- valid -- Putumayo Coral Snake
  Micrurus pyrrhocryptus (Cope, 1862) -- valid
  Micrurus pyrrhocryptus pyrrhocryptus (Cope, 1862) -- invalid
  Micrurus pyrrhocryptus tricolor Hoge, 1956 -- invalid
  Micrurus remotus Roze, 1987 -- valid
  Micrurus ruatanus (Günther, 1895) -- valid -- Roatan Coral Snake
  Micrurus sangilensis Nicéforo-María, 1942 -- valid -- Santander Coral Snake
  Micrurus serranus Harvey, Aparicio and González, 2003 -- valid
  Micrurus spixii Wagler, 1824 -- valid -- Amazon Coral Snake
  Micrurus spixii martiusi K. P. Schmidt, 1953 -- valid
  Micrurus spixii obscurus (Jan in Jan and Sordelli, 1872) -- invalid
  Micrurus spixii princeps (Boulenger, 1905) -- invalid
  Micrurus spixii spixii Wagler, 1824 -- valid
  Micrurus spurelli (Boulenger, 1914) -- invalid
  Micrurus steindachneri (Werner, 1901) -- valid -- Steindachner's Coral Snake
  Micrurus steindachneri orcesi Roze, 1967 -- valid
  Micrurus steindachneri steindachneri (Werner, 1901) -- valid
  Micrurus stewarti Barbour and Amaral, 1928 -- valid -- Panamenian Coral Snake
  Micrurus stuarti Roze, 1967 -- valid -- Stuart's Coral Snake
  Micrurus surinamensis (Cuvier, 1817) -- valid -- Aquatic Coral Snake
  Micrurus surinamensis nattereri K. P. Schmidt, 1952 -- invalid
  Micrurus surinamensis surinamensis (Cuvier, 1817) -- invalid
  Micrurus tamaulipensis Lavin-Murcio and Dixon, 2004 -- invalid
  Micrurus tener (Baird and Girard, 1853) -- valid -- Texas Coral Snake, Texas Coralsnake
  Micrurus tener fitzingeri (Jan, 1858) -- valid
  Micrurus tener maculatus Roze, 1967 -- valid
  Micrurus tener microgalbieneus Brown and H. M. Smith, 1942 -- valid
  Micrurus tener tener (Baird and Girard, 1853) -- valid
  Micrurus tschudii (Jan, 1858) -- valid -- Desert Coral Snake
  Micrurus tschudii olssoni K. P. Schmidt and F. J. W. Schmidt, 1925 -- valid
  Micrurus tschudii tschudii (Jan, 1858) -- valid
  Myron Gray, 1849 -- valid
  Myron richardsonii Gray, 1849 -- valid -- Richardson's Mangrove Snake
  Naja Laurenti, 1768 -- valid
  Naja annulifera W. C. H. Peters, 1854 -- valid -- Banded Cobra, Snouted Cobra
  Naja annulifera anchietae Bocage, 1879 -- invalid
  Naja annulifera annulifera W. C. H. Peters, 1854 -- invalid
  Naja atra Cantor, 1842 -- valid -- Chinese Cobra
  Naja haje (Linnaeus, 1758) -- valid -- Egyptian Cobra
  Naja haje arabica Scortecci, 1932 -- invalid
  Naja haje haje (Linnaeus, 1758) -- invalid
  Naja haje legionis Valverde, 1989 -- invalid
  Naja kaouthia Lesson in Ferussac, 1831 -- valid -- Monocellate Cibra, Monocled Cobra
  Naja katiensis Angel, 1922 -- valid -- Katian Spitting Cobra, Mali Cobra
  Naja mandalayensis Slowinski and Wüster, 2000 -- valid
  Naja melanoleuca Hallowell, 1857 -- valid -- Black and White Cobra, Forest Cobra
  Naja mossambica W. C. H. Peters, 1854 -- valid -- Mozambique Spitting Cobra
  Naja naja (Linnaeus, 1758) -- valid -- Indian Cobra
  Naja nigricollis Reinhardt, 1843 -- valid -- Black-necked Spitting Cobra
  Naja nigricollis nigricincta Bogert, 1940 -- invalid
  Naja nigricollis nigricollis Reinhardt, 1843 -- invalid
  Naja nigricollis woodi Pringle, 1955 -- invalid
  Naja nivea (Linnaeus, 1758) -- valid -- Cape Cobra
  Naja nubiae Wüster and Broadly, 2003 -- valid -- Nubian Spitting Cobra
  Naja oxiana (Eichwald, 1831) -- valid -- Central Asian Cobra
  Naja pallida Boulenger, 1896 -- valid -- African Cobra, Red Spitting Cobra
  Naja philippinensis Taylor, 1922 -- valid -- Philippine Cobra
  Naja sagittifera Wall, 1913 -- valid -- Andaman Cobra
  Naja samarensis W. C. H. Peters, 1861 -- valid -- Peters' Cobra
  Naja siamensis Laurenti, 1768 -- valid -- Indo-Chinese Spitting Cobra
  Naja sputatrix F. Boie, 1827 -- valid -- Indonesian Cobra
  Naja sumatrana F. Müller, 1887 -- valid -- Equatorial Spitting Cobra, Golden Spitting Cobra
  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 sylvatica Broadly, 1966 -- valid -- Forest Marsh Snake
  Natriciteres variegata (Peters, 1861) -- valid -- Variable Marsh Snake
  Natrix Laurenti, 1768 -- valid
  Natrix compressicauda (Kennicott, 1860) -- invalid
  Natrix compressicauda bivittata Cope, 1889 -- invalid
  Natrix compressicauda obscura Lönnberg, 1894 -- invalid
  Natrix compressicauda taeniata Cope, 1895 -- invalid
  Natrix compressicauda walkeri Yarrow, 1883 -- invalid
  Natrix cyclopion floridana Goff, 1936 -- invalid
  Natrix erythrogaster (Forster in Bossu, 1771) -- invalid
  Natrix erythrogaster erythrogaster (Forster in Bossu, 1771) -- invalid
  Natrix erythrogaster flavigaster Conant, 1949 -- invalid
  Natrix erythrogaster neglecta Conant, 1949 -- invalid
  Natrix erythrogaster transversa (Hallowell, 1852) -- invalid
  Natrix fasciata confluens Blanchard, 1923 -- invalid
  Natrix fasciata pictiventris Cope, 1895 -- invalid
  Natrix fasciata pleuralis Cope, 1892 -- invalid
  Natrix grahamii (Baird and Girard, 1853) -- invalid
  Natrix harteri Trapido, 1941 -- invalid
  Natrix harteri paucimaculata Tinkle and Conant, 1961 -- invalid
  Natrix kirtlandii (Kennicott, 1856) -- invalid
  Natrix maura (Linnaeus, 1758) -- valid -- Viperine Water Snake
  Natrix megalocephala Orlov and Tuniyev, 1987 -- invalid
  Natrix natrix (Linnaeus, 1758) -- valid -- European Grass Snake
  Natrix rhombifer (Hallowell, 1852) -- invalid
  Natrix rhombifer rhombifer (Hallowell, 1852) -- invalid
  Natrix rigida (Say, 1825) -- invalid
  Natrix septemvittata (Say, 1825) -- invalid
  Natrix sipedon (Linnaeus, 1758) -- invalid
  Natrix sipedon compressicauda (Kennicott, 1860) -- invalid
  Natrix sipedon fasciata (Linnaeus, 1766) -- invalid
  Natrix sipedon insularum Conant and Clay, 1937 -- invalid
  Natrix sipedon pictiventris Cope, 1895 -- invalid
  Natrix sipedon pleuralis Cope, 1892 -- invalid
  Natrix sipedon sipedon (Linnaeus, 1758) -- invalid
  Natrix sipedon taeniata Cope, 1895 -- invalid
  Natrix sipedon williamengelsi Conant and Lazell, 1973 -- invalid
  Natrix taxispilota (Holbrook, 1838) -- invalid
  Natrix tessellata (Laurenti, 1768) -- valid -- Dice Snake
  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 erythrogaster alta (Conant, 1963) -- invalid
  Nerodia erythrogaster bogerti (Conant, 1953) -- invalid
  Nerodia erythrogaster erythrogaster (Forster in Bossu, 1771) -- invalid -- Red-bellied Water Snake, Redbelly Water Snake
  Nerodia erythrogaster flavigaster (Conant, 1949) -- invalid -- Yellow-bellied Water Snake
  Nerodia erythrogaster neglecta (Conant, 1949) -- invalid -- Copperbelly Water Snake
  Nerodia erythrogaster transversa (Hallowell, 1852) -- invalid -- Blotched Water Snake
  Nerodia fasciata (Linnaeus, 1766) -- valid -- Southern Water Snake
  Nerodia fasciata confluens (Blanchard, 1923) -- valid -- Broad-banded Water Snake
  Nerodia fasciata pictiventris (Cope, 1895) -- valid -- Florida Water Snake
  Nerodia fasciata taeniata (Cope, 1895) -- invalid
  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 harteri harteri (Trapido, 1941) -- invalid -- Brazos River Watersnake, Brazos water snake
  Nerodia harteri paucimaculata (Tinkle and Conant, 1961) -- invalid
  Nerodia melanogaster (Peters, 1864) -- invalid -- Culebra-de agua vientre negro
  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 rhombifera (Hallowell, 1852) -- invalid
  Nerodia rhombifera rhombifera (Hallowell, 1852) -- invalid
  Nerodia rufipunctatus (Cope, 1875) -- invalid -- Culebra-de agua cabeza angosta
  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 Baird and Girard, 1853 -- valid
  Ninia atrata (Hallowell, 1845) -- valid -- Hallowell's Coffee Snake, South American Coffee Snake
  Ninia cerroensis Taylor, 1954 -- invalid
  Ninia diademata Baird and Girard, 1853 -- valid -- Culebra-de cafetal de collar, Veracruz Ringneck Coffee Snake
  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 oxynota (Werner, 1910) -- invalid
  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
  Notechis Boulenger, 1896 -- valid
  Notechis ater (Krefft, 1866) -- invalid
  Notechis scutatus (W. C. H. Peters, 1861) -- valid -- Mainland Tiger Snake
  Nothopsis Cope, 1871 -- valid
  Nothopsis rugosus Cope, 1871 -- valid -- Rough Coffee Snake
  Ogmodon W. C. H. Peters, 1864 -- valid
  Ogmodon vitianus W. C. H. Peters, 1864 -- valid -- Bola, Fiji Cobra, Fijian Ground Snake
  Oligodon sauteri Steindachner, 1913 -- invalid
  Opheodrys vernalis (Harlan, 1827) -- valid -- Culebra-verde lisa, Smooth Green Snake, Smooth Greensnake
  Ophibolus gentilis Baird and Girard, 1853 -- invalid
  Ophibolus getulus multicinctus Yarrow, 1882 -- invalid
  Ophibolus pyromelanus Cope, 1867 -- invalid
  Ophiophagus Günther, 1864 -- valid
  Ophiophagus hannah (Cantor, 1836) -- valid -- Hamadryad, King Cobra
  Opisthoplus Peters, 1883 -- invalid
  Opisthoplus degener Peters, 1883 -- invalid
  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 annamensis (Bourret, 1934) -- invalid
  Opisthotropis ater Günther, 1872 -- invalid
  Opisthotropis atra Günther, 1872 -- valid
  Opisthotropis balteata (Cope, 1895) -- valid -- Hainan Mountain Keelback
  Opisthotropis balteatus (Cope, 1895) -- invalid
  Opisthotropis boonsongi (Taylor and Elbel, 1958) -- invalid
  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 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 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 praemaxillaris (Angel, 1929) -- invalid
  Opisthotropis rugosa (Lidth de Jeude, 1890) -- valid
  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
  Oxybelis Wagler, 1830 -- valid -- Vine Snakes, Vinesnakes
  Oxybelis aeneus (Wagler, 1824) -- valid -- Brown Vine Snake, Brown Vinesnake, Culebra-bejuquilla mexicana, Mexican Vine Snake
  Oxybelis argenteus (Daudin, 1803) -- invalid
  Oxybelis boulengeri Procter, 1923 -- invalid
  Oxybelis brevirostris (Cope, 1861) -- valid -- Cope's Vine Snake
  Oxybelis fulgidus (Daudin, 1803) -- valid -- Culebra-bejuquilla verde
  Oxyrhabdium Boulenger, 1893 -- valid
  Oxyrhabdium leporinum (Günther, 1858) -- valid -- Günther's Philippine Shrub Snake
  Oxyrhabdium modestum (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Philippine Shrub Snake
  Oxyrhopus Wagler, 1830 -- 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 fitzingeri (Tschudi, 1845) -- valid -- Fitzinger's False Coral Snake
  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 occipitalis (Wied-Neuwied, 1824) -- valid
  Oxyrhopus petola (Linnaeus, 1758) -- invalid -- Calico Snake, Culebra-encendida de Cálico
  Oxyrhopus petola petola (Linnaeus, 1758) -- invalid -- Calico Snake
  Oxyrhopus rhombifer A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Amazon False Coral Snake
  Oxyrhopus trigeminus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Brazilian False Coral Snake
  Oxyrhopus venezuelanus Shreve, 1947 -- invalid
  Oxyuranus Kinghorn, 1923 -- valid
  Oxyuranus microlepidotus (McCoy, 1879) -- valid -- Fierce Snake, Inland Taipan
  Oxyuranus scutellatus (W. C. H. Peters, 1867) -- valid -- Coastal Taipan, New Guinea Taipan
  Oxyuranus scutellatus canni Slater, 1956 -- valid -- Papuan Taipan
  Oxyuranus scutellatus scutellatus (W. C. H. Peters, 1867) -- valid -- Coastal Taipan, New Guinea Taipan
  Parahydrophis Burger and Natsuno, 1974 -- valid
  Parahydrophis mertoni (Roux, 1910) -- valid -- Arafura Smooth Seasnake, Northern Mangrove Seasnake
  Paranaja Loveridge, 1944 -- invalid
  Paranaja multifasciata (Werner, 1902) -- invalid
  Paranaja multifasciata anomala (Sternfeld, 1917) -- invalid
  Paranaja multifasciata dulloni (Boulenger, 1904) -- invalid
  Paranaja multifasciata multifasciata (Werner, 1902) -- invalid
  Parapistoclamus Roux, 1934 -- invalid
  Parapistoclamus hedigeri Roux, 1934 -- invalid
  Parapostolepis Amaral, 1930 -- invalid
  Parapostolepis polylepis (Amaral, 1921) -- invalid
  Pararhabdophis Bourret, 1934 -- valid
  Pararhabdophis chapaensis Bourret, 1934 -- valid -- Vietnam Water Snake
  Pelamis Daudin, 1803 -- invalid -- Yellow-bellied Sea Snakes, Yellow-bellied Seasnakes
  Pelamis platurus (Linnaeus, 1766) -- invalid -- Serpiente-marina pelágica, Yellow-bellied Sea Snake, Yellow-bellied Seasnake
  Philodryas Wagler, 1830 -- valid -- Green Snakes
  Philodryas aestiva (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Brazilian Green Racer
  Philodryas aestivus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Philodryas arnoldoi (Amaral, 1932) -- invalid
  Philodryas baroni Berg, 1895 -- valid -- Baron's Green Racer
  Philodryas boliviana Boulenger, 1896 -- valid -- Bolivian Racer
  Philodryas bolivianus Boulenger, 1896 -- invalid
  Philodryas burmeisteri Jan, 1863 -- invalid
  Philodryas carbonelli Roze, 1957 -- invalid
  Philodryas chamissonis (Wiegmann, 1835) -- valid -- Chilean Green Racer
  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 oligolepis Gomes, 1921 -- invalid
  Philodryas patagoniensis (Girard, 1858) -- valid -- Patagonia Green Racer
  Philodryas psammophidea Günther, 1872 -- valid -- Günther's Green Racer
  Philodryas psammophideus Günther, 1872 -- invalid
  Philodryas simonsi Boulenger, 1900 -- invalid
  Philodryas tachymenoides (Schmidt and Walker, 1943) -- valid -- Schmidt's Green Racer
  Philodryas varia (Peracca, 1897) -- invalid
  Philodryas varius (Peracca, 1897) -- invalid
  Philodryas viridissima (Linnaeus, 1758) -- valid -- Common Green Racer
  Philodryas viridissimus (Linnaeus, 1758) -- invalid
  Phimophis Cope, 1860 -- valid
  Phimophis chui Rodrigues, 1993 -- invalid
  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 iglesiasi (Gomes, 1915) -- invalid
  Phimophis scriptorcibatus Rodrigues, 1993 -- invalid
  Phimophis vittatus (Boulenger, 1896) -- valid -- Banded Pampas Snake
  Phimothyra decurtata Cope, 1868 -- invalid
  Phimothyra hexalepis Cope, 1867 -- invalid
  Phyllorhynchus Stejneger, 1890 -- valid -- Leaf-nosed Snakes
  Phyllorhynchus browni lucidus Klauber, 1940 -- invalid -- Maricopa Leafnose Snake
  Phyllorhynchus decurtatus nubilis Klauber, 1940 -- invalid -- Clouded Leafnose Snake
  Phyllorhynchus decurtatus perkinsi Klauber, 1935 -- invalid -- Western Leaf-nosed Snake
  Pituophis affinis Hallowell, 1852 -- invalid
  Pituophis annectens Baird and Girard, 1853 -- invalid
  Pituophis catenifer catenifer (Blainville, 1835) -- valid -- Pacific Gopher Snake
  Pituophis catenifer deserticola Stejneger, 1893 -- valid -- Great Basin Gopher Snake
  Pituophis catenifer pumilis Klauber, 1946 -- valid -- Santa Cruz Gopher Snake
  Pituophis lodingi Blanchard, 1924 -- invalid
  Pituophis melanoleucus annectens Baird and Girard, 1853 -- invalid
  Pituophis melanoleucus catenifer (Blainville, 1835) -- invalid
  Pituophis melanoleucus sayi (Schlegel, 1837) -- invalid
  Pituophis sayi (Schlegel, 1837) -- invalid
  Pityophis intermedius Boettger, 1883 -- invalid
  Platyinion Amaral, 1923 -- invalid
  Platyinion lividum Amaral, 1923 -- invalid
  Poecilopholis Boulenger, 1903 -- valid
  Poecilopholis cameronensis Boulenger, 1903 -- valid -- Cameroon Racer
  Polemon Jan, 1858 -- valid
  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 gracilis (de Witte and Laurent, 1943) -- invalid
  Polemon fulvicollis graveri (Sternfeld, 1908) -- invalid
  Polemon fulvicollis laurenti (de Witte and Laurent, 1943) -- invalid
  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 newiedi (Jan, 1858) -- invalid
  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
  Praescutata Wall, 1921 -- invalid
  Praescutata viperina (P. Schmidt, 1852) -- invalid
  Psammophis seychellensis Schlegel, 1837 -- invalid
  Pseudablabes Boulenger, 1896 -- invalid
  Pseudablabes agassizii (Jan, 1863) -- invalid
  Pseudechis Wagler, 1830 -- valid
  Pseudechis australis (Gray, 1842) -- valid -- King Brown, Mulga Snake
  Pseudechis butleri L. A. Smith, 1982 -- valid -- Butler's Snake, Spotted Mulga Snake
  Pseudechis colletti Boulenger, 1902 -- valid -- Collett's Snake
  Pseudechis guttatus De Vis, 1905 -- valid -- Blue-bellied Black Snake, Spotted Black Snake
  Pseudechis pailsei (Hoser, 1998) -- valid -- False King Brown Snake
  Pseudechis papuanus W. C. H. Peters and Doria, 1878 -- valid -- Papuan Blacksnake
  Pseudechis porphyriacus (Shaw, 1794) -- valid -- Australian Black Snake, Red-bellied Black Snake
  Pseudoboa Schneider, 1801 -- valid
  Pseudoboa coronata Schneider, 1801 -- valid -- Crowned False Boa
  Pseudoboa haasi (Boettger, 1905) -- valid -- Paraná False Boa
  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
  Pseudoeryx Fitzinger, 1826 -- valid
  Pseudoeryx plicatilis (Linnaeus, 1758) -- valid -- South American Pond Snake
  Pseudohaje Günther, 1858 -- valid
  Pseudohaje goldii (Boulenger, 1895) -- valid -- African Tree Cobra, Goldie's False Cobra, Goldie's Tree Cobra, Golds Forest Cobra
  Pseudohaje nigra Günther, 1858 -- valid -- Black Tree Cobra, Hoodless Cobra
  Pseudoleptodeira Taylor, 1939 -- valid
  Pseudoleptodeira latifasciata (Günther, 1894) -- valid -- Culebra-ojo de gato-falsa cabeza roja, False Cat-eyed Snake
  Pseudonaja Günther, 1858 -- valid
  Pseudonaja affinis Günther, 1872 -- valid -- Dugite
  Pseudonaja affinis affinis Günther, 1872 -- valid
  Pseudonaja affinis exilis Storr, 1989 -- valid
  Pseudonaja affinis tanneri Worrell, 1961 -- valid
  Pseudonaja elliotti Hoser, 2003 -- invalid
  Pseudonaja guttata (Parker, 1926) -- valid -- Speckled Brown Snake, Spotted Brown Snake
  Pseudonaja inframacula (Waite, 1925) -- valid -- Peninsula Brown Snake
  Pseudonaja ingrami (Boulenger, 1908) -- valid -- Ingram's Brown Snake
  Pseudonaja modesta (Günther, 1872) -- valid -- Ringed Brown Snake
  Pseudonaja nuchalis Günther, 1858 -- valid -- Northern Brown Snake
  Pseudonaja textilis (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Eastern Brown Snake
  Pseudotomodon Koslowsky, 1896 -- valid
  Pseudotomodon trigonatus (Leybold, 1873) -- valid -- False Tomodon Snake
  Pseustes Fitzinger, 1843 -- invalid
  Pseustes poecilonotus (Günther, 1858) -- invalid -- Culebra resoplona norteńa
  Pseustes sexcarinatus (Wagler, 1824) -- invalid
  Pseustes shropshirei (Barbour and Amaral, 1924) -- invalid
  Pseustes sulphureus (Wagler, 1824) -- invalid
  Ptychophis Gomés, 1915 -- valid
  Ptychophis flavovirgatus Gomes, 1915 -- valid -- Fanged Water Snake
  Ptychophis meyeri (Lema, 1967) -- invalid
  Regina Baird and Girard, 1853 -- valid -- Crayfish Snakes
  Regina alleni (Garman, 1874) -- invalid -- Striped Crayfish Snake
  Regina clarkii Baird and Girard, 1853 -- invalid
  Regina grahamii Baird and Girard, 1853 -- valid -- Graham's Crayfish Snake
  Regina kirtlandii Kennicott, 1856 -- invalid
  Regina rigida (Say, 1825) -- invalid
  Regina rigida deltae (Huheey, 1959) -- invalid -- Delta Crawfish Snake
  Regina rigida rigida (Say, 1825) -- invalid -- Glossy Crawfish Snake
  Regina rigida sinicola (Huheey, 1959) -- invalid -- Gulf Crawfish Snake
  Regina septemvittata (Say, 1825) -- valid -- Queen Snake, Queensnake
  Rhabdophis Fitzinger, 1843 -- valid
  Rhabdophis adleri Zhao, 1997 -- valid
  Rhabdophis angelii (Bourret, 1934) -- valid
  Rhabdophis auriculata (Günther, 1858) -- invalid -- White-lined Water Snake
  Rhabdophis auriculatus (Günther, 1858) -- valid
  Rhabdophis barbouri (Taylor, 1922) -- valid -- Barbour's Water Snake
  Rhabdophis callichromus (Bourret, 1934) -- valid -- Bavi Keelback
  Rhabdophis callistus (Günther, 1873) -- valid -- Boettger's Keelback
  Rhabdophis chrysargoides (Günther, 1858) -- valid -- Günther's Keelback
  Rhabdophis chrysargus (Schlegel, 1837) -- invalid
  Rhabdophis conspicillatus (Günther, 1872) -- valid -- Red-bellied 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 pentasupralabralis Jiang and Zhao, 1983 -- invalid
  Rhabdophis spilogaster (F. Boie, 1827) -- valid -- Boie's Keelback
  Rhabdophis subminiatus (Schlegel, 1837) -- valid -- Red-necked Keelback
  Rhabdophis swinhonis (Günther, 1868) -- valid -- Taiwan Keelback
  Rhabdophis tigrinus (F. Boie, 1826) -- valid -- Tiger Keelback
  Rhabdops Boulenger, 1893 -- valid
  Rhabdops bicolor (Blyth, 1854) -- valid -- Brown Trapezoid Snake, Two-colored Forestsnake
  Rhabdops olivaceus (Beddome, 1863) -- valid -- Olive Trapezoid Snake
  Rhachidelus Boulenger, 1908 -- valid
  Rhachidelus brazili Boulenger, 1908 -- valid -- Brazilian Bird Snake
  Rhadinaea Cope, 1863 -- valid -- Woodland Snakes, Woodlands Snakes
  Rhadinaea bogertorum Myers, 1974 -- valid -- Culebra-café oaxaqueńa, 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 godmani (Günther, 1865) -- invalid -- Culebra-café de Godman
  Rhadinaea hannsteini (Stuart, 1949) -- invalid -- Culebra-café labios manchados
  Rhadinaea hempsteadae Stuart and Bailey, 1941 -- invalid -- Culebra-café de Hempstead
  Rhadinaea hesperia Bailey, 1940 -- valid -- Culebra-café de Occidente, Western Graceful Brown Snake
  Rhadinaea kinkelini Boettger, 1898 -- invalid
  Rhadinaea lachrymans (Cope, 1870) -- invalid -- Culebra-café llorona
  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 montecristi Mertens, 1952 -- invalid
  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 pilonaorum (Stuart, 1954) -- invalid
  Rhadinaea pinicola Mertens, 1952 -- invalid
  Rhadinaea posadasi (Slevin, 1936) -- invalid -- Culebra-café de Posada
  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 schistosa (H. M. Smith, 1941) -- invalid -- Culebra-café collar-incompleto
  Rhadinaea serperaster Cope, 1871 -- invalid
  Rhadinaea taeniata (Peters, 1863) -- valid -- Culebra-café de pino-encino, Pine-Oak Snake
  Rhadinaea vermiculaticeps (Cope, 1860) -- valid -- Vermiculate Graceful Brown Snake
  Rhadinophanes Myers and Campbell, 1981 -- valid
  Rhadinophanes monticola Myers and Campbell, 1981 -- valid -- Culebra de montańa, Graceful Mountain Snake
  Rhinobothryum Wagler, 1830 -- valid
  Rhinobothryum bovallii Andersson, 1916 -- valid
  Rhinobothryum lentiginosum (Scopoli, 1785) -- valid -- Amazon Banded Snake
  Rhinoplocephalus F. Müller, 1885 -- valid
  Rhinoplocephalus bicolor F. Müller, 1885 -- valid -- Muller's Snake, Square-nosed Snake
  Rhinoplocephalus boschmai (Brongersma and Knaap-van Meeuwen, 1964) -- invalid
  Rhinoplocephalus incredibilis (Wells and Wellington, 1985) -- invalid
  Rhinoplocephalus nigriscens (Günther, 1862) -- invalid
  Rhinoplocephalus nigrostriatus (Krefft, 1864) -- invalid
  Rhinoplocephalus pallidiceps (Günther, 1858) -- invalid
  Rhinostoma occipitale Hallowell, 1854 -- invalid
  Salomonelaps McDowell, 1970 -- valid
  Salomonelaps par (Boulenger, 1884) -- valid -- Solomons Coral Snake
  Salvadora hexalepis hexalepis (Cope, 1867) -- valid -- Desert Patchnose Snake
  Saphenophis Myers, 1972 -- valid
  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
  Scolecophis fumiceps Cope, 1861 -- invalid
  Scopelophis Fitzinger, 1843 -- invalid
  Scopelophis seychellensis (Schlegel, 1837) -- invalid
  Scotophis emoryi Baird and Girard, 1853 -- invalid
  Scotophis lindheimeri Baird and Girard, 1853 -- invalid
  Scotophis vulpinus Baird and Girard, 1853 -- invalid
  Seminatrix Cope, 1895 -- invalid -- Swamp Snakes, Swampsnakes
  Seminatrix pygaea (Cope, 1871) -- invalid -- Black Swamp Snake, Black Swampsnake
  Seminatrix pygaea cyclas Dowling, 1950 -- invalid -- South Florida Swamp Snake
  Seminatrix pygaea paludis Dowling, 1950 -- invalid -- Carolina Swamp Snake
  Seminatrix pygaea pygaea (Cope, 1871) -- invalid -- North Florida Swamp Snake
  Senticolis triaspis (Cope, 1866) -- valid -- Culebra oliva, Green Rat Snake, Green Ratsnake
  Senticolis triaspis triaspis (Cope, 1866) -- valid -- Green Rat Snake
  Sibon Fitzinger, 1826 -- valid
  Sibon annulata (Günther, 1872) -- invalid
  Sibon annulifera (Boulenger, 1894) -- invalid
  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 dimidiata (Günther, 1872) -- invalid
  Sibon dunni Peters, 1957 -- valid -- Dunn's Snail Sucker
  Sibon fasciata (Günther, 1858) -- invalid
  Sibon fischeri (Boulenger, 1894) -- invalid -- Culebra-caracolera de Fisher
  Sibon longifrenis (Stejneger, 1909) -- valid -- Lichen-colored Snail Sucker, Stejneger's Snail Sucker
  Sibon nebulata (Linnaeus, 1758) -- invalid
  Sibon nebulatus nebulatus (Linnaeus, 1758) -- invalid
  Sibon philippii (Jan, 1863) -- invalid
  Sibon sanniola (Cope, 1866) -- invalid
  Sibon sartorii (Cope, 1863) -- invalid -- Culebra-caracolera terrestre
  Sibon zweifeli (Liner and Wilson, 1970) -- invalid -- Culebra-caracolera de Zweifel
  Sibynomorphus Fitzinger, 1843 -- valid
  Sibynomorphus inequifasciatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  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
  Simophis Peters, 1860 -- valid
  Simophis rhinostoma (Schlegel, 1837) -- valid -- Sao Paulo False Coral Snake
  Simophis rohdei (Boettger, 1885) -- invalid
  Simoselaps Jan, 1859 -- valid
  Simoselaps anomalus (Sternfeld, 1919) -- valid -- Northern Desert Banded Snake
  Simoselaps approximans (Glauert, 1954) -- invalid
  Simoselaps australis (Krefft, 1864) -- invalid
  Simoselaps bertholdi (Jan, 1859) -- valid -- Desert Banded Snake, Southern Desert Banded Snake
  Simoselaps bimaculatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Black-naped Burrowing Snake, Western Black-naped Snake
  Simoselaps calonotos (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Simoselaps fasciolatus (Günther, 1872) -- invalid
  Simoselaps fasciolatus fasciatus (Stirling and Zietz, 1893) -- invalid
  Simoselaps fasciolatus fasciolatus (Günther, 1872) -- invalid
  Simoselaps incinctus (Storr, 1968) -- invalid
  Simoselaps littoralis (Storr, 1968) -- valid -- Coastal Burrowing Snake, West-Coast Banded Snake
  Simoselaps minimus (Worrell, 1960) -- valid -- Dampierland Burrowing Snake
  Simoselaps roperi (Kinghorn, 1931) -- invalid
  Simoselaps semifasciatus (Günther, 1863) -- invalid
  Simoselaps semifasciatus campbelli (Kinghorn, 1929) -- invalid
  Simoselaps semifasciatus semifasciatus (Günther, 1863) -- invalid
  Simoselaps semifasciatus woodjonesi (Thomson, 1934) -- invalid
  Simoselaps semifasciatus woodjonesii (Thomson, 1934) -- invalid
  Simoselaps warro (De Vis, 1884) -- invalid
  Sinomicrurus Slowinski, Boundy and Lawson, 2001 -- valid
  Sinomicrurus hatori (Takahashi, 1930) -- valid
  Sinomicrurus japonicus (Günther, 1868) -- valid -- Japanese Coral Snake
  Sinomicrurus japonicus boettgeri (Fritze, 1894) -- valid
  Sinomicrurus japonicus japonicus (Günther, 1868) -- valid
  Sinomicrurus kelloggi (Pope, 1928) -- valid -- Kellogg's Coral Snake
  Sinomicrurus macclellandi (Reinhardt, 1844) -- valid -- MacClelland's Coral Snake
  Sinomicrurus macclellandi iwasakii (Maki, 1935) -- valid
  Sinomicrurus macclellandi macclellandi (Reinhardt, 1844) -- valid
  Sinomicrurus macclellandi swinhoei (Van Denburgh, 1912) -- valid
  Sinomicrurus macclellandi univirgatus (Günther, 1858) -- valid
  Sinomicrurus sauteri (Steindachner, 1913) -- valid -- Oriental 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 yunnanensis Rao and Yang, 1998 -- valid -- Yunnan Water Snake
  Siphlophis Fitzinger, 1843 -- valid
  Siphlophis cervinus (Laurenti, 1768) -- valid -- Panama Spotted Night 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
  Sonora Baird and Girard, 1853 -- valid -- North American Ground Snakes, North American Groundsnakes
  Sonora miniata linearis Stickel, 1938 -- invalid
  Sonora occipitalis klauberi Stickel, 1941 -- invalid
  Sonora palarostris Klauber, 1937 -- invalid
  Sonora semiannulata blanchardi Stickel, 1938 -- invalid
  Sonora semiannulata gloydi Stickel, 1938 -- invalid
  Sonora semiannulata isozona (Cope, 1867) -- invalid
  Sonora semiannulata linearis Stickel, 1938 -- invalid
  Sonora semiannulata semiannulata Baird and Girard, 1853 -- valid
  Sordellina Proctor, 1923 -- valid
  Sordellina punctata (Peters, 1880) -- valid -- Dotted Brown Snake
  Spilotes erebennus Cope, 1860 -- invalid
  Spilotes pullatus (Linnaeus, 1758) -- valid -- Chicken Snake, Culebra-ratonera mica, Tiger Snake, Tropical Rat Snake, Yellow Rat 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 dekayi anomala Dugčs, 1888 -- invalid
  Storeria dekayi dekayi (Holbrook, 1839) -- invalid -- Northern Brown Snake
  Storeria dekayi limnetes Anderson, 1961 -- invalid -- Marsh Brown Snake
  Storeria dekayi temporalineata Trapido, 1944 -- invalid
  Storeria dekayi texana Trapido, 1944 -- invalid -- Texas Brown Snake
  Storeria dekayi tropica Cope, 1885 -- invalid
  Storeria dekayi victa Hay, 1892 -- invalid -- Florida Brown Snake
  Storeria dekayi wrightorum Trapido, 1944 -- invalid -- Midland Brown Snake
  Storeria hidalgoensis Taylor, 1942 -- valid -- Culebra-parda hidalguense, Mexican Yellowbelly Brown Snake
  Storeria occipitomaculata (Storer, 1839) -- valid -- couleuvre ŕ 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
  Suta Worrell, 1961 -- valid
  Suta dwyeri (Worrell, 1956) -- invalid
  Suta fasciata (Rosén, 1905) -- valid -- Rosen's Snake
  Suta flagellum (McCoy, 1878) -- invalid
  Suta gouldii (Gray, 1841) -- invalid
  Suta monachus (Storr, 1964) -- invalid
  Suta nigriceps (Günther, 1863) -- invalid
  Suta ordensis (Storr, 1984) -- valid -- Ord Curl Snake
  Suta punctata (Boulenger, 1896) -- valid -- Little Spotted Snake, Spotted Snake
  Suta spectabilis (Krefft, 1869) -- invalid
  Suta spectabilis bushi (Storr, 1988) -- invalid
  Suta spectabilis nullarbor (Storr, 1981) -- invalid
  Suta spectabilis spectabilis (Krefft, 1869) -- invalid
  Suta suta (W. C. H. Peters, 1863) -- valid -- Curl Snake, Myal Snake
  Synophis Peracca, 1896 -- valid
  Synophis bicolor Peracca, 1896 -- valid -- Bicolored Shadow Snake
  Synophis lasallei (Nicéforo-María, 1950) -- valid -- La Salle's Shadow Snake
  Synophis miops Boulenger, 1898 -- invalid
  Tachymenis Wiegmann, 1835 -- valid
  Tachymenis affinis Boulenger, 1896 -- valid -- Boulenger's Slender Snake
  Tachymenis attenuata Walker, 1945 -- valid -- Walker's Slender Snake
  Tachymenis chilensis (Schlegel, 1837) -- valid -- Chilean Slender Snake
  Tachymenis elongata Despax, 1910 -- valid -- Depax's Slender Snake
  Tachymenis peruviana Wiegmann, 1835 -- valid -- Peru Slender Snake
  Tachymenis tarmensis Walker, 1945 -- valid -- Slender Snake
  Taeniophis imperialis Kennicott in Baird, 1859 -- invalid
  Tantalophis Duellman, 1958 -- valid
  Tantalophis discolor (Günther, 1860) -- valid -- Culebra-ojo de gato-falsa oaxaqueńa, Oaxacan Cat-eyed Snake
  Tantilla atriceps (Günther, 1895) -- valid -- Culebra-encapuchada mexicana, Mexican Black-headed Snake, Mexican Blackhead Snake
  Tantilla coronata coronata Baird and Girard, 1853 -- invalid
  Tantilla coronata wagneri (Jan, 1862) -- invalid
  Tantilla cucullata Minton, 1956 -- valid -- Big Bend Black-headed Snake, Big Bend Blackhead Snake, Trans-Pecos Black-headed Snake
  Tantilla gracilis Baird and Girard, 1853 -- valid -- Culebra-ciempiés cabeza plana, Flat-headed Snake, Flathead Snake
  Tantilla hallowelli Cope, 1860 -- invalid
  Tantilla hobartsmithi Taylor, 1936 -- valid -- Culebra-encapuchada del Suroeste, Southwestern Black-headed Snake, Southwestern Blackhead Snake
  Tantilla melanocephala (Linnaeus, 1758) -- valid -- Black-headed Snake
  Tantilla melanocephala melanocephala (Linnaeus, 1758) -- invalid
  Tantilla nigriceps fumiceps (Cope, 1861) -- invalid
  Tantilla nigriceps nigriceps Kennicott, 1860 -- invalid
  Tantilla planiceps (Blainville, 1835) -- valid -- California Black-headed Snake, Culebra-encapuchada californiana, Western Black-headed Snake, Western Blackhead Snake
  Tantilla relicta Telford, 1966 -- valid -- Florida Crowned Snake
  Tantilla rubra Cope, 1875 -- valid -- Culebra-encapuchada roja, Red Black-headed Snake, Reddish Black-headed Snake
  Tantilla rubra cucullata Minton, 1956 -- invalid
  Tantilla rubra diabola Fouquette and Potter, 1961 -- invalid -- Devil's River Black-headed Snake
  Tantilla rubra rubra Cope, 1875 -- invalid
  Tetralepis Boettger, 1892 -- valid
  Tetralepis fruhstorferi Boettger, 1892 -- valid -- Bluebelly Java Snake
  Thalassophis P. Schmidt, 1852 -- valid
  Thalassophis anomalus P. Schmidt, 1852 -- valid -- Anomalous Sea Snake
  Thamnodynastes Wagler, 1830 -- valid
  Thamnodynastes chimanta Roze, 1958 -- valid -- Roze's Coastal House Snake
  Thamnodynastes gambotensis Pérez-Santos and Moreno, 1989 -- valid
  Thamnodynastes pallidus (Linnaeus, 1758) -- valid -- Amazon Coastal House Snake
  Thamnodynastes rutilus (Prado, 1942) -- valid -- Prado's Coastal House Snake
  Thamnodynastes strigatus (Günther, 1858) -- valid -- Coastal House Snake
  Thamnodynastes strigilis (Thunberg, 1787) -- invalid
  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 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 digueti (Mocquard, 1899) -- invalid -- Culebra-listonada de Diguet
  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 atratus (Kennicott in Cooper, 1860) -- invalid
  Thamnophis elegans biscutatus (Cope, 1883) -- invalid
  Thamnophis elegans elegans (Baird and Girard, 1853) -- valid -- Mountain Garter Snake
  Thamnophis elegans gigas Fitch, 1940 -- invalid
  Thamnophis elegans hammondii (Kennicott, 1860) -- invalid
  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 montańa, 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 ordinoides (Baird and Girard, 1852) -- invalid
  Thamnophis postremus H. M. Smith, 1942 -- valid
  Thamnophis proximus (Say in James, 1823) -- valid -- Culebra-listonada occidental, Western Ribbon Snake
  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 radix haydenii (Kennicott, 1860) -- invalid -- Western Plains Garter Snake
  Thamnophis radix radix (Baird and Girard, 1853) -- invalid -- Eastern Plains Garter Snake
  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 sauritus (Linnaeus, 1766) -- invalid -- Eastern Ribbon Snake, Eastern Ribbonsnake
  Thamnophis sauritus nitae Rossman, 1963 -- invalid -- Blue-striped Ribbon Snake
  Thamnophis sauritus proximus (Say in James, 1823) -- invalid
  Thamnophis sauritus sackenii (Kennicott, 1859) -- invalid -- Peninsula Ribbon Snake
  Thamnophis sauritus sauritus (Linnaeus, 1766) -- invalid -- Eastern Ribbon Snake
  Thamnophis sauritus septentrionalis Rossman, 1963 -- invalid -- Northern Ribbon Snake
  Thamnophis scalaris Cope, 1861 -- valid -- Culebra-listonada de montańa-cola larga, Longtail Alpine Garter Snake
  Thamnophis scaliger (Jan, 1863) -- valid -- Culebra-listonada de montańa-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 valida (Kennicott, 1860) -- invalid -- Culebra-listonada de la costa-oeste
  Thamnophis validus celaeno (Cope, 1861) -- valid
  Thamnophis validus isabellae (Conant, 1953) -- valid
  Thamnophis validus thamnophisoides (Conant, 1961) -- valid
  Thamnophis validus validus (Kennicott, 1860) -- valid
  Thamnophis vicinus H. M. Smith, 1942 -- invalid
  Tomodon A. M. C. Duméril, 1853 -- valid
  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
  Toxicocalamus Boulenger, 1896 -- valid
  Toxicocalamus buergersi (Sternfeld, 1913) -- valid -- Buerger's Forest Snake
  Toxicocalamus grandis (Boulenger, 1914) -- valid -- Setekwa River Forest Snake
  Toxicocalamus holopelturus McDowell, 1969 -- valid -- Mt Rossel Forest Snake
  Toxicocalamus longissimus Boulenger, 1896 -- valid -- Fergusson Island Forest Snake, Woodlark Island Forest Snake
  Toxicocalamus loriae (Boulenger, 1898) -- valid -- Loria Forest Snake
  Toxicocalamus misimae McDowell, 1969 -- valid -- Misima Island Forest Snake
  Toxicocalamus preussi (Sternfeld, 1913) -- valid -- Preuss's Forest Snake
  Toxicocalamus spilolepidotus McDowell, 1969 -- valid -- Spotted Forest Snake
  Toxicocalamus stanleyanus Boulenger, 1903 -- valid -- Owen Stanley Range Forest 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
  Tretanorhinus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Tretanorhinus mocquardi Bocourt, 1891 -- valid -- Mocquard's Swamp Snake
  Tretanorhinus nigroluteus Cope, 1861 -- valid -- Culebra-buceadora vientre naranja, Orangebelly Swamp Snake
  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
  Trimetopon Cope, 1885 -- valid
  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 Cope, 1861 -- valid -- Lyre Snakes
  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 tau Cope, 1870 -- valid -- Culebra-lira mexicana, Mexican Lyre Snake
  Tripanurgos Fitzinger, 1843 -- invalid
  Tripanurgos compressus (Daudin, 1803) -- invalid
  Tropidechis Günther, 1863 -- valid
  Tropidechis carinatus (Krefft, 1863) -- valid -- Clarence River Snake, Rough-scaled Snake
  Tropidechis sadlieri Hoser, 2003 -- invalid
  Tropidoclonion Cope, 1860 -- valid -- Lined Snake, Lined Snakes
  Tropidoclonion lineatum (Hallowell, 1856) -- valid -- Lined Snake
  Tropidodryas Fitzinger, 1843 -- valid
  Tropidodryas serra (Schlegel, 1837) -- valid -- Serra Snake
  Tropidodryas straticeps (Amaral, 1938) -- invalid
  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 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 concinnus Hallowell, 1852 -- invalid
  Tropidonotus dekayi Holbrook, 1839 -- invalid
  Tropidonotus ordinoides Baird and Girard, 1852 -- invalid
  Tropidonotus rhombifer Hallowell, 1852 -- invalid
  Tropidonotus trivittatus Hallowell, 1853 -- invalid
  Umbrivaga Roze, 1964 -- invalid
  Umbrivaga mertensi Roze, 1964 -- invalid
  Umbrivaga pyburni Markezich and Dixon, 1979 -- invalid
  Umbrivaga pygmaea (Cope, 1868) -- invalid
  Uromacer A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Uromacer catesbyi (Schlegel, 1837) -- valid -- Catesby's Pointed Snake
  Uromacer frenatus (Günther, 1865) -- valid -- Island Pointed Snake
  Uromacer oxrhynchus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- invalid
  Uromacerina Amaral, 1929 -- valid
  Uromacerina ricardinii (Peracca, 1897) -- valid -- Sao Paulo Sharp Snake
  Urotheca Bibron, 1843 -- valid
  Urotheca decipiens (Günther, 1893) -- valid -- Pale Ground Snake
  Urotheca dumerilii (Bibron, 1840) -- valid
  Urotheca elapoides (Cope, 1860) -- invalid -- Culebra-imita coral común
  Urotheca euryzonus (Cope, 1862) -- invalid
  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
  Urotheca williamsi Roze, 1958 -- invalid
  Vermicella Gray in Günther, 1858 -- valid
  Vermicella annulata (Gray in Gray, 1841) -- valid -- Bandy Bandy, Eastern Bandy-bandy
  Vermicella intermedia Keogh and S. A. Smith, 1996 -- valid
  Vermicella multifasciata (Longman, 1915) -- valid -- Northern Bandy Bandy
  Vermicella snelli Storr, 1968 -- valid
  Vermicella vermiformis Keogh and S. A. Smith, 1996 -- valid
  Virginia Baird and Girard, 1853 -- invalid -- Earth Snakes, Earthsnakes
  Virginia elegans Kennicott, 1859 -- invalid -- Western Smooth Earthsnake
  Virginia striatula (Linnaeus, 1766) -- invalid -- Rough Earth Snake, Rough Earthsnake
  Virginia valeriae Baird and Girard, 1853 -- invalid -- Smooth Earth Snake, Smooth Earthsnake
  Virginia valeriae elegans Kennicott, 1859 -- invalid -- Western Earth Snake
  Virginia valeriae pulchra (Richmond, 1954) -- invalid -- Mountain Earth Snake
  Virginia valeriae valeriae Baird and Girard, 1853 -- invalid -- Eastern Earth Snake
  Waglerophis Romano and Hoge, 1973 -- invalid
  Waglerophis merremi (Wagler, 1824) -- invalid
  Walterinnesia Lataste, 1887 -- valid
  Walterinnesia aegyptia Lataste, 1887 -- valid -- Desert Cobra
  Xenocalamus Günther, 1868 -- valid
  Xenocalamus bicolor Günther, 1868 -- valid -- Slender Quill-snouted Snake
  Xenocalamus bicolor australis Fitzsimons, 1946 -- valid -- Waterberg Quill-snouted Snake
  Xenocalamus bicolor bicolor Günther, 1868 -- valid -- Bicolored Quill-snouted Snake
  Xenocalamus bicolor concavorostralis Hoffman, 1940 -- valid
  Xenocalamus bicolor lineatus Roux, 1907 -- valid -- Striped Quill-snouted Snake
  Xenocalamus bicolor machadoi Laurent, 1954 -- valid
  Xenocalamus bicolor maculatus Fitzsimons, 1937 -- valid
  Xenocalamus mechowii Peters, 1881 -- valid -- Elongate Quill-snouted Snake
  Xenocalamus mechowii inornatus de Witte and Laurent, 1947 -- valid
  Xenocalamus mechowii mechowii Peters, 1881 -- valid
  Xenocalamus michelli Müller, 1911 -- valid
  Xenocalamus sabiensis Broadley, 1971 -- valid -- Sabi Quill-snouted Snake
  Xenocalamus transvaalensis Methuen, 1919 -- valid -- Transvaal Quill-snouted Snake
  Xenochrophis Günther, 1864 -- valid
  Xenochrophis asperrimus (Boulenger, 1891) -- valid -- Boulenger's Keelback
  Xenochrophis bellulus (Stoliczka, 1871) -- valid
  Xenochrophis cerasogaster (Cantor, 1839) -- valid -- Painted Keelback
  Xenochrophis flavipunctatus (Hallowell, 1861) -- valid -- Yellow-spotted Keelback
  Xenochrophis maculatus (Edeling, 1864) -- valid -- Spotted Keelback
  Xenochrophis melanzostus (Gravenhorst, 1807) -- valid -- Javanese Keelback Water Snake
  Xenochrophis piscator (Schneider, 1799) -- valid -- Asiatic Water Snakes, Checkered Keelback
  Xenochrophis punctulatus (Günther, 1858) -- valid
  Xenochrophis sanctijohannis (Boulenger, 1890) -- valid -- St. John's Keelback
  Xenochrophis schnurrenbergeri Kramer, 1977 -- valid -- Bar-necked Keelback
  Xenochrophis trianguligerus (F. Boie, 1827) -- valid -- Triangle Keelback
  Xenochrophis tytleri (Blyth, 1863) -- valid -- Tytler's Keelback
  Xenochrophis vittatus (Linnaeus, 1758) -- valid -- Banded Keelback, Striped Keelback
  Xenodon F. Boie, 1827 -- valid
  Xenodon bertholdi Jan, 1863 -- invalid
  Xenodon guentheri Boulenger, 1894 -- valid -- Günther's False Fer-de-lance
  Xenodon neuwiedii Günther, 1863 -- valid -- Neuwied's False Fer-de-lance
  Xenodon rabdocephalus (Wied-Neuwied, 1824) -- valid -- Culebra-engańosa norteńa, False Fer-de-lance
  Xenodon severus (Linnaeus, 1758) -- valid -- Amazon False Fer-de-lance
  Xenodon werneri Eiselt, 1963 -- valid
  Xenodontinae Cope, 1895 -- invalid
  Xenopholis Peters, 1869 -- valid
  Xenopholis scalaris (Wucherer, 1861) -- valid -- Wucherer's Ground Snake
  Xenopholis undulatus (Jensen, 1900) -- valid -- Jensen's Ground Snake
  Xylophis Beddome, 1878 -- valid
  Xylophis perroteti (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Perrotet's Mountain Snake
  Xylophis stenorhynchus (Günther, 1875) -- valid -- Günther's Mountain Snake
   

A gray bar