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Publication: McDiarmid, Roy W., Jonathan A. Campbell, and T'Shaka A. Touré. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1. xi + 511.

ITIS records citing this publication
 
 Kingdom Animalia
  Acontias leucostoma Troost, 1836 -- invalid
  Acrantophis Jan in Jan and Sordelli, 1860 -- valid
  Acrantophis dumerili Jan in Jan and Sordelli, 1860 -- valid
  Acrantophis madagascariensis (Duméril and Bibron, 1844) -- valid
  Acrochordidae Bonaparte, 1831 -- valid -- Wart Snakes
  Acrochordus Hornstedt, 1787 -- valid -- Java Wart Snakes
  Acrochordus arafurae McDowell, 1979 -- valid
  Acrochordus granulatus (Schneider, 1799) -- valid
  Acrochordus javanicus Hornstedt, 1787 -- valid
  Acrocordus Hornstedt, 1787 -- invalid
  Acutotyphlops Wallach, 1995 -- valid
  Acutotyphlops infralabialis (Waite, 1918) -- valid
  Acutotyphlops kunuaensis Wallach, 1995 -- valid
  Acutotyphlops solomonis (Parker, 1939) -- valid
  Acutotyphlops subocularis (Waite, 1897) -- valid
  Adenorhinos Marx and Rabb, 1965 -- invalid
  Adenorhinos barbouri (Loveridge, 1930) -- invalid
  Agkistrodon Palisot de Beauvois, 1799 -- valid -- Copperheads, Cottonmouths
  Agkistrodon bilineatus Günther, 1863 -- valid -- Cantil enjaquimado, Mexican Moccasin
  Agkistrodon bilineatus bilineatus Günther, 1863 -- invalid
  Agkistrodon bilineatus howardgloydi Conant, 1984 -- invalid
  Agkistrodon bilineatus russeolus Gloyd, 1972 -- invalid
  Agkistrodon bilineatus taylori Burger and Robertson, 1951 -- invalid
  Agkistrodon contortrix (Linnaeus, 1766) -- valid -- Cantil cobrizo, Copperhead
  Agkistrodon contortrix contortrix (Linnaeus, 1766) -- valid -- Southern Copperhead
  Agkistrodon contortrix laticinctus Gloyd and Conant, 1934 -- valid -- Broad-banded Copperhead
  Agkistrodon contortrix mokasen Palisot de Beauvois, 1799 -- valid -- Northern Copperhead
  Agkistrodon contortrix phaeogaster Gloyd, 1969 -- valid -- Osage Copperhead
  Agkistrodon contortrix pictigaster Gloyd and Conant, 1943 -- valid -- Trans-Pecos Copperhead
  Agkistrodon mokeson austrinus Gloyd and Conant, 1943 -- invalid
  Agkistrodon mokeson laticinctus Gloyd and Conant, 1934 -- invalid
  Agkistrodon mokeson pictigaster Gloyd and Conant, 1943 -- invalid
  Agkistrodon piscivorus (Lacépède, 1789) -- valid -- Cottonmouth
  Agkistrodon piscivorus conanti Gloyd, 1969 -- valid -- Florida Cottonmouth
  Agkistrodon piscivorus leucostoma (Troost, 1836) -- valid -- Western Cottonmouth
  Agkistrodon piscivorus piscivorus (Lacépède, 1789) -- valid -- Eastern Cottonmouth
  Alethinophidia Nopcsa, 1923 -- valid
  Aniliidae Stejneger, 1907 -- valid -- False Coral Snakes
  Anilius Oken, 1816 -- valid -- Pipe Snakes
  Anilius scytale (Linnaeus, 1758) -- valid -- Red Pipe Snake
  Anilius scytale phelpsorum Roze, 1958 -- valid
  Anilius scytale scytale (Linnaeus, 1758) -- valid
  Anomalepididae Taylor, 1939 -- valid -- Primitive Blind Snakes
  Anomalepis Jan, 1860 -- valid
  Anomalepis aspinosus Taylor, 1939 -- valid
  Anomalepis colombia Marx, 1953 -- valid
  Anomalepis flavapices Peters, 1957 -- valid
  Anomalepis mexicanus Jan, 1860 -- valid
  Anomalochilus Lidth de Jeude in Weber, 1890 -- invalid
  Anomochilidae Cundall, Wallach and Rossman, 1993 -- valid -- Dwarf Pipe Snakes
  Anomochilus Berg, 1901 -- valid -- Dwarf Pipesnakes
  Anomochilus leonardi Smith, 1940 -- valid
  Anomochilus weberi (Lidth de Jeude in Weber, 1890) -- valid
  Antaresia Wells and Wellington, 1984 -- valid
  Antaresia childreni (Gray, 1842) -- valid
  Antaresia maculosa (Peters, 1873) -- valid
  Antaresia perthensis (Stull, 1932) -- valid
  Antaresia stimsoni (Smith, 1985) -- valid
  Apodora Kluge, 1993 -- valid
  Apodora papuana (Peters and Doria, 1878) -- valid
  Aspidites Peters, 1877 -- valid
  Aspidites melanocephalus (Krefft, 1864) -- valid
  Aspidites ramsayi (Macleay, 1882) -- valid
  Atheris Cope, 1862 -- valid
  Atheris anisolepis Mocquard, 1887 -- valid -- Mayombe Bush-Viper
  Atheris ceratophora Werner, 1896 -- valid
  Atheris chlorechis (Pel, 1851) -- valid
  Atheris desaixi Ashe, 1968 -- valid -- Ashe's Bush Viper
  Atheris hispida Laurent, 1955 -- valid -- African Hairy Bush Viper
  Atheris katangensis de Witte, 1953 -- valid -- Katanga Mountain Bush Viper
  Atheris nitschei Tornier, 1902 -- valid -- Great Lakes Bush Viper
  Atheris nitschei nitschei Tornier, 1902 -- invalid
  Atheris nitschei rungwensis Bogert, 1940 -- invalid
  Atheris squamigera (Hallowell, 1854) -- valid -- African Bush Viper, Rough-scaled Bush Viper, Variable Bush Viper
  Atropoides Werman, 1992 -- valid
  Atropoides nummifer (Rüppell, 1845) -- valid -- Jumping Pit Viper, Nauyaca o nayaraca saltadora
  Atropoides nummifer mexicanus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Atropoides nummifer nummifer (Rüppell, 1845) -- invalid
  Atropoides nummifer occiduus (Hoge, 1966) -- invalid
  Atropoides olmec (Perez-Higareda, H. M. Smith and Julia-Zertuche, 1985) -- valid -- Nauyaca de Los Tuxtlas, Olmecan Pit Viper
  Atropoides picadoi (Dunn, 1939) -- valid -- Picado's Pit Viper
  Azemiopinae Liem, Marx and Rabb, 1971 -- valid
  Azemiops Boulenger, 1888 -- valid
  Azemiops feae Boulenger, 1888 -- valid -- Black-headed Burmese Viper, Fea Viper
  Bitis Gray, 1842 -- valid
  Bitis arietans (Merrem, 1820) -- valid -- Puff Adder
  Bitis arietans arietans (Merrem, 1820) -- valid
  Bitis arietans somalica Parker, 1949 -- valid
  Bitis atropos (Linnaeus, 1758) -- valid -- Mountain Adder
  Bitis caudalis (A. Smith, 1839) -- valid -- Horned Adder
  Bitis cornuta (Daudin, 1803) -- valid -- Many-horned Adder
  Bitis cornuta albanica Hewitt, 1937 -- invalid
  Bitis cornuta cornuta (Daudin, 1803) -- invalid
  Bitis gabonica (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Gaboon Adder, Gaboon Viper
  Bitis gabonica gabonica (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Bitis gabonica rhinoceros (Schlegel, 1855) -- invalid
  Bitis heraldica (Bocage, 1889) -- valid -- Angolan Adder, Bocage's Horned Adder
  Bitis inornata (A. Smith, 1838) -- valid -- Hornless Adder, Plain Mountain Adder
  Bitis nasicornis (Shaw, 1802) -- valid -- Rhinoceros Viper
  Bitis parviocula Böhme, 1976 -- valid -- Bale Mountains Adder
  Bitis peringueyi (Boulenger, 1888) -- valid -- Dwarf Puff Adder, Peringuey's Adder
  Bitis rubida Branch, 1997 -- valid
  Bitis schneideri (Boettger, 1886) -- valid -- Namaqua Dwarf Adder, Namaqua Puff Adder
  Bitis worthingtoni Parker, 1932 -- valid -- Kenya Horned Viper
  Bitis xeropaga Haacke, 1975 -- valid -- Desert Mountain Adder
  Boa Linnaeus, 1758 -- valid -- Boas
  Boa constrictor Linnaeus, 1758 -- valid -- Boa Constrictor, Boa constrictor
  Boa constrictor amarali (Stull, 1932) -- valid
  Boa constrictor constrictor Linnaeus, 1758 -- valid
  Boa constrictor imperator Daudin, 1803 -- valid
  Boa constrictor longicauda Price and Russo, 1991 -- valid
  Boa constrictor melanogaster Langhammer, 1983 -- invalid
  Boa constrictor nebulosa (Lazell, 1964) -- valid
  Boa constrictor occidentalis Philippi, 1873 -- valid
  Boa constrictor orophias Linnaeus, 1758 -- valid
  Boa constrictor ortonii Cope, 1878 -- valid
  Boa constrictor sabogae (Barbour, 1906) -- valid
  Boa contortrix Linnaeus, 1766 -- invalid
  Boa dumerili (Jan in Jan and Sordelli, 1860) -- invalid
  Boa madagascariensis (Duméril and Bibron, 1844) -- invalid
  Boa manditra Kluge, 1991 -- invalid
  Boidae Gray, 1825 -- valid -- Boas, Boids
  Boinae Gray, 1825 -- invalid
  Bolyeria Gray, 1842 -- valid
  Bolyeria multocarinata (Boie, 1827) -- valid -- Round Island Boa
  Bolyeriidae Hoffstetter, 1946 -- valid -- Mauritius Snakes
  Bothriechis Peters, 1859 -- valid
  Bothriechis aurifer (Salvin, 1860) -- valid -- Nauyaca-de árbol manchas amarillas, Yellow-blotched Palm Pit Viper
  Bothriechis bicolor (Bocourt, 1868) -- valid -- Guatemala Palm Pit Viper, Nauyaca-de árbol bicolor
  Bothriechis lateralis Peters, 1862 -- valid -- Coffee Palm Viper
  Bothriechis marchi (Barbour and Loveridge, 1929) -- valid -- March's Palm Pit Viper
  Bothriechis nigroviridis Peters, 1859 -- valid -- Black-speckled Palm Pit Viper
  Bothriechis rowleyi (Bogert, 1968) -- valid -- Nauyaca-de árbol de Rowley, Rowley's Palm Pit Viper
  Bothriechis schlegelii (Berthold, 1846) -- valid -- Eyelash Viper
  Bothriopsis Peters, 1861 -- invalid
  Bothriopsis bilineata (Wied-Neuwied, 1821) -- invalid
  Bothriopsis bilineata bilineata (Wied-Neuwied, 1821) -- invalid
  Bothriopsis bilineata smaragdinus (Hoge, 1966) -- invalid
  Bothriopsis medusa (Sternfeld, 1920) -- invalid
  Bothriopsis oligolepis (Werner, 1901) -- invalid
  Bothriopsis peruviana (Boulenger, 1903) -- invalid -- Peru Forest Pit Viper
  Bothriopsis pulchra (Peters, 1862) -- invalid
  Bothriopsis punctata (Garcia, 1896) -- invalid
  Bothriopsis taeniata (Wagler, 1824) -- invalid
  Bothriopsis taeniata lichenosa (Roze, 1958) -- invalid
  Bothriopsis taeniata taeniata (Wagler, 1824) -- invalid
  Bothrochilus Fitzinger, 1843 -- valid
  Bothrochilus albertisii (Peters and Doria, 1878) -- invalid
  Bothrochilus boa (Schlegel, 1837) -- valid
  Bothrops Wagler, 1824 -- valid
  Bothrops alternatus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Urutu
  Bothrops ammodytoides Leybold, 1873 -- valid -- Yararanata
  Bothrops andianus Amaral, 1923 -- invalid
  Bothrops asper (Garman, 1883) -- valid -- Nauyaca-terciopelo real, Terciopelo, Terciopelo
  Bothrops atrox (Linnaeus, 1758) -- valid -- Barba Amarilla, Common Lancehead, Fer-de-Lance
  Bothrops barnetti Parker, 1938 -- valid -- Barnett's Lancehead
  Bothrops brazili Hoge, 1954 -- valid -- Brazil's Lancehead
  Bothrops campbelli Freire-Lascano, 1991 -- invalid
  Bothrops caribbaeus (Garman, 1887) -- valid -- Saint Lucia Viper
  Bothrops colombianus Rendahl and Vestergren, 1940 -- invalid
  Bothrops cotiara (Gomes, 1913) -- valid
  Bothrops erythromelas Amaral, 1923 -- valid -- Caatinga Lancehead
  Bothrops fonsecai Hoge and Belluomini, 1959 -- valid -- Fonseca's Lancehead
  Bothrops hyoprorus Amaral, 1935 -- invalid
  Bothrops iglesiasi Amaral, 1923 -- invalid
  Bothrops insularis (Amaral, 1921) -- valid -- Golden Lancehead
  Bothrops itapetiningae (Boulenger, 1907) -- valid -- Sao Paulo Lancehead
  Bothrops jararaca (Wied-Neuwied, 1824) -- valid
  Bothrops jararacussu Lacerda, 1884 -- valid
  Bothrops jonathani Harvey, 1994 -- valid -- Jonathan's Lancehead
  Bothrops lanceolatus (Bonnaterre, 1790) -- valid -- Martinique Lancehead
  Bothrops leucurus Wagler, 1824 -- valid -- Whitetail Lancehead
  Bothrops lojanus Parker, 1930 -- valid -- Lojan Lancehead
  Bothrops marajoensis Hoge, 1966 -- valid -- Marajó Lancehead
  Bothrops microphthalmus Cope, 1875 -- invalid
  Bothrops moojeni Hoge, 1966 -- valid -- Brazilian Lancehead
  Bothrops nasutus Bocourt, 1868 -- invalid
  Bothrops neuwiedi Wagler, 1824 -- valid -- Jararaca Pintada
  Bothrops neuwiedi bolivianus Amaral, 1927 -- invalid
  Bothrops neuwiedi diporus Cope, 1862 -- invalid
  Bothrops neuwiedi goyazensis Amaral, 1925 -- invalid
  Bothrops neuwiedi lutzi (Miranda-Ribeiro, 1915) -- invalid
  Bothrops neuwiedi mattogrossensis Amaral, 1925 -- invalid
  Bothrops neuwiedi meridionalis Müller, 1885 -- invalid
  Bothrops neuwiedi neuwiedi Wagler, 1824 -- invalid
  Bothrops neuwiedi paramanensis Amaral, 1925 -- invalid
  Bothrops neuwiedi pauloensis Amaral, 1925 -- invalid
  Bothrops neuwiedi piauhyensis Amaral, 1925 -- invalid
  Bothrops neuwiedi pubescens (Cope, 1870) -- invalid
  Bothrops neuwiedi urutu (Liais, 1872) -- invalid
  Bothrops nummifer (Rüppell, 1845) -- invalid
  Bothrops ophryomegas Bocourt, 1868 -- invalid
  Bothrops pictus (Tschudi, 1845) -- valid -- Desert Lancehead
  Bothrops pirajai Amaral, 1923 -- valid -- Piraja's Lancehead
  Bothrops pradoi (Hoge, 1948) -- invalid
  Bothrops sanctaecrucis Hoge, 1966 -- valid -- Bolivian Lancehead
  Bothrops schlegelii (Berthold, 1846) -- invalid
  Bothrops urutu (Liais, 1872) -- invalid
  Bothrops venezuelensis Sandner-Montilla, 1952 -- valid
  Brachyophidium Wall, 1921 -- valid
  Brachyophidium rhodogaster Wall, 1921 -- valid
  Calabaria Gray, 1858 -- valid
  Calabaria reinhardtii (Schlegel, 1848) -- valid
  Calloselasma Cope, 1860 -- valid
  Calloselasma rhodostoma (Kuhl, 1824) -- valid -- Malayan Pit Viper
  Candoia Gray, 1842 -- valid -- Bevel-nosed Boas, Keel-scaled Boas
  Candoia aspera (Günther, 1877) -- valid
  Candoia bibroni (Duméril and Bibron, 1844) -- valid -- Bibron's Bevel-nosed Boa, Bibron's Keel-scaled Boa, Pacific Tree Boa
  Candoia bibroni australis (Montrouzier, 1860) -- valid
  Candoia bibroni bibroni (Duméril and Bibron, 1844) -- valid
  Candoia carinata (Schneider, 1801) -- valid -- Pacific Ground Boa, Pacific Keel-scaled Boa
  Candoia carinata carinata (Schneider, 1801) -- valid
  Candoia carinata paulsoni (Stull, 1956) -- invalid
  Casarea Gray, 1842 -- valid
  Casarea dussumieri (Schlegel, 1837) -- valid -- Round Island Boa
  Caudisona atrox sonoraensis Kennicott, 1861 -- invalid
  Caudisona lepida Kennicott, 1861 -- invalid
  Caudisona lucifer cerberus Coues in Wheeler, 1875 -- invalid
  Caudisona mitchellii Cope, 1861 -- invalid
  Caudisona pyrrha Cope, 1867 -- invalid
  Caudisona scutulata Kennicott, 1861 -- invalid
  Causinae Cope, 1859 -- valid
  Causus Wagler, 1830 -- valid
  Causus bilineatus Boulenger, 1905 -- valid -- Two-lined Night Adder, Two-Striped Night Adder
  Causus defilippii (Jan, 1863) -- valid -- Snouted Night Adder
  Causus lichtensteinii (Jan, 1859) -- valid -- Forest Night Adder
  Causus maculatus (Hallowell, 1842) -- valid -- Spotted Night Adder, West-African Night Adder
  Causus resimus (Peters, 1862) -- valid -- Green Night Adder
  Causus rhombeatus (Lichtenstein, 1823) -- valid -- Common Night Adder, Rhombic Night Adder
  Cenchris mokeson Daudin, 1803 -- invalid
  Cerastes Laurenti, 1768 -- valid
  Cerastes cerastes (Linnaeus, 1758) -- valid -- Desert Horned Viper
  Cerastes gasperettii Leviton and Anderson, 1967 -- valid
  Cerastes vipera (Linnaeus, 1758) -- valid -- Sahara Sand Viper
  Cerrophidion Campbell and Lamar, 1992 -- valid
  Cerrophidion barbouri (Dunn, 1919) -- invalid -- Nauyaca-de montaña guerrerense
  Cerrophidion godmani (Günther, 1863) -- valid -- Godman's Montane Pit Viper, Nauyaca-de montaña de Godman
  Cerrophidion tzotzilorum (Campbell, 1985) -- valid -- Nauyaca-de montaña tzotzil, Tzotzil Montane Pit Viper
  Charina Gray, 1849 -- valid -- Rosy Boas, Rubber Boas
  Charina bottae (Blainville, 1835) -- valid -- Rubber Boa
  Charina bottae bottae (Blainville, 1835) -- invalid
  Charina bottae umbratica Klauber, 1943 -- invalid
  Charina bottae utahensis Van Denburgh, 1920 -- invalid
  Charina reinhardtii (Schlegel, 1848) -- invalid
  Charina trivirgata (Cope, 1861) -- invalid -- Rosy Boa
  Charina trivirgata gracia (Klauber, 1931) -- invalid -- Desert Rosy Boa
  Charina trivirgata roseofusca (Cope, 1868) -- invalid -- Coastal Rosy Boa
  Charina trivirgata trivirgata (Cope, 1861) -- invalid -- Mexican Rosy Boa
  Chersidrus Oken, 1817 -- invalid
  Chersydrus Cuvier, 1817 -- invalid
  Chondropython Meyer, 1874 -- invalid
  Chondropython viridis (Schlegel, 1872) -- invalid
  Corallus Daudin, 1803 -- valid -- Neotropical Tree Boas
  Corallus annulatus (Cope, 1875) -- valid
  Corallus annulatus annulatus (Cope, 1875) -- invalid
  Corallus annulatus blombergi (Rendahl and Vestergren, 1941) -- invalid
  Corallus annulatus colombianus (Rendahl and Vestergren, 1940) -- invalid
  Corallus caninus (Linnaeus, 1758) -- valid
  Corallus cookii Gray, 1842 -- valid -- Cook's Tree Boa, Neotropical Tree Boa
  Corallus cropanii (Hoge, 1953) -- valid
  Corallus enydris (Linnaeus, 1758) -- invalid
  Corallus enydris cookii Gray, 1842 -- invalid
  Corallus enydris enydris (Linnaeus, 1758) -- invalid
  Corallus grenadensis (Barbour, 1914) -- valid
  Corallus hortulanus (Linnaeus, 1758) -- valid -- Amazon Tree Boa, Common Tree Boa
  Corallus hortulanus hortulanus (Linnaeus, 1758) -- valid
  Corallus ruschenbergerii (Cope, 1876) -- valid
  Crotalinae Oppel, 1811 -- valid
  Crotalinus catenatus Rafinesque-Schmaltz, 1818 -- invalid
  Crotalophorus edwardsii Baird and Girard, 1853 -- invalid
  Crotalus Linnaeus, 1758 -- valid -- Rattlesnakes
  Crotalus adamanteus Palisot de Beauvois, 1799 -- valid -- Eastern Diamond-backed Rattlesnake, Eastern Diamondback Rattlesnake
  Crotalus adamanteus ruber Cope, 1892 -- invalid
  Crotalus aquilus Klauber, 1952 -- valid -- Queretaran Dusky Rattlesnake
  Crotalus atricaudatus Latreille in Sonnini and Latreille, 1801 -- invalid
  Crotalus atrox Baird and Girard, 1853 -- valid -- Víbora-cascabel de diamantes, Western Diamond-backed Rattlesnake, Western Diamondback Rattlesnake
  Crotalus basiliscus (Cope, 1864) -- valid -- Víbora-cascabel de Saye
  Crotalus catalinensis Cliff, 1954 -- valid -- Víbora-cascabel muda
  Crotalus cerastes Hallowell, 1854 -- valid -- Sidewinder, Víbora-cascabel cornuda
  Crotalus cerastes cerastes Hallowell, 1854 -- valid -- Mojave Desert Sidewinder
  Crotalus cerastes cercobombus Savage and Cliff, 1953 -- valid -- Sonoran Desert Sidewinder, Sonoran Sidewinder
  Crotalus cerastes laterorepens Klauber, 1944 -- valid -- Colorado Desert Sidewinder
  Crotalus concolor Woodbury, 1929 -- invalid
  Crotalus confluentus abyssus Klauber, 1930 -- invalid
  Crotalus confluentus lutosus Klauber, 1930 -- invalid
  Crotalus confluentus nuntius Klauber, 1935 -- invalid
  Crotalus confluentus stephensi Klauber, 1930 -- invalid
  Crotalus durissus Linnaeus, 1758 -- valid -- Cascabel Rattlesnake, Central American Rattlesnake, South American Rattlesnake, Víbora-cascabel tropical
  Crotalus durissus cascavella Wagler, 1824 -- invalid
  Crotalus durissus collilineatus Amaral, 1926 -- invalid
  Crotalus durissus culminatus Klauber, 1952 -- invalid
  Crotalus durissus cumanensis Humboldt, 1811 -- valid
  Crotalus durissus dryinus Linnaeus, 1758 -- invalid
  Crotalus durissus durissus Linnaeus, 1758 -- valid
  Crotalus durissus marajoensis Hoge, 1966 -- valid
  Crotalus durissus maricelae García Pérez, 1995 -- invalid
  Crotalus durissus ruruima Hoge, 1966 -- valid
  Crotalus durissus terrificus (Laurenti, 1768) -- valid
  Crotalus durissus totonacus Gloyd and Kauffeld, 1940 -- invalid
  Crotalus durissus trigonicus Harris and Simmons, 1978 -- valid -- Rupununi Savanna Rattlesnake
  Crotalus durissus tzabcan Klauber, 1952 -- invalid
  Crotalus enyo (Cope, 1861) -- valid -- Baja California Rattlesnake, Lower California Rattlesnake, Víbora-cascabel bajacaliforniana
  Crotalus enyo cerralvensis Cliff, 1954 -- valid -- Cerralvo Rattlesnake
  Crotalus enyo enyo (Cope, 1861) -- valid -- Baja California Rattlesnake
  Crotalus enyo furvus Lowe and Norris, 1954 -- valid -- Rosario Rattlesnake
  Crotalus exsul Garman, 1884 -- invalid -- Red Diamond Rattlesnake, Víbora-cascabel de Isla Cedros
  Crotalus helleri Meek, 1905 -- invalid
  Crotalus horridus Linnaeus, 1758 -- valid -- crotale des bois, Timber Rattlesnake
  Crotalus horridus atricaudatus Latreille in Sonnini and Latreille, 1801 -- invalid
  Crotalus horridus horridus Linnaeus, 1758 -- invalid
  Crotalus horridus unicolor Van Lidth de Jeude, 1887 -- invalid
  Crotalus intermedius Troschel, 1865 -- valid -- Mexican Smallhead Rattlesnake, Víbora-cascabel enana
  Crotalus intermedius gloydi Taylor, 1941 -- valid
  Crotalus intermedius intermedius Troschel in Müller, 1865 -- valid
  Crotalus intermedius omiltemanus Günther, 1895 -- valid
  Crotalus lannomi Tanner, 1966 -- valid -- Autlán Long-tailed Rattlesnake, Manantlán Long-tailed Rattlesnake, Víbora-cascabel de Autlán
  Crotalus lepidus (Kennicott, 1861) -- valid -- Rock Rattlesnake, Víbora-cascabel variable
  Crotalus lepidus klauberi Gloyd, 1936 -- valid -- Banded Rock Rattlesnake
  Crotalus lepidus lepidus (Kennicott, 1861) -- valid -- Mottled Rock Rattlesnake
  Crotalus lepidus maculosus Tanner, Dixon and Harris, 1972 -- valid -- Durangan Rock Rattlesnake
  Crotalus lepidus morulus Klauber, 1952 -- invalid
  Crotalus maricelae García Pérez, 1995 -- invalid
  Crotalus miliarius Linnaeus, 1766 -- invalid
  Crotalus mitchellii (Cope, 1861) -- valid -- Speckled Rattlesnake
  Crotalus mitchellii angelensis Klauber, 1963 -- invalid
  Crotalus mitchellii mitchellii (Cope, 1861) -- invalid -- Speckled Rattlesnake
  Crotalus mitchellii muertensis Klauber, 1949 -- invalid
  Crotalus mitchellii pyrrhus (Cope, 1867) -- invalid -- Southwestern Speckled Rattlesnake
  Crotalus mitchellii stephensi Klauber, 1930 -- invalid -- Panamint Rattlesnake
  Crotalus molossus Baird and Girard, 1853 -- valid -- Black-tailed Rattlesnake, Víbora-cascabel cola negra
  Crotalus molossus estebanensis Klauber, 1949 -- valid
  Crotalus molossus molossus Baird and Girard, 1853 -- valid -- Black-tailed Rattlesnake
  Crotalus molossus nigrescens Gloyd, 1936 -- valid -- Mexican Black-tailed Rattlesnake
  Crotalus molossus oaxacus Gloyd, 1948 -- valid -- Oaxacan Black-tailed Rattlesnake
  Crotalus oreganus Holbrook, 1840 -- valid -- Northern Pacific Rattlesnake, Western Rattlesnake
  Crotalus piscivorus Lacépède, 1789 -- invalid
  Crotalus polystictus (Cope, 1865) -- valid -- Mexican Lancehead Rattlesnake, Víbora-cascabel ocelada
  Crotalus pricei Van Denburgh, 1895 -- valid -- Twin-spotted Rattlesnake, Víbora-cascabel motas gemelas
  Crotalus pricei miquihuanus Gloyd, 1940 -- valid -- Eastern Twin Spotted Rattlesnake
  Crotalus pricei pricei Van Denburgh, 1895 -- valid -- Arizona Twin Spotted Rattlesnake, Twin-spotted Rattlesnake, Western Twin Spotted Rattlesnake
  Crotalus pusillus Klauber, 1952 -- valid -- Tancitaran Dusky Rattlesnake, Víbora-cascabel de Tancítaro
  Crotalus ruber Cope, 1892 -- valid -- Red Diamond Rattlesnake, Víbora-cascabel colorada
  Crotalus ruber lorenzoensis Radcliffe and Maslin, 1975 -- invalid
  Crotalus ruber lucasensis Van Denburgh, 1920 -- valid -- San Lucan Rattlesnake
  Crotalus ruber ruber Cope, 1892 -- valid -- Red Diamond Rattlesnake
  Crotalus scutulatus (Kennicott, 1861) -- valid -- Green Rattlesnake, Mohave Rattlesnake, Mojave Rattlesnake, Víbora-cascabel del Altiplano
  Crotalus scutulatus salvini Günther, 1895 -- valid -- Huamantlan Rattlesnake
  Crotalus scutulatus scutulatus (Kennicott, 1861) -- valid -- Mojave Rattlesnake, Northern Mohave Rattlesnake
  Crotalus stejnegeri Dunn, 1919 -- valid -- Sinaloan Long-tailed Rattlesnake, Víbora-cascabel cola larga
  Crotalus tergeminus Say in James, 1823 -- invalid
  Crotalus tigris Kennicott, 1859 -- valid -- Tiger Rattlesnake, Víbora-cascabel tigre
  Crotalus tortugensis Van Denburgh and Slevin, 1921 -- invalid -- Tortuga Island Rattlesnake, Víbora-cascabel de Isla Tortuga
  Crotalus transversus Taylor, 1944 -- valid -- Cross-banded Mountain Rattlesnake, Víbora-cascabel bandas cruzadas
  Crotalus triseriatus (Wagler, 1830) -- valid -- Central Plateau Dusky Rattlesnake, Víbora-cascabel transvolcánica, Western Dusky Rattlesnake
  Crotalus triseriatus armstrongi Campbell, 1979 -- invalid
  Crotalus triseriatus triseriatus (Wagler, 1830) -- invalid
  Crotalus unicolor Van Lidth de Jeude, 1887 -- invalid -- Aruba Island Rattlesnake
  Crotalus urutu Liais, 1872 -- invalid
  Crotalus viridis (Rafinesque, 1818) -- valid -- Prairie Rattlesnake, Víbora-cascabel occidental, Western Rattlesnake
  Crotalus viridis abyssus Klauber, 1930 -- invalid -- Grand Canyon Rattlesnake
  Crotalus viridis caliginis Klauber, 1949 -- invalid
  Crotalus viridis cerberus (Coues in Wheeler, 1875) -- invalid -- Arizona Black Rattlesnake
  Crotalus viridis concolor Woodbury, 1929 -- invalid -- Midget Faded Rattlesnake
  Crotalus viridis helleri Meek, 1905 -- invalid -- Southern Pacific Rattlesnake
  Crotalus viridis lutosus Klauber, 1930 -- invalid -- Great Basin Rattlesnake
  Crotalus viridis nuntius Klauber, 1935 -- valid -- Hopi Rattlesnake
  Crotalus viridis oreganus Holbrook, 1840 -- invalid -- Northern Pacific Rattlesnake
  Crotalus viridis viridis (Rafinesque, 1818) -- valid -- Prairie Rattlesnake
  Crotalus willardi Meek, 1905 -- valid -- Ridge-nosed Rattlesnake, Víbora-cascabel bigotuda
  Crotalus willardi amabilis Anderson, 1962 -- valid -- Del Nido Ridge-nosed Rattlesnake
  Crotalus willardi meridionalis Klauber, 1949 -- valid -- Southern Ridge-nosed Rattlesnake
  Crotalus willardi obscurus Harris and Simmons, 1974 -- valid -- Animas Ridge-nosed Rattlesnake, New Mexico Ridgenose Rattlesnake
  Crotalus willardi silus Klauber, 1949 -- valid -- Western Chihuahuan Ridge-nosed Rattlesnake
  Crotalus willardi willardi Meek, 1905 -- valid -- Arizona Ridgenose Rattlesnake
  Cyclotyphlops Bosch and Ineich, 1994 -- valid
  Cyclotyphlops deharvengi Bosch and Ineich, 1994 -- valid
  Cylindrophiidae Fitzinger, 1843 -- valid -- Asian Pipe Snakes
  Cylindrophis Wagler, 1828 -- valid -- Asian Pipe Snakes
  Cylindrophis aruensis Boulenger, 1920 -- valid
  Cylindrophis boulengeri Roux, 1911 -- valid
  Cylindrophis isolepis Boulenger, 1896 -- valid
  Cylindrophis lineatus Blanford, 1881 -- valid
  Cylindrophis maculatus (Linnaeus, 1758) -- valid
  Cylindrophis melanotus Wagler, 1828 -- valid
  Cylindrophis opisthorhodus Boulenger, 1897 -- valid
  Cylindrophis ruffus (Laurenti, 1768) -- valid
  Daboia Gray, 1842 -- valid
  Daboia russelii (Shaw and Nodder, 1797) -- valid -- Russel's Viper
  Daboia russelii russelii (Shaw and Nodder, 1797) -- invalid
  Daboia russelii siamensis (M. A. Smith, 1917) -- invalid
  Deinagkistrodon Gloyd, 1979 -- valid
  Deinagkistrodon acutus (Günther, 1888) -- valid -- Chinese Moccasin, Five-pacer Viper, Hundred-pace Viper
  Echis Merrem, 1820 -- valid
  Echis carinatus (Schneider, 1801) -- valid -- Phoorsa, Saw-scaled Viper
  Echis carinatus astolae Mertens, 1970 -- invalid
  Echis carinatus carinatus (Schneider, 1801) -- valid
  Echis carinatus multisquamatus Cherlin, 1981 -- invalid
  Echis carinatus sinhaleyus Deraniyagala, 1951 -- invalid
  Echis carinatus sochureki Stemmler, 1969 -- valid
  Echis coloratus Günther, 1878 -- valid -- Palestine Saw-scaled Viper
  Echis hughesi Cherlin, 1990 -- valid -- Hughes' Saw-scaled Viper
  Echis jogeri Cherlin, 1990 -- valid -- Joger's Saw-scaled Viper
  Echis leucogaster Roman, 1972 -- valid -- Roman's Saw-scaled Viper
  Echis megalocephalus Cherlin, 1990 -- valid -- Cherlin's Saw-scaled Viper, Large-headed Carpet Viper
  Echis ocellatus Stemmler, 1970 -- valid -- African Saw-scaled Viper, West African Carpet Viper
  Echis pyramidum (Geoffroy de St-Hilaire in Savigny, 1827) -- valid -- Egyptian Saw-scaled Viper, North-East African Carpet Viper
  Echis pyramidum aliaborri Drews and Sacherer, 1974 -- invalid
  Echis pyramidum leakeyi Stemmler and Sochurek, 1969 -- valid
  Echis pyramidum pyramidum (Geoffroy de St-Hilaire in Savigny, 1827) -- valid
  Epicrates Wagler, 1830 -- valid -- Greater Antillean Boas, Rainbow Boas, West Indian Boas
  Epicrates angulifer Bibron, 1840 -- invalid -- Cuban Boa
  Epicrates cenchria (Linnaeus, 1758) -- valid -- Rainbow Boa
  Epicrates cenchria alvarezi Abalos, Baez and Nader, 1964 -- invalid
  Epicrates cenchria assisi Machado, 1945 -- invalid
  Epicrates cenchria barbouri Stall, 1938 -- invalid
  Epicrates cenchria cenchria (Linnaeus, 1758) -- invalid
  Epicrates cenchria crassus Cope, 1862 -- invalid
  Epicrates cenchria gaigei Stull, 1938 -- invalid
  Epicrates cenchria hygrophilus Amaral, 1935 -- invalid
  Epicrates cenchria maurus Gray, 1849 -- invalid -- Rainbow Boa
  Epicrates cenchria polylepis Amaral, 1935 -- invalid
  Epicrates chrysogaster (Cope, 1871) -- invalid
  Epicrates chrysogaster chrysogaster (Cope, 1871) -- invalid
  Epicrates chrysogaster relicquus Barbour and Shreve, 1935 -- invalid
  Epicrates chrysogaster schwartzi Buden, 1975 -- invalid
  Epicrates exsul Netting and Goin, 1944 -- invalid
  Epicrates fordii (Günther, 1861) -- invalid
  Epicrates fordii agametus Sheplan and Schwartz, 1974 -- invalid
  Epicrates fordii fordii (Günther, 1861) -- invalid
  Epicrates fordii manototus Schwartz, 1979 -- invalid
  Epicrates gracilis (Fischer, 1888) -- invalid
  Epicrates gracilis gracilis (Fischer, 1888) -- invalid
  Epicrates gracilis hapalus Sheplan and Schwartz, 1974 -- invalid
  Epicrates inornatus (Reinhardt, 1843) -- invalid -- Puerto Rican Boa
  Epicrates monensis Zenneck, 1898 -- invalid -- Mona Boa
  Epicrates monensis granti Stull, 1933 -- invalid -- Virgin Island Tree Boa
  Epicrates monensis monensis Zenneck, 1898 -- invalid -- Mona Boa
  Epicrates striatus (Fischer, 1856) -- invalid
  Epicrates striatus ailurus Sheplan and Schwartz, 1974 -- invalid
  Epicrates striatus exagistus Sheplan and Schwartz, 1974 -- invalid
  Epicrates striatus fosteri Barbour, 1941 -- invalid
  Epicrates striatus fowleri Sheplan and Schwartz, 1974 -- invalid
  Epicrates striatus mccraniei Sheplan and Schwartz, 1974 -- invalid
  Epicrates striatus striatus (Fischer, 1856) -- invalid
  Epicrates striatus strigilatus (Cope, 1862) -- invalid
  Epicrates striatus warreni Sheplan and Schwartz, 1974 -- invalid
  Epicrates subflavus Stejneger, 1901 -- invalid -- Jamaican Boa
  Eristicophis Alcock and Finn, 1897 -- valid
  Eristicophis macmahonii Alcock and Finn, 1897 -- valid -- Asian Sand Viper, McMahons Desert Viper
  Erycinae Bonaparte, 1831 -- invalid -- Old World Sand Boas
  Eryx Daudin, 1803 -- valid -- Old World Sand Boas
  Eryx colubrinus (Linnaeus, 1758) -- valid
  Eryx conicus (Schneider, 1801) -- valid
  Eryx elegans (Gray, 1849) -- valid
  Eryx jaculus (Linnaeus, 1758) -- valid
  Eryx jayakari Boulenger, 1888 -- valid
  Eryx johnii (Russell, 1801) -- valid
  Eryx miliaris (Pallas, 1773) -- valid
  Eryx muelleri (Boulenger, 1892) -- valid
  Eryx somalicus Scortecci, 1939 -- valid
  Eryx tataricus (Lichtenstein, 1823) -- valid
  Eryx tataricus speciosus Carevskij, 1916 -- valid
  Eryx tataricus tataricus (Lichtenstein, 1823) -- valid
  Eryx tataricus vittatus Chernov, 1959 -- invalid
  Eryx whitakeri Das, 1991 -- valid
  Eunectes Wagler, 1830 -- valid -- Anacondas
  Eunectes barbouri Dunn and Conant, 1936 -- invalid
  Eunectes deschauenseei Dunn and Conant, 1936 -- valid
  Eunectes murinus (Linnaeus, 1758) -- valid
  Eunectes murinus gigas (Latreille, 1801) -- invalid
  Eunectes murinus murinus (Linnaeus, 1758) -- invalid
  Eunectes notaeus Cope, 1862 -- valid
  Exiliboa Bogert, 1968 -- valid
  Exiliboa placata Bogert, 1968 -- valid -- Boa-enana oaxaqueña
  Glauconia dissecta Cope, 1896 -- invalid
  Gloydius Hoge and Romano-Hoge, 1981 -- valid
  Gloydius blomhoffii (H. Boie, 1826) -- valid -- Mamushi
  Gloydius blomhoffii blomhoffii (H. Boie, 1826) -- valid
  Gloydius blomhoffii brevicaudus (Stejneger, 1907) -- invalid
  Gloydius blomhoffii dubitatus (Gloyd, 1977) -- valid
  Gloydius blomhoffii siniticus (Gloyd, 1977) -- invalid
  Gloydius halys (Pallas, 1776) -- valid -- Halys Pit Viper
  Gloydius halys boehmei (Nilson, 1983) -- valid -- Böhme's Pitviper
  Gloydius halys caraganus (Eichwald, 1831) -- valid -- Karaganda Pitviper
  Gloydius halys cognatus (Gloyd, 1977) -- valid -- Alashan Pitviper
  Gloydius halys halys (Pallas, 1776) -- valid -- Siberian Pit Viper
  Gloydius halys mogoi (Bour, 1993) -- valid
  Gloydius himalayanus (Günther, 1864) -- valid -- Himalayan Pitviper
  Gloydius intermedius (Strauch, 1868) -- valid -- Central Asian Pitviper
  Gloydius intermedius caucasicus (Nikolsky, 1916) -- invalid
  Gloydius intermedius intermedius (Strauch, 1868) -- invalid
  Gloydius intermedius stejnegeri (Rendahl, 1933) -- invalid
  Gloydius monticola (Werner, 1922) -- valid -- Likiang Pitviper
  Gloydius saxatilis (Emelianov, 1937) -- valid
  Gloydius shedaoensis (Zhao, 1979) -- valid -- Shedao Island Pitviper
  Gloydius strauchi (Bedriaga, 1912) -- valid -- Strauch's Pitviper
  Gloydius ussuriensis (Emelianov, 1929) -- valid -- Ussuri Mamushi
  Gongylophis Wagler, 1830 -- invalid
  Gongylophis colubrinus (Linnaeus, 1758) -- invalid
  Gongylophis conicus (Schneider, 1801) -- invalid
  Gongylophis muelleri Boulenger, 1892 -- invalid
  Helminthophis Peters, 1860 -- valid
  Helminthophis flavoterminatus (Peters, 1857) -- valid
  Helminthophis frontalis (Peters, 1860) -- valid
  Helminthophis praeocularis Amaral, 1924 -- valid
  Hypnale Fitzinger, 1843 -- valid
  Hypnale hypnale (Merrem, 1820) -- valid -- Hump-nosed Moccasin
  Hypnale nepa (Laurenti, 1768) -- valid -- Sri Lanka Humpnose Viper
  Hypnale walli (Gloyd, 1977) -- invalid
  Lacertilia -- invalid -- lagarto, Lizards
  Lachesis Daudin, 1803 -- valid
  Lachesis melanocephala Solórzano and Cerdas, 1986 -- valid -- Black-headed Bushmaster
  Lachesis muta (Linnaeus, 1766) -- valid -- Bushmaster, South American Bushmaster
  Lachesis muta muta (Linnaeus, 1766) -- invalid
  Lachesis muta rhombeata (Wied-Neuwied, 1824) -- invalid
  Lachesis stenophrys Cope, 1876 -- valid -- Central American Bushmaster
  Leiopython Hubrecht, 1879 -- valid
  Leiopython albertisii (Peters and Doria, 1878) -- valid
  Leiopython gracilis Hubrecht, 1879 -- invalid
  Leptotyphlopidae Stejneger, 1892 -- valid -- Slender Blind Snakes, Thread Snakes, Threadsnakes
  Leptotyphlops Fitzinger, 1843 -- valid -- Slender Blind Snakes, Threadsnakes
  Leptotyphlops affinis (Boulenger, 1884) -- valid
  Leptotyphlops albifrons (Wagler, 1824) -- valid
  Leptotyphlops albipunctus (Jan, 1861) -- valid
  Leptotyphlops albiventer Hallermann and Rödel, 1995 -- valid
  Leptotyphlops anthracinus Bailey, 1946 -- valid
  Leptotyphlops asbolepis Thomas, McDiarmid and Thompson, 1985 -- valid
  Leptotyphlops australis Freiberg and Orejas-Miranda, 1968 -- valid
  Leptotyphlops bicolor (Jan, 1860) -- valid
  Leptotyphlops bilineatus (Schlegel, 1839) -- valid
  Leptotyphlops blanfordii (Boulenger, 1890) -- valid
  Leptotyphlops borapeliotes Vanzolini, 1996 -- valid
  Leptotyphlops borrichianus (Degerbl, 1923) -- valid
  Leptotyphlops boulengeri (Boettger, 1913) -- valid
  Leptotyphlops brasiliensis Laurent, 1949 -- valid
  Leptotyphlops bressoni Taylor, 1939 -- valid -- Serpiente-lombriz michoacana
  Leptotyphlops brevicaudus (Bocage, 1887) -- valid
  Leptotyphlops brevissimus Shreve, 1964 -- valid
  Leptotyphlops broadleyi Wallach and Hahn, 1997 -- valid
  Leptotyphlops burii (Boulenger, 1905) -- valid
  Leptotyphlops cairi (Duméril and Bibron, 1844) -- valid
  Leptotyphlops calypso Thomas, McDiarmid and Thompson, 1985 -- valid
  Leptotyphlops collaris Hoogmoed, 1977 -- valid
  Leptotyphlops columbi Klauber, 1939 -- valid
  Leptotyphlops conjunctus (Jan, 1861) -- valid
  Leptotyphlops conjunctus conjunctus (Jan, 1861) -- valid
  Leptotyphlops conjunctus incognitus Broadley and Watson, 1976 -- valid
  Leptotyphlops conjunctus latirostris (Sternfeld, 1912) -- valid
  Leptotyphlops conjunctus lepezi (Boulenger, 1901) -- valid
  Leptotyphlops cupinensis Bailey and Carvalho, 1946 -- valid
  Leptotyphlops debilis (Chabanaud, 1918) -- valid
  Leptotyphlops diaplocius Orejas-Miranda, 1969 -- valid
  Leptotyphlops dimidiatus (Jan, 1861) -- valid
  Leptotyphlops dissimilis (Bocage, 1886) -- valid
  Leptotyphlops distanti (Boulenger, 1892) -- valid
  Leptotyphlops drewesi Wallach, 1996 -- valid
  Leptotyphlops dugandi Dunn, 1944 -- valid
  Leptotyphlops dulcis (Baird and Girard, 1853) -- valid -- Serpiente-lombriz texana, Texas Slender Blind Snake, Texas Threadsnake
  Leptotyphlops dulcis dissectus (Cope, 1896) -- invalid -- New Mexico Blind Snake
  Leptotyphlops dulcis dulcis (Baird and Girard, 1853) -- valid -- Plains Blind Snake
  Leptotyphlops dulcis myopicus (Garman, 1884) -- valid
  Leptotyphlops emini (Boulenger, 1890) -- valid
  Leptotyphlops filiformis (Boulenger, 1899) -- valid
  Leptotyphlops fitzingeri (Jan, 1861) -- valid
  Leptotyphlops gestri (Boulenger, 1906) -- valid
  Leptotyphlops goudotii (Duméril and Bibron, 1844) -- valid
  Leptotyphlops goudotii ater Taylor, 1939 -- valid
  Leptotyphlops goudotii goudotii (Duméril and Bibron, 1844) -- valid
  Leptotyphlops goudotii magnamaculatus Taylor, 1940 -- valid
  Leptotyphlops goudotii phenops (Cope, 1875) -- valid
  Leptotyphlops gracilior (Boulenger, 1910) -- valid
  Leptotyphlops guayaquilensis Orejas-Miranda and Peters, 1970 -- valid
  Leptotyphlops hamulirostris (Nikolsky, 1907) -- valid
  Leptotyphlops humilis (Baird and Girard, 1853) -- valid -- Serpiente-lombriz occidental, Western Slender Blind Snake, Western Threadsnake
  Leptotyphlops humilis boettgeri (Werner, 1899) -- valid
  Leptotyphlops humilis cahuilae Klauber, 1931 -- valid -- Desert Blind Snake
  Leptotyphlops humilis dugesii (Bocourt, 1881) -- valid
  Leptotyphlops humilis humilis (Baird and Girard, 1853) -- valid -- Southwestern Blind Snake
  Leptotyphlops humilis levitoni Murphy, 1975 -- valid
  Leptotyphlops humilis lindsayi Murphy, 1975 -- valid
  Leptotyphlops humilis segregus Klauber, 1939 -- valid -- Trans-pecos Blind Snake
  Leptotyphlops humilis tenuiculus (Garman, 1884) -- valid
  Leptotyphlops humilis utahensis Tanner, 1938 -- valid -- Utah Blind Snake
  Leptotyphlops joshuai Dunn, 1944 -- valid
  Leptotyphlops koppesi Amaral, 1955 -- valid
  Leptotyphlops labialis (Sternfeld, 1908) -- valid
  Leptotyphlops leptepileptus Thomas, McDiarmid and Thompson, 1985 -- valid
  Leptotyphlops longicaudus (Peters, 1854) -- valid
  Leptotyphlops macrolepis (Peters, 1857) -- valid
  Leptotyphlops macrops Broadley and Wallach, 1996 -- valid
  Leptotyphlops macrorhynchus (Jan, 1860) -- valid
  Leptotyphlops macrurus (Boulenger, 1903) -- valid
  Leptotyphlops maximus Loveridge, 1932 -- valid -- Serpiente-lombriz gigante
  Leptotyphlops melanotermus (Cope, 1862) -- valid
  Leptotyphlops melanurus Schmidt and Walker, 1943 -- valid
  Leptotyphlops munoai Orejas-Miranda, 1961 -- valid
  Leptotyphlops narirostris (Peters, 1867) -- valid
  Leptotyphlops narirostris boueti (Chabanaud, 1917) -- valid
  Leptotyphlops narirostris narirostris (Peters, 1867) -- valid
  Leptotyphlops nasalis Taylor, 1940 -- valid
  Leptotyphlops natatrix (Andersson, 1937) -- valid
  Leptotyphlops nicefori Dunn, 1946 -- valid
  Leptotyphlops nigricans (Schlegel, 1839) -- valid
  Leptotyphlops nursii (Anderson, 1896) -- valid
  Leptotyphlops occidentalis FitzSimons, 1962 -- valid
  Leptotyphlops perreti Roux-Estève, 1979 -- valid
  Leptotyphlops peruvianus Orejas-Miranda, 1969 -- valid
  Leptotyphlops pyrites Thomas, 1965 -- valid
  Leptotyphlops reticulatus (Boulenger, 1906) -- valid
  Leptotyphlops rostratus (Bocage, 1886) -- valid
  Leptotyphlops rubrolineatus (Werner, 1901) -- valid
  Leptotyphlops rufidorsus Taylor, 1940 -- valid
  Leptotyphlops salgueiroi Amaral, 1955 -- valid
  Leptotyphlops scutifrons (Peters, 1854) -- valid
  Leptotyphlops septemstriatus (Schneider, 1801) -- valid
  Leptotyphlops signatus (Jan, 1861) -- valid
  Leptotyphlops striatulus Smith and Laufe, 1945 -- valid
  Leptotyphlops subcrotillus Klauber, 1939 -- valid
  Leptotyphlops sundewalli (Jan, 1861) -- valid
  Leptotyphlops teaguei Orejas-Miranda, 1964 -- valid
  Leptotyphlops telloi Broadley and Watson, 1976 -- valid
  Leptotyphlops tesselatus (Tschudi, 1845) -- valid
  Leptotyphlops tricolor Orejas-Miranda and Zug, 1974 -- valid
  Leptotyphlops undecimstriatus (Schlegel, 1839) -- valid
  Leptotyphlops unguirostris (Boulenger, 1902) -- valid
  Leptotyphlops variabilis (Scortecci, 1928) -- valid
  Leptotyphlops vellardi Laurent, 1984 -- valid
  Leptotyphlops weyrauchi Orejas-Miranda, 1964 -- valid
  Leptotyphlops wilsoni Hahn, 1978 -- valid
  Liasis Gray, 1842 -- valid
  Liasis albertisii Peters and Doria, 1878 -- invalid
  Liasis boa (Schlegel, 1837) -- invalid
  Liasis childreni Gray, 1842 -- invalid
  Liasis fuscus Peters, 1873 -- valid
  Liasis fuscus albertisii Peters and Doria, 1878 -- invalid
  Liasis mackloti Duméril and Bibron, 1844 -- valid
  Liasis mackloti mackloti Duméril and Bibron, 1844 -- valid
  Liasis mackloti savuensis Brongersma, 1956 -- valid
  Liasis olivaceus Gray, 1842 -- valid
  Liasis olivaceus barroni Smith, 1981 -- valid
  Liasis olivaceus olivaceus Gray, 1842 -- valid
  Liasis stimsoni Smith, 1985 -- invalid
  Lichanura Cope, 1861 -- valid
  Lichanura trivirgata Cope, 1861 -- valid -- Boa solocuate, Rosy Boa
  Lichanura trivirgata gracia Klauber, 1931 -- invalid
  Lichanura trivirgata roseofusca Cope, 1868 -- invalid
  Lichanura trivirgata trivirgata Cope, 1861 -- invalid
  Liotyphlops Peters, 1881 -- valid
  Liotyphlops albirostris (Peters, 1857) -- valid
  Liotyphlops anops (Cope, 1899) -- valid
  Liotyphlops argaleus Dixon and Kofron, 1984 -- valid
  Liotyphlops beui (Amaral, 1924) -- valid
  Liotyphlops schubarti Vanzolini, 1948 -- valid
  Liotyphlops ternetzii (Boulenger, 1896) -- valid
  Liotyphlops wilderi (Garman, 1883) -- valid
  Lisalia albertisi (Peters and Doria, 1878) -- invalid
  Loxocemidae Cope, 1861 -- valid -- Mexican Pythons
  Loxocemus Cope, 1861 -- valid
  Loxocemus bicolor Cope, 1861 -- valid -- Serpiente chatilla
  Macrovipera Reuss, 1927 -- valid
  Macrovipera deserti (J. Anderson, 1892) -- invalid
  Macrovipera lebetina (Linnaeus, 1758) -- valid -- Levantine Viper
  Macrovipera lebetina chernovi (Chikin and Szczerbak, 1992) -- valid
  Macrovipera lebetina lebetina (Linnaeus, 1758) -- valid
  Macrovipera lebetina obtusa (Dwigubsky, 1832) -- valid
  Macrovipera lebetina transmediterranea (Nilson and Andrén, 1988) -- valid
  Macrovipera lebetina turanica (Chernov, 1940) -- valid
  Macrovipera mauritanica (A. M. C. Duméril and Bibron, 1848) -- invalid
  Macrovipera schweizeri (Werner, 1935) -- valid
  Melanophidium Günther, 1864 -- valid
  Melanophidium bilineatum Beddome, 1870 -- valid
  Melanophidium punctatum Beddome, 1871 -- valid
  Melanophidium wynaudense (Beddome, 1863) -- valid
  Montatheris Broadley, 1996 -- valid
  Montatheris hindii (Boulenger, 1910) -- valid -- Kenya Montane Viper
  Morelia Gray, 1842 -- valid
  Morelia albertisii (Peters and Doria, 1878) -- invalid
  Morelia amethistina (Schneider, 1801) -- valid
  Morelia boeleni (Brongersma, 1953) -- valid
  Morelia bredli (Gow, 1981) -- valid
  Morelia carinata (Smith, 1981) -- valid
  Morelia mackloti (Duméril and Bibron, 1844) -- invalid
  Morelia oenpelliensis (Gow, 1977) -- valid
  Morelia olivacea (Gray, 1842) -- invalid
  Morelia spilota (Lacépède, 1804) -- valid
  Morelia spilota cheynei Wells and Wellington, 1984 -- valid
  Morelia spilota imbricata (Smith, 1981) -- valid
  Morelia spilota mcdowelli Wells and Wellington, 1984 -- valid
  Morelia spilota metcalfei Wells and Wellington, 1984 -- valid
  Morelia spilota spilota (Lacépède, 1804) -- valid
  Morelia spilota variegata Gray, 1842 -- valid
  Morelia viridis (Schlegel, 1872) -- valid
  Ophryacus Cope, 1887 -- valid
  Ophryacus melanurus (Müller, 1924) -- invalid
  Ophryacus undulatus (Jan, 1859) -- valid -- Mexican Horned Pit Viper, Slender-horned Pitviper
  Ovophis Burger, 1981 -- valid
  Ovophis chaseni (M. A. Smith, 1931) -- invalid
  Ovophis monticola (Günther, 1864) -- valid -- Chinese Mountain Pit Viper
  Ovophis monticola convictus (Stoliczka, 1870) -- invalid
  Ovophis monticola makazayazaya (Takahashi, 1922) -- invalid
  Ovophis monticola monticola (Günther, 1864) -- invalid
  Ovophis monticola zayuensis (Jiang, 1977) -- invalid
  Ovophis okinavensis (Boulenger, 1892) -- valid -- Okinawa Pitviper, Ryukyu Island Pit Viper
  Platyplectrurus Günther, 1868 -- valid
  Platyplectrurus madurensis Beddome, 1877 -- valid
  Platyplectrurus madurensis madurensis Beddome, 1877 -- valid
  Platyplectrurus madurensis ruhanae Deraniyagala, 1954 -- valid
  Platyplectrurus trilineatus (Beddome, 1867) -- valid
  Plectrurus Duméril, 1851 -- valid
  Plectrurus aureus Beddome, 1880 -- valid
  Plectrurus canaricus (Beddome, 1870) -- valid
  Plectrurus guentheri Beddome, 1863 -- valid
  Plectrurus perrotetii Duméril, 1851 -- valid
  Porthidium Cope, 1871 -- valid
  Porthidium dunni (Hartweg and Oliver, 1938) -- valid -- Dunn's Hognose Viper, Nauyaca-nariz de cerdo oxaqueña
  Porthidium hespere (Campbell, 1976) -- valid -- Nauyaca-nariz de cerdo de Tecomán, Western Hognose Viper
  Porthidium lansbergii (Schlegel, 1841) -- valid
  Porthidium lansbergii arcosae Schätti and Kramer, 1993 -- invalid
  Porthidium lansbergii hutmanni (Sandner-Montilla, 1989) -- valid
  Porthidium lansbergii lansbergii (Schlegel, 1841) -- valid
  Porthidium lansbergii rozei (Peters, 1968) -- valid
  Porthidium melanurum (Müller, 1924) -- invalid -- Nauyaca-nariz de cerdo cornuda
  Porthidium nasutum (Bocourt, 1868) -- valid -- Hognosed Pit Viper, Nauyaca-nariz de cerdo narigona
  Porthidium ophryomegas (Bocourt, 1868) -- valid -- Slender Hognose Viper
  Porthidium volcanicum Solórzano, 1995 -- valid
  Porthidium yucatanicum (H. M. Smith, 1941) -- valid -- Nauyaca-nariz de cerdo yucateca
  Proatheris Broadley, 1996 -- valid
  Proatheris superciliaris (Peters, 1855) -- valid -- Domino-bellied Viper, Lowland Swamp Viper, Lowland Viper
  Pseudocerastes Boulenger, 1896 -- valid
  Pseudocerastes persicus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Persian Horned Viper
  Pseudocerastes persicus fieldi K. P. Schmidt, 1930 -- invalid
  Pseudocerastes persicus persicus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid
  Pseudotyphlops Schlegel, 1839 -- valid
  Pseudotyphlops philippinus (Müller, 1832) -- valid
  Python Daudin, 1803 -- valid -- Pythons
  Python anchietae Bocage, 1887 -- valid
  Python boeleni (Brongersma, 1953) -- invalid
  Python curtus Schlegel, 1872 -- valid
  Python curtus breitensteini Steindachner, 1880 -- valid
  Python curtus brongersmai Stull, 1935 -- valid
  Python curtus curtus Schlegel, 1872 -- valid
  Python molurus (Linnaeus, 1758) -- valid -- Indian Python
  Python molurus bivittatus Kuhl, 1820 -- valid
  Python molurus molurus (Linnaeus, 1758) -- valid
  Python regius (Shaw, 1802) -- valid
  Python reticulatus (Schneider, 1801) -- valid -- Reticulated Python
  Python sebae (Gmelin, 1788) -- valid
  Python sebae natalensis Smith, 1833 -- valid
  Python sebae sebae (Gmelin, 1788) -- valid
  Python timoriensis (Peters, 1876) -- valid
  Pythonidae Fitzinger, 1826 -- valid -- Pythons
  Ramphotyphlops Fitzinger, 1843 -- valid -- Long Tailed Blindsnakes, Long-tailed Blind Snakes
  Ramphotyphlops acuticaudus (Peters, 1877) -- valid -- Palau Blind Snake, Palau Blindsnake
  Ramphotyphlops affinis (Boulenger, 1889) -- valid
  Ramphotyphlops albiceps (Boulenger, 1898) -- valid
  Ramphotyphlops angusticeps (Peters, 1877) -- valid
  Ramphotyphlops australis (Gray, 1845) -- valid -- Southern Blindsnake
  Ramphotyphlops batillus (Waite, 1894) -- valid
  Ramphotyphlops bituberculatus (Peters, 1863) -- valid
  Ramphotyphlops braminus (Daudin, 1803) -- valid -- Brahminy Blind Snake, Brahminy Blindsnake, Serpiente-ciega de Braminy
  Ramphotyphlops broomi (Boulenger, 1898) -- valid
  Ramphotyphlops centralis Storr, 1984 -- valid
  Ramphotyphlops chamodracaena Ingram and Covacevich, 1993 -- valid
  Ramphotyphlops cumingii (Gray, 1845) -- valid
  Ramphotyphlops depressus (Peters, 1880) -- valid
  Ramphotyphlops diversus (Waite, 1894) -- valid
  Ramphotyphlops endoterus (Waite, 1918) -- valid
  Ramphotyphlops erycinus (Werner, 1901) -- valid
  Ramphotyphlops exocoeti (Boulenger, 1887) -- valid
  Ramphotyphlops flaviventer (Peters, 1864) -- valid
  Ramphotyphlops grypus (Waite, 1918) -- valid
  Ramphotyphlops guentheri (Peters, 1865) -- valid
  Ramphotyphlops hamatus Storr, 1981 -- valid
  Ramphotyphlops howi Storr, 1983 -- valid
  Ramphotyphlops kimberleyensis Storr, 1981 -- valid
  Ramphotyphlops leptosomus Robb, 1972 -- valid
  Ramphotyphlops leucoproctus (Boulenger, 1889) -- valid
  Ramphotyphlops ligatus (Peters, 1879) -- valid
  Ramphotyphlops lineatus (Schlegel, 1839) -- valid
  Ramphotyphlops lorenzi (Werner, 1909) -- valid
  Ramphotyphlops margaretae Storr, 1981 -- valid
  Ramphotyphlops micromma Storr, 1981 -- valid
  Ramphotyphlops minimus (Kinghorn, 1929) -- valid
  Ramphotyphlops multilineatus (Schlegel, 1839) -- valid
  Ramphotyphlops nigrescens (Gray, 1845) -- valid
  Ramphotyphlops olivaceus (Gray, 1845) -- valid
  Ramphotyphlops pilbarensis Aplin and Donnellan, 1993 -- valid
  Ramphotyphlops pinguis (Waite, 1897) -- valid
  Ramphotyphlops polygrammicus (Schlegel, 1839) -- valid
  Ramphotyphlops polygrammicus brongersmai (Mertens, 1929) -- valid
  Ramphotyphlops polygrammicus elberti (Roux, 1911) -- valid
  Ramphotyphlops polygrammicus florensis (Boulenger, 1897) -- valid
  Ramphotyphlops polygrammicus polygrammicus (Schlegel, 1839) -- valid
  Ramphotyphlops polygrammicus undecimlineatus (Mertens, 1927) -- valid
  Ramphotyphlops proximus (Waite, 1893) -- valid
  Ramphotyphlops silvia Ingram and Covacevich, 1993 -- valid
  Ramphotyphlops similis (Brongersma, 1934) -- valid
  Ramphotyphlops supranasalis (Brongersma, 1934) -- valid
  Ramphotyphlops tovelli (Loveridge, 1945) -- valid
  Ramphotyphlops troglodytes Storr, 1981 -- valid
  Ramphotyphlops unguirostris (Peters, 1867) -- valid
  Ramphotyphlops waitii (Boulenger, 1895) -- valid
  Ramphotyphlops wiedii (Peters, 1867) -- valid
  Ramphotyphlops willeyi (Boulenger, 1900) -- valid
  Ramphotyphlops yampiensis Storr, 1981 -- valid
  Ramphotyphlops yirrikalae (Kinghorn, 1942) -- valid
  Rena dulcis Baird and Girard, 1853 -- invalid
  Rena humilis Baird and Girard, 1853 -- invalid
  Reptilia Laurenti, 1768 -- valid -- répteis, reptiles, Reptiles
  Rhamphotyphlops acuticaudus (Peters, 1877) -- invalid
  Rhamphotyphlops braminus (Daudin, 1803) -- invalid
  Rhinoleptus Orejas-Miranda, Roux-Estève and Guibé, 1970 -- valid
  Rhinoleptus koniagui (Villiers, 1956) -- valid
  Rhinophis Hemprich, 1820 -- valid
  Rhinophis blythii Kelaart, 1853 -- valid
  Rhinophis dorsimaculatus Deraniyagala, 1941 -- valid
  Rhinophis drummondhayi Wall, 1921 -- valid
  Rhinophis fergusonianus Boulenger, 1896 -- valid
  Rhinophis homolepis (Hemprich, 1820) -- valid
  Rhinophis oxyrynchus (Schneider, 1801) -- valid
  Rhinophis philippinus (Cuvier, 1829) -- valid
  Rhinophis porrectus Wall, 1921 -- valid
  Rhinophis punctatus Müller, 1832 -- valid
  Rhinophis sanguineus Beddome, 1863 -- valid
  Rhinophis travancoricus Boulenger, 1893 -- valid
  Rhinophis tricolorata Deraniyagala, 1975 -- valid
  Rhinotyphlops Fitzinger, 1843 -- valid
  Rhinotyphlops acutus (Duméril and Bibron, 1844) -- valid
  Rhinotyphlops anomalus (Bocage, 1873) -- valid
  Rhinotyphlops ataeniatus (Boulenger, 1912) -- valid
  Rhinotyphlops boylei (FitzSimons, 1932) -- valid
  Rhinotyphlops caecus (Duméril, 1856) -- valid
  Rhinotyphlops crossii (Boulenger, 1893) -- valid
  Rhinotyphlops debilis Joger, 1990 -- valid
  Rhinotyphlops erythraeus (Scortecci, 1928) -- valid
  Rhinotyphlops feae (Boulenger, 1906) -- valid
  Rhinotyphlops gracilis (Sternfeld, 1910) -- valid
  Rhinotyphlops graueri (Sternfeld, 1912) -- valid
  Rhinotyphlops kibarae (Witte, 1953) -- valid
  Rhinotyphlops lalandei (Schlegel, 1839) -- valid
  Rhinotyphlops leucocephalus (Parker, 1930) -- valid
  Rhinotyphlops lumbriciformis (Peters, 1874) -- valid
  Rhinotyphlops newtonii (Bocage, 1890) -- valid
  Rhinotyphlops pallidus (Cope, 1869) -- valid
  Rhinotyphlops praeocularis (Stejneger, 1894) -- valid
  Rhinotyphlops rufescens (Chabanaud, 1916) -- valid
  Rhinotyphlops schinzi (Boettger, 1887) -- valid
  Rhinotyphlops schlegelii (Bianconi, 1847) -- valid
  Rhinotyphlops schlegelii brevis (Scortecci, 1929) -- valid
  Rhinotyphlops schlegelii mucruso (Peters, 1854) -- valid
  Rhinotyphlops schlegelii petersii (Bocage, 1873) -- valid
  Rhinotyphlops schlegelii schlegelii (Bianconi, 1847) -- valid
  Rhinotyphlops scorteccii (Gans and Laurent, 1965) -- valid
  Rhinotyphlops simoni (Boettger, 1879) -- valid
  Rhinotyphlops somalicus (Boulenger, 1895) -- valid
  Rhinotyphlops stejnegeri (Loveridge, 1931) -- valid
  Rhinotyphlops sudanensis (Schmidt, 1923) -- valid
  Rhinotyphlops unitaeniatus (Peters, 1878) -- valid
  Rhinotyphlops wittei Roux-Estève, 1974 -- valid
  Sanzinia Gray, 1849 -- valid
  Sanzinia madagascariensis (Duméril and Bibron, 1844) -- valid
  Sauria -- invalid
  Scolecophidia Cope, 1864 -- valid
  Serpentes Linnaeus, 1758 -- valid -- cobra, serpente, serpents, Snakes
  Sistrurus Garman, 1884 -- valid -- Massasaugas, Pigmy Rattlesnakes, Pygmy Rattlesnakes
  Sistrurus catenatus (Rafinesque-Schmaltz, 1818) -- valid -- Massasauga, Víbora-cascabel pigmea-norteña
  Sistrurus catenatus catenatus (Rafinesque-Schmaltz, 1818) -- invalid -- Eastern Massasauga
  Sistrurus catenatus edwardsii (Baird and Girard, 1853) -- invalid -- Desert Massasauga
  Sistrurus catenatus tergeminus (Say in James, 1823) -- invalid -- Western Massasauga
  Sistrurus miliarius (Linnaeus, 1766) -- valid -- Pigmy Rattlesnake, Pygmy Rattlesnake
  Sistrurus miliarius barbouri Gloyd, 1935 -- valid -- Dusky Pigmy Rattlesnake
  Sistrurus miliarius miliarius (Linnaeus, 1766) -- valid -- Carolina Pigmy Rattlesnake
  Sistrurus miliarius streckeri Gloyd, 1935 -- valid -- Western Pigmy Rattlesnake
  Sistrurus ravus (Cope, 1865) -- invalid -- Víbora-cascabel pigmea-mexicana
  Sistrurus ravus brunneus (Harris and Simmons, 1978) -- invalid
  Sistrurus ravus exiguus Campbell and Armstrong, 1979 -- invalid
  Sistrurus ravus ravus (Cope, 1865) -- invalid
  Squamata Oppel, 1811 -- valid -- Amphisbaenians, amphisbènes, lézards, Lizards, serpents, Snakes
  Teretrurus Beddome, 1886 -- valid
  Teretrurus sanguineus (Beddome, 1867) -- valid
  Tortrix bottae Blainville, 1835 -- invalid
  Trachyboa Peters, 1860 -- valid
  Trachyboa boulengeri Peracca, 1910 -- valid -- Northern Eyelash Boa
  Trachyboa gularis Peters, 1860 -- valid -- Southern Eyelash Boa
  Trimeresurus Lacépède, 1804 -- valid
  Trimeresurus albolabris Gray, 1842 -- valid -- White-lipped Pitviper, White-lipped Tree Viper
  Trimeresurus albolabris albolabris Gray, 1842 -- invalid
  Trimeresurus albolabris insularis Kramer, 1977 -- invalid
  Trimeresurus albolabris septentrionalis Kramer, 1977 -- invalid
  Trimeresurus borneensis (Peters, 1872) -- valid -- Borneo Pit Viper
  Trimeresurus brongersmai Hoge, 1969 -- valid -- Brongersma's Pit Viper
  Trimeresurus cantori (Blyth, 1846) -- valid -- Cantor's Pit Viper
  Trimeresurus cornutus M. A. Smith, 1930 -- invalid
  Trimeresurus elegans (Gray, 1849) -- invalid
  Trimeresurus erythrurus (Cantor, 1839) -- valid -- Bamboo Pitviper, Redtail Pitviper
  Trimeresurus fasciatus (Boulenger, 1896) -- valid -- Banded Pit Viper
  Trimeresurus flavomaculatus (Gray, 1842) -- valid -- Philippine Pitviper
  Trimeresurus flavomaculatus flavomaculatus (Gray, 1842) -- invalid
  Trimeresurus flavomaculatus halieus Griffin, 1910 -- invalid
  Trimeresurus flavomaculatus mcgregori Taylor, 1919 -- invalid
  Trimeresurus flavoviridis (Hallowell, 1861) -- invalid
  Trimeresurus gracilis Oshima, 1920 -- valid -- Kikuchi Habu
  Trimeresurus gramineus (Shaw, 1802) -- valid -- Common Bamboo Viper
  Trimeresurus hageni (Van Lidth de Jeude, 1886) -- valid -- Hagen's Pitviper, Indonesian Pit Viper
  Trimeresurus jerdonii Günther, 1875 -- invalid
  Trimeresurus jerdonii bourreti Klemmer, 1963 -- invalid
  Trimeresurus jerdonii jerdonii Günther, 1875 -- invalid
  Trimeresurus jerdonii xanthomelas Günther, 1889 -- invalid
  Trimeresurus kanburiensis M. A. Smith, 1943 -- valid -- Kanburi Pit Viper
  Trimeresurus karanshahi Orlov and Helfenberger, 1997 -- invalid
  Trimeresurus kaulbacki M. A. Smith, 1940 -- invalid
  Trimeresurus labialis Steindachner, 1867 -- valid -- Island Pit Viper, Nicobar Bamboo Pitviper
  Trimeresurus macrolepis Beddome, 1862 -- valid
  Trimeresurus macrops Kramer, 1977 -- valid -- Kramer's Pit Viper, Large-eyed Pitviper
  Trimeresurus malabaricus (Jerdon, 1854) -- valid -- Malabarian Pit Viper
  Trimeresurus mangshanensis Zhao, 1990 -- invalid
  Trimeresurus medoensis Zhao, 1977 -- valid -- Green Bamboo Leaf Pit Viper, Motuo Bamboo Pitviper
  Trimeresurus mucrosquamatus (Cantor, 1839) -- invalid
  Trimeresurus popeorum M. A. Smith, 1937 -- invalid
  Trimeresurus popeorum barati Regenass and Kramer, 1981 -- invalid
  Trimeresurus popeorum popeorum M. A. Smith, 1937 -- invalid
  Trimeresurus popeorum sabahi Regenass and Kramer, 1981 -- invalid
  Trimeresurus puniceus (F. Boie, 1827) -- valid -- Ashy Pit Viper, Flat-nosed Pitviper
  Trimeresurus purpureomaculatus (Gray, 1832) -- valid -- Mangrove Viper, Shore Pit Viper
  Trimeresurus purpureomaculatus andersoni Theobald, 1868 -- invalid
  Trimeresurus purpureomaculatus purpureomaculatus (Gray, 1832) -- invalid
  Trimeresurus schultzei Griffin, 1909 -- valid -- Schultze's Pit Viper
  Trimeresurus stejnegeri K. P. Schmidt, 1925 -- valid -- Chinese Green Tree Viper
  Trimeresurus stejnegeri chenbihuii Zhao, 1995 -- valid -- Chen's Bamboo Pitviper
  Trimeresurus stejnegeri stejnegeri K. P. Schmidt, 1925 -- valid -- Stejneger's Bamboo Pitviper
  Trimeresurus stejnegeri yunnanensis K. P. Schmidt, 1925 -- invalid
  Trimeresurus strigatus Gray, 1842 -- valid -- Horseshoe Pitviper
  Trimeresurus sumatranus (Raffles, 1822) -- valid -- Sumatra Pit Viper
  Trimeresurus sumatranus malcolmi Loveridge, 1938 -- invalid
  Trimeresurus sumatranus sumatranus (Raffles, 1822) -- invalid
  Trimeresurus tibetanus Huang, 1982 -- valid -- Tibetan Pit Viper
  Trimeresurus tokarensis Nagai, 1928 -- invalid
  Trimeresurus trigonocephalus (Latreille, 1801) -- valid -- Ceylon Pit Viper, Sri Lankan Green Pitviper
  Trimeresurus xiangchengensis Zhao, Jiang and Huang, 1979 -- invalid
  Tropidolaemus Wagler, 1830 -- valid
  Tropidolaemus huttoni (M. A. Smith, 1949) -- valid -- Hutton's Pitviper
  Tropidolaemus wagleri (F. Boie, 1827) -- valid -- Temple Pitviper, Wagler's Palm Viper, Wagler's Pit Viper
  Tropidophiidae Brongersma, 1951 -- valid -- Dwarf Boas
  Tropidophis Bibron in Ramon de la Sagra, 1840 -- valid -- Dwarf Boas
  Tropidophis battersbyi Laurent, 1949 -- valid -- Battersby's Dwarf Boa
  Tropidophis canus (Cope, 1868) -- valid -- Bahama-Wood Snake
  Tropidophis canus androsi Stull, 1928 -- invalid
  Tropidophis canus barbouri Bailey, 1937 -- invalid
  Tropidophis canus canus (Cope, 1868) -- invalid
  Tropidophis canus curtus (Garman, 1887) -- invalid
  Tropidophis caymanensis Battersby, 1938 -- valid -- Cayman Islands Dwarf Boa
  Tropidophis caymanensis caymanensis Battersby, 1938 -- invalid
  Tropidophis caymanensis parkeri Grant, 1940 -- invalid
  Tropidophis caymanensis schwartzi Thomas, 1963 -- invalid
  Tropidophis feicki Schwartz, 1957 -- valid -- Feick's Dwarf Boa
  Tropidophis fuscus Hedges and Garrido, 1992 -- valid -- Cuban Dusky Trope
  Tropidophis greenwayi Barbour and Shreve, 1936 -- valid -- Ambergris Cay Dwarf Boa, Caicos Trope
  Tropidophis greenwayi greenwayi Barbour and Shreve, 1936 -- valid -- Big Ambergris Dwarf Boa
  Tropidophis greenwayi lanthanus Schwartz, 1963 -- valid
  Tropidophis haetianus (Cope, 1879) -- valid -- Haitian Dwarf Boa, Hispaniolan Trope
  Tropidophis haetianus haetianus (Cope, 1879) -- valid
  Tropidophis haetianus hemerus Schwartz, 1975 -- valid -- Hispaniolan Trope
  Tropidophis haetianus jamaicensis Stull, 1928 -- invalid -- Jamaican Brown Trope
  Tropidophis haetianus stejnegeri Grant, 1940 -- invalid
  Tropidophis haetianus stullae Grant, 1940 -- invalid
  Tropidophis haetianus tiburonensis Schwartz, 1975 -- valid -- Haitian Dwarf Boa
  Tropidophis maculatus (Bibron in Ramon de la Sagra, 1840) -- valid -- Spotted Dwarf Boa, Spotted Red Trope
  Tropidophis melanurus (Schlegel, 1837) -- valid -- Dusky Dwarf Boa, Giant Trope, Wood Snake
  Tropidophis melanurus bucculentus (Cope, 1868) -- invalid
  Tropidophis melanurus dysodes Schwartz and Thomas, 1960 -- valid -- Wood Snake
  Tropidophis melanurus ericksoni Schwartz and Thomas, 1960 -- valid -- Wood Snake
  Tropidophis melanurus melanurus (Schlegel, 1837) -- valid
  Tropidophis nigriventris Bailey, 1937 -- valid -- Blackbelly Dwarf Boa, Dark-bellied Trope
  Tropidophis nigriventris hardyi Schwartz and Garrido, 1975 -- invalid
  Tropidophis nigriventris nigriventris Bailey, 1937 -- invalid
  Tropidophis pardalis (Gundlach, 1840) -- valid -- Leopard Dwarf Boa, Spotted Brown Trope
  Tropidophis paucisquamis (Müller in Schenkel, 1901) -- valid -- Brazilian Dwarf Boa
  Tropidophis pilsbryi Bailey, 1937 -- valid -- Oriente White-necked Trope, Pilsbry's Dwarf Boa
  Tropidophis pilsbryi galacelidus Schwartz and Garrido, 1975 -- invalid
  Tropidophis pilsbryi pilsbryi Bailey, 1937 -- invalid
  Tropidophis semicinctus (Gundlach and Peters, 1864) -- valid -- Banded Dwarf Boa, Yellow-banded Trope
  Tropidophis taczanowskyi (Steindachner, 1880) -- valid -- Taczanowsky's Dwarf Boa
  Tropidophis wrighti Stull, 1928 -- valid -- Gracile Banded Trope, Wright's Dwarf Boa
  Typhlina Wagler, 1830 -- invalid
  Typhlophis Fitzinger, 1843 -- valid
  Typhlophis squamosus (Schlegel, 1839) -- valid
  Typhlopidae Merrem, 1820 -- valid -- Blind Snakes, Blindsnakes, Typical Blind Snakes
  Typhlops Oppel, 1811 -- valid -- Blind Snakes, Blindsnakes
  Typhlops andamanensis Stoliczka, 1871 -- valid
  Typhlops angolensis (Bocage, 1866) -- valid
  Typhlops arenarius (Grandidier, 1872) -- valid
  Typhlops ater Schlegel, 1839 -- valid
  Typhlops beddomii Boulenger, 1890 -- valid
  Typhlops bibronii (Smith, 1846) -- valid
  Typhlops biminiensis Richmond, 1955 -- valid
  Typhlops biminiensis biminiensis Richmond, 1955 -- valid
  Typhlops biminiensis paradoxus Thomas, 1968 -- valid
  Typhlops bipartitus Sauvage, 1879 -- valid
  Typhlops bisubocularis Boettger, 1893 -- valid
  Typhlops bothriorhynchus Günther, 1864 -- valid
  Typhlops boulengeri Bocage, 1893 -- valid
  Typhlops brongersmianus Vanzolini, 1976 -- valid
  Typhlops canlaonensis Taylor, 1917 -- valid
  Typhlops capitulatus Richmond, 1964 -- valid
  Typhlops cariei Hoffstetter, 1946 -- valid
  Typhlops castanotus Wynn and Leviton, 1993 -- valid
  Typhlops catapontus Thomas, 1966 -- valid
  Typhlops caymanensis Sackett, 1940 -- valid
  Typhlops ceylonicus Smith, 1943 -- valid
  Typhlops coecatus Jan, 1863 -- valid
  Typhlops collaris Wynn and Leviton, 1993 -- valid
  Typhlops comorensis Boulenger, 1889 -- valid
  Typhlops congestus (Duméril and Bibron, 1844) -- valid
  Typhlops conradi Peters, 1874 -- valid
  Typhlops costaricensis Jiménez and Savage, 1963 -- valid
  Typhlops cuneirostris Peters, 1879 -- valid
  Typhlops decorosus Buchholz and Peters, 1875 -- valid
  Typhlops decorsei Mocquard, 1901 -- valid
  Typhlops depressiceps Sternfeld, 1913 -- valid
  Typhlops diardii Schlegel, 1839 -- valid
  Typhlops domergnei Roux-Estève, 1980 -- valid
  Typhlops dominicanus Stejneger, 1904 -- valid
  Typhlops dominicanus dominicanus Stejneger, 1904 -- valid
  Typhlops dominicanus guadeloupensis Richmond, 1966 -- valid
  Typhlops elegans Peters, 1868 -- valid
  Typhlops epactius Thomas, 1968 -- valid
  Typhlops exiguus Jan, 1864 -- valid
  Typhlops floweri Boulenger, 1899 -- valid
  Typhlops fornasinii Bianconi, 1847 -- valid
  Typhlops fredparkeri Wallach, 1996 -- valid
  Typhlops giadinhensis Bourret, 1937 -- valid
  Typhlops gierrai Mocquard, 1897 -- valid
  Typhlops gonavensis Richmond, 1964 -- valid
  Typhlops granti Ruthven and Gaige, 1935 -- valid -- Grant's Blind Snake, Grant's Blindsnake
  Typhlops grivensis Hoffstetter, 1946 -- valid
  Typhlops hectus Thomas, 1974 -- valid
  Typhlops hedraeus Savage, 1950 -- valid
  Typhlops hypogius Savage, 1950 -- valid
  Typhlops hypomethes Hedges and Thomas, 1991 -- valid -- Coastal Blindsnake
  Typhlops hypsobothrius Werner, 1917 -- valid
  Typhlops inornatus Boulenger, 1888 -- valid
  Typhlops jamaicensis (Shaw, 1802) -- valid
  Typhlops jerdoni Boulenger, 1890 -- valid
  Typhlops khoratensis Taylor, 1962 -- valid
  Typhlops klemmeri Taylor, 1962 -- valid
  Typhlops koekkoeki Brongersma, 1934 -- valid
  Typhlops koshunensis Oshima, 1916 -- valid
  Typhlops kraalii Doria, 1874 -- valid
  Typhlops lankaensis Taylor, 1947 -- valid
  Typhlops lehneri Roux, 1926 -- valid
  Typhlops leucomelas Boulenger, 1890 -- valid
  Typhlops leucostictus Boulenger, 1898 -- valid
  Typhlops lineolatus Jan, 1863 -- valid
  Typhlops loveridgei Constable, 1949 -- valid
  Typhlops lumbricalis (Linnaeus, 1758) -- valid
  Typhlops luzonensis Taylor, 1919 -- valid
  Typhlops madagascariensis Boettger, 1877 -- valid
  Typhlops malcolmi Taylor, 1947 -- valid
  Typhlops manilae Taylor, 1919 -- valid
  Typhlops manni Loveridge, 1941 -- valid
  Typhlops marxi Wallach, 1993 -- valid
  Typhlops mcdowelli Wallach, 1996 -- valid
  Typhlops microstomus Cope, 1866 -- valid -- Serpiente-ciega yucateca
  Typhlops minuisquamus Dixon and Hendricks, 1979 -- valid
  Typhlops mirus Jan, 1860 -- valid
  Typhlops monastus Thomas, 1966 -- valid
  Typhlops monastus geotomus Thomas, 1966 -- valid
  Typhlops monastus monastus Thomas, 1966 -- valid
  Typhlops monensis Schmidt, 1926 -- valid -- Mona Blind Snake, Mona Blindsnake
  Typhlops mucronatus Boettger, 1880 -- valid
  Typhlops oatesii Boulenger, 1890 -- valid
  Typhlops obtusus Peters, 1865 -- valid
  Typhlops ocularis Parker, 1927 -- valid
  Typhlops oligolepis Wall, 1909 -- valid
  Typhlops pammeces Günther, 1864 -- valid
  Typhlops paucisquamus Dixon and Hendricks, 1979 -- valid
  Typhlops platycephalus Duméril and Bibron, 1844 -- valid -- Flat-headed Blindsnake
  Typhlops platyrhynchus Sternfeld, 1910 -- valid
  Typhlops porrectus Stoliczka, 1871 -- valid
  Typhlops punctatus (Leach, 1819) -- valid
  Typhlops punctatus liberiensis (Hallowell, 1848) -- valid
  Typhlops punctatus punctatus (Leach, 1819) -- valid
  Typhlops pusillus Barbour, 1914 -- valid
  Typhlops reticulatus (Linnaeus, 1758) -- valid
  Typhlops reuteri Boettger, 1881 -- valid
  Typhlops richardii Duméril and Bibron, 1844 -- valid -- Richard's Blind Snake, Richard's Blindsnake
  Typhlops rondoensis Loveridge, 1942 -- valid
  Typhlops rostellatus Stejneger, 1904 -- valid -- Puerto Rican Wetland Blind Snake, Puerto Rican Wetland Blindsnake
  Typhlops ruber Boettger, 1897 -- valid
  Typhlops ruficaudus (Gray, 1845) -- valid
  Typhlops schmidti Laurent, 1956 -- valid
  Typhlops schmidti schmidti Laurent, 1956 -- valid
  Typhlops schmidti wilsoni Laurent, 1968 -- valid
  Typhlops schmutzi Auffenberg, 1980 -- valid
  Typhlops schwartzi Thomas, 1989 -- valid
  Typhlops siamensis Günther, 1864 -- valid
  Typhlops socotranus Boulenger, 1889 -- valid
  Typhlops steinhausi Werner, 1909 -- valid
  Typhlops sulcatus Cope, 1868 -- valid -- Sulcate Blind Snake, Sulcate Blindsnake
  Typhlops syntherus Thomas, 1965 -- valid
  Typhlops tasymicris Thomas, 1974 -- valid
  Typhlops tenebrarum Taylor, 1947 -- valid
  Typhlops tenuicollis (Peters, 1864) -- valid
  Typhlops tenuis Salvin, 1860 -- valid
  Typhlops tetrathyreus Thomas, 1989 -- valid
  Typhlops thurstoni Boettger, 1890 -- valid
  Typhlops tindalli Smith, 1943 -- valid
  Typhlops titanops Thomas, 1989 -- valid
  Typhlops trangensis Taylor, 1962 -- valid
  Typhlops trinitatus Richmond, 1965 -- valid -- Trinidad Worm Snake
  Typhlops uluguruensis Barbour and Loveridge, 1928 -- valid
  Typhlops unilineatus (Duméril and Bibron, 1844) -- valid
  Typhlops veddae Taylor, 1947 -- valid
  Typhlops vermicularis Merrem, 1820 -- valid
  Typhlops violaceus Taylor, 1947 -- valid
  Typhlops wilsoni Wall, 1908 -- valid
  Typhlops yonenagae Rodriques, 1991 -- valid
  Typhlops zenkeri Sternfeld, 1908 -- valid
  Ungaliophis Müller, 1880 -- valid
  Ungaliophis continentalis Müller, 1880 -- valid -- Boa-enana del Istmo
  Ungaliophis panamensis K. P. Schmidt, 1933 -- valid
  Uropeltidae Müller, 1832 -- valid -- Pipe Snakes, Shield-tailed Snakes
  Uropeltis Cuvier, 1829 -- valid
  Uropeltis arcticeps (Günther, 1875) -- valid
  Uropeltis beddomii (Günther, 1862) -- valid
  Uropeltis broughami (Beddome, 1878) -- valid
  Uropeltis ceylanica Cuvier, 1829 -- valid
  Uropeltis dindigalensis (Beddome, 1877) -- valid
  Uropeltis ellioti (Gray, 1858) -- valid
  Uropeltis liura (Günther, 1875) -- valid
  Uropeltis macrolepis (Peters, 1862) -- valid
  Uropeltis macrorhyncha (Beddome, 1877) -- valid
  Uropeltis maculata (Beddome, 1878) -- valid
  Uropeltis melanogaster (Gray, 1858) -- valid
  Uropeltis myhendrae (Beddome, 1886) -- valid
  Uropeltis nitida (Beddome, 1878) -- valid
  Uropeltis ocellata (Beddome, 1863) -- valid
  Uropeltis petersi (Beddome, 1878) -- valid
  Uropeltis phillipsi (Nicholls, 1929) -- valid
  Uropeltis phipsonii (Mason, 1888) -- valid
  Uropeltis pulneyensis (Beddome, 1863) -- valid
  Uropeltis rubrolineata (Günther, 1875) -- valid
  Uropeltis rubromaculata (Beddome, 1867) -- valid
  Uropeltis ruhunae Deraniyagala, 1954 -- valid
  Uropeltis smithi Gans, 1966 -- valid
  Uropeltis woodmasoni (Theobald, 1876) -- valid
  Vipera Laurenti, 1768 -- valid
  Vipera albicornuta Nilson and Andrén, 1985 -- invalid
  Vipera albizona Nilson, Andrén and Flärdh, 1990 -- invalid
  Vipera ammodytes (Linnaeus, 1758) -- valid -- Nose-horned Viper
  Vipera ammodytes ammodytes (Linnaeus, 1758) -- valid
  Vipera ammodytes gregorwallneri Sochurek, 1974 -- invalid
  Vipera ammodytes meridionalis Boulenger, 1903 -- valid
  Vipera ammodytes montandoni Boulenger, 1904 -- valid
  Vipera ammodytes transcaucasiana Boulenger, 1913 -- invalid
  Vipera aspis (Linnaeus, 1758) -- valid -- Asp Viper
  Vipera aspis aspis (Linnaeus, 1758) -- valid
  Vipera aspis atra Meisner, 1820 -- valid
  Vipera aspis balcanica Buresch and Zonkov, 1934 -- invalid
  Vipera aspis francisciredi Laurenti, 1768 -- valid
  Vipera aspis hugyi Schinz, 1833 -- valid
  Vipera aspis zinnikeri Kramer, 1958 -- valid
  Vipera barani Böhme and Joger, 1983 -- valid -- Turkish Viper
  Vipera berus (Linnaeus, 1758) -- valid
  Vipera berus berus (Linnaeus, 1758) -- valid
  Vipera berus bosniensis Boettger, 1889 -- valid
  Vipera berus sachalinensis Zarevsky, 1917 -- valid
  Vipera bornmuelleri Werner, 1898 -- invalid
  Vipera bulgardaghica Nilson and Andrén, 1985 -- invalid
  Vipera darevskii Vedmederya, Orlov and Tuniyev, 1986 -- valid -- Darevsky's Viper
  Vipera dinniki Nikolsky, 1913 -- valid -- Dinnik's Viper
  Vipera kaznakovi Nikolsky, 1909 -- valid -- Caucasus Viper
  Vipera latastei Bosca, 1878 -- valid -- Lataste's Viper
  Vipera latastei gaditana Saint Girons, 1977 -- valid
  Vipera latastei latastei Bosca, 1878 -- valid
  Vipera latifii Mertens, Darewsky and Klemmer, 1967 -- invalid -- Lar Valley Viper
  Vipera lotievi Nilson, Tuniyev, Orlov, Hoggren and Andrén, 1995 -- valid -- Lotiev's Viper
  Vipera monticola Saint Girons, 1953 -- valid -- Mountain Viper
  Vipera nikolskii Vedmederya, Grubant and Rudayewa, 1986 -- invalid
  Vipera palaestinae Werner, 1938 -- invalid
  Vipera pontica Billing, Nilson and Sattler, 1990 -- valid -- Black Sea Viper
  Vipera raddei Boettger, 1890 -- invalid
  Vipera russellii (Shaw and Nodder, 1797) -- invalid
  Vipera seoanei Lataste, 1879 -- valid -- Portugese Viper
  Vipera seoanei cantabrica Braña and Bas, 1983 -- valid
  Vipera seoanei seoanei Lataste, 1879 -- valid
  Vipera ursinii (Bonaparte, 1835) -- valid -- Meadow Viper, Orsinis Viper
  Vipera wagneri Nilson and Andrén, 1984 -- invalid
  Vipera xanthina (Gray, 1849) -- invalid
  Vipera xanthina bornmuelleri Werner, 1898 -- invalid
  Vipera xanthina xanthina (Gray, 1849) -- invalid
  Viperidae Oppel, 1811 -- valid -- Pit Vipers, Vipers
  Viperinae Oppel, 1811 -- valid
  Xenoboa Hoge, 1953 -- invalid
  Xenoboa cropanii Hoge, 1953 -- invalid
  Xenopeltidae Bonaparte, 1845 -- valid -- Sunbeam Snakes
  Xenopeltis Reinwardt, 1827 -- valid
  Xenopeltis hainanensis Hu and Zhao, 1972 -- valid
  Xenopeltis unicolor Reinwardt, 1827 -- valid
  Xenotyphlops Wallach and Ineich, 1996 -- valid
  Xenotyphlops grandidieri (Mocquard, 1905) -- valid
   

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