Integrated Taxonomic Information System - Taxon Author Search Results

Source: Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, database (version undefined)

ITIS records citing this source
 
 Kingdom Animalia
  Abronia Gray, 1838 -- valid
  Abronia bogerti Tihen, 1954 -- valid -- Lagarto alicante de Bogert, Bogert's Arboreal Alligator Lizard
  Abronia chiszari Smith and Smith, 1981 -- valid -- Chiszar's Arboreal Alligator Lizard, Lagarto alicante de Chiszar
  Abronia deppii (Wiegmann, 1828) -- valid -- Deppe's Arboreal Alligator Lizard
  Abronia fuscolabialis (Tihen, 1944) -- valid -- Escorpión Arboricola del Zempoaltepec, Mount Zempoaltepec Arboreal Alligator Lizard, Lagarto alicante de Zempoaltepec
  Abronia graminea (Cope, 1864) -- valid -- Lagarto alicante terrestre, Sierra de Tehuacan Arboreal Alligator Lizard, Terrestrial Arboreal Alligator Lizard
  Abronia kalaina Good and Schwenk, 1985 -- invalid -- Lagarto alicante de Sierra de Juárez
  Abronia lythrochila Smith and Alvarez del Toro, 1963 -- valid -- Lagarto alicante labios rojos, Red-lipped Arboreal Alligator Lizard
  Abronia matudai (Hartweg and Tihen, 1946) -- valid -- Lagarto alicante rayado, Matuda's Arboreal Alligator Lizard
  Abronia mitchelli Campbell, 1982 -- valid -- Lagarto alicante de Mitchell, Mitchell's Arboreal Alligator Lizard
  Abronia mixteca Bogert and Porter, 1967 -- valid -- Lagarto alicante mixteco, Mixtecan Arboreal Alligator Lizard
  Abronia oaxacae (Günther, 1885) -- valid -- Lagarto alicante oaxaqueño, Oaxacan Arboreal Alligator Lizard
  Abronia ochoterenai (Martín del Campo, 1939) -- valid -- Lagarto alicante verde, Ochoterena's Arboreal Alligator Lizard, Northern Chiapas Arboreal Alligator Lizard
  Abronia ornelasi Campbell, 1984 -- valid -- Lagarto alicante de Cerro Baúl, Ornelas's Arboreal Alligator Lizard, Cerro Baul Alligator Lizard
  Abronia reidi Werler and Shannon, 1961 -- valid -- Lagarto alicante de Reid, Reid's Arboreal Alligator Lizard
  Abronia taeniata (Wiegmann, 1828) -- valid -- Lagarto alicante de bromelia, Banded Arboreal Alligator Lizard, Bromeliad Arboreal Alligator Lizard
  Acris Duméril and Bibron, 1841 -- valid -- Cricket Frogs
  Acris crepitans Baird, 1854 -- valid -- Northern Cricket Frog, Rana-grillo norteño, Eastern Cricket Frog
  Adelophis Dugès, 1879 -- valid
  Adelophis copei Dugès, 1879 -- valid -- Culebra-de vega de Cope, Cope's Mountain Meadow Snake
  Adelophis foxi Rossman and Blaney, 1968 -- valid -- Culebra-de vega de Fox, Fox's Mountain Meadow Snake
  Adelphicos Jan, 1862 -- valid
  Adelphicos latifasciatus Lynch and H. M. Smith, 1966 -- invalid -- Culebra-cavadora oaxaqueña
  Adelphicos nigrilatus H. M. Smith, 1942 -- invalid -- Culebra-cavadora ocotera
  Adelphicos quadrivirgatus Jan, 1862 -- invalid -- Culebra-cavadora centroamericana
  Agalychnis Cope, 1864 -- valid
  Agalychnis callidryas (Cope, 1862) -- valid -- Rana-de árbol ojos rojos, Red-eyed Treefrog
  Agalychnis moreletii (Duméril, 1853) -- valid
  Agkistrodon Palisot de Beauvois, 1799 -- valid -- Copperheads, Cottonmouths, American Moccasins
  Agkistrodon bilineatus Günther, 1863 -- valid -- Cantil enjaquimado, Mexican Moccasin
  Agkistrodon contortrix (Linnaeus, 1766) -- valid -- Copperhead, Cantil cobrizo, Eastern Copperhead
  Alligatoridae -- valid -- Caimans, Alligators
  Amastridium Cope, 1861 -- valid
  Amastridium veliferum Cope, 1861 -- valid -- Culebra cabeza cobriza, Rustyhead Snake
  Ambystoma Tschudi, 1838 -- valid -- Mole Salamanders
  Ambystoma amblycephalum Taylor, 1940 -- valid -- Salamandra cabeza chata
  Ambystoma andersoni Krebs and Brandon, 1984 -- valid -- Salamandra de Anderson
  Ambystoma bombypellum Taylor, 1940 -- valid -- Salamandra piel fina
  Ambystoma dumerilii (Dugès, 1870) -- valid
  Ambystoma flavipiperatum Dixon, 1963 -- valid -- Salamandra de Chapala
  Ambystoma granulosum Taylor, 1944 -- valid -- Salamandra granulada
  Ambystoma lermaense (Taylor, 1940) -- valid -- Lake Lerma Salamander
  Ambystoma mexicanum (Shaw and Nodder, 1798) -- valid -- Axolotl, Salamandra ajolote
  Ambystoma ordinarium Taylor, 1940 -- valid -- Salamandra michoacana
  Ambystoma rosaceum Taylor, 1941 -- valid -- Salamandra tarahumara
  Ambystoma taylori Brandon, Maruska and Rumph, 1982 -- valid -- Salamandra de Taylor
  Ambystoma tigrinum (Green, 1825) -- valid -- Tiger Salamander, Salamandra tigre, Eastern Tiger Salamander
  Ambystoma velasci Dugès, 1888 -- valid -- Salamandra tigre de meseta
  Ambystomatidae Gray, 1850 -- valid -- Mole Salamanders
  Ameiva Meyer, 1795 -- valid -- Ground Lizards, Ameivas
  Ameiva chaitzami Stuart, 1942 -- invalid -- Ameiva de Chaitzam
  Ameiva festiva (Lichtenstein and Martens in Lichtenstein, 1856) -- invalid -- Ameiva centroamericana
  Ameiva undulata (Wiegmann, 1834) -- invalid -- Ameiva metálica o arcoiris
  Amphibia -- valid -- amphibiens, anfíbio, Amphibians
  Amphisbaenia -- valid -- Worm Lizards, Amphisbaenians
  Anapsida -- invalid
  Aneides Baird, 1851 -- valid -- Climbing Salamanders
  Aneides lugubris (Hallowell, 1849) -- valid -- Salamandra arbórea, Arboreal Salamander
  Anelytropsis Cope, 1885 -- valid -- Mexican Blind Lizard
  Anelytropsis papillosus Cope, 1885 -- valid -- Lagartija Ciega Mexicana, Mexican Blind Lizard, Lagartija-ciega mexicana
  Anguidae -- valid -- Alligator Lizards, Anguid Lizards, Anguids, Galliwasps, Glass Lizards
  Anniella Gray, 1852 -- valid -- Legless Lizards, North American Legless Lizards, American legless lizards, California legless lizards
  Anniella geronimensis Shaw, 1940 -- valid -- Lagartija sin patas de Isla Jerónimo, Baja California Legless Lizard
  Anniella pulchra Gray, 1852 -- valid -- Lagartija sin patas californiana, California Legless Lizard, Silvery Legless Lizard, Northern Legless Lizard
  Anniellidae -- invalid -- North American Legless Lizards, Legless Lizards
  Anolis Daudin, 1802 -- valid -- Anoles, Western Antillean Anoles
  Anolis adleri H. M. Smith, 1972 -- invalid -- Anolis de Adler
  Anolis anisolepis H. M. Smith, Burley and Fritts, 1968 -- valid -- Anolis adornado, Chiapas Ornate Anole
  Anolis baccatus Bocourt, 1873 -- invalid -- Anolis de Bocourt
  Anolis barkeri K. P. Schmidt, 1939 -- valid -- Anolis de Barker, Barker's Anole
  Anolis biporcatus (Wiegmann, 1834) -- valid -- Anolis verde neotropical, Giant Green Anole, Neotropical Green Anole
  Anolis breedlovei H. M. Smith and Paulson, 1968 -- invalid -- Anolis de Breedlove
  Anolis capito W. C. H. Peters, 1863 -- valid -- Anolis jaspeado, Bighead Anole
  Anolis carolinensis Voigt in Cuvier and Voigt, 1832 -- valid -- Green Anole, Anolis verde, anole vert
  Anolis compressicaudus H. M. Smith and Kerster, 1955 -- valid -- Anolis de Malpaso, Malposo Scaly Anole
  Anolis crassulus Cope, 1864 -- valid -- Anolis adornado, Ornate Anole
  Anolis cumingii W. C. H. Peters, 1863 -- invalid
  Anolis cuprinus H. M. Smith, 1964 -- valid -- Anolis chiapaneco, Copper Anole
  Anolis cymbops Cope, 1864 -- valid -- Anolis veracruzano, Cope's Veracruz Anole
  Anolis dollfusianus Bocourt, 1873 -- valid -- Anolis cafetalero, Coffee Anole
  Anolis duellmani Fitch and Henderson, 1973 -- valid -- Anolis de Duellman, Duellman's Pigmy Anole
  Anolis dunni H. M. Smith, 1936 -- valid -- Anolis de Dunn, Dunn's Anole
  Anolis forbesi H. M. Smith and Van Gelder, 1955 -- invalid -- Anolis de Forbes
  Anolis gadovii Boulenger, 1905 -- valid -- Gadow's Anole
  Anolis isthmicus Fitch, 1978 -- invalid -- Anolis tehuano
  Anolis laeviventris (Wiegmann, 1834) -- valid -- Anolis blanco, White Anole
  Anolis lemurinus Cope, 1861 -- valid -- Anolis fantasma, Ghost Anole
  Anolis liogaster Boulenger, 1905 -- valid -- Anolis rojo, Guerreran Anole
  Anolis macrinii H. M. Smith, 1968 -- valid -- Anolis de Macrinus, Macrinius' Anole
  Anolis matudai H. M. Smith, 1956 -- valid -- Anolis de Matuda, Matuda's Anole
  Anolis megapholidotus H. M. Smith, 1933 -- valid -- Anolis de escamas grandes, Large-scaled Anole
  Anolis microlepidotus Davis, 1954 -- valid -- Anolis guerrerense, Guerreran Oak Anole
  Anolis milleri H. M. Smith in H. M. Smith and Taylor, 1950 -- valid -- Anolis de Miller, Miller's Anole
  Anolis naufragus (Campbell, Hillis and Lamar, 1989) -- valid -- Anolis de Hidalgo, Hidalgo Anole
  Anolis nebuloides Bocourt, 1873 -- valid -- Anolis falso-pañuelo, False Clouded Anole
  Anolis nebulosus (Wiegmann, 1834) -- valid -- Anolis pañuelo, Clouded Anole
  Anolis omiltemanus Davis, 1954 -- valid -- Anolis de Omilteme, Omilteme Anole
  Anolis parvicirculatus Álvarez del Toro and H. M. Smith, 1956 -- valid -- Anolis de Barriozabal, Berriozabal Anole
  Anolis pentaprion Cope, 1863 -- valid -- Anolis liquen, Lichen Anole
  Anolis petersii Bocourt, 1873 -- valid -- Peters' Anole
  Anolis polyrhachis H. M. Smith, 1968 -- invalid -- Anolis de Sierra de Juárez
  Anolis pygmaeus Álvarez del Toro and H. M. Smith, 1956 -- valid -- Anolis pigmeo-de Chiapas, Chiapas Pigmy Anole
  Anolis quercorum Fitch, 1978 -- valid -- Anolis encinero, Oaxacan Oak Anole, Gray Anole
  Anolis rodriguezi Bocourt, 1873 -- invalid -- Anolis liso
  Anolis sagrei Cocteau in A. M. C. Duméril and Bibron, 1837 -- valid -- Brown Anole, Anolis café, Cuban Brown Anole
  Anolis schiedii (Wiegmann, 1834) -- valid -- Schiede's Anole
  Anolis schmidti H. M. Smith, 1939 -- invalid -- Anolis de Schmidt
  Anolis sericeus Hallowell, 1856 -- valid -- Anolis sedoso, Silky Anole
  Anolis simmonsi Holman, 1964 -- invalid -- Anolis de Simmons
  Anolis subocularis Davis, 1954 -- valid -- Anolis del Pacífico, Pacific Anole
  Anolis taylori H. M. Smith and Spieler, 1945 -- valid -- Anolis de Taylor, Taylor's Anole
  Anolis tropidonotus W. C. H. Peters, 1863 -- valid -- Anolis escamoso-mayor, Greater Scaly Anole
  Anolis uniformis Cope, 1885 -- valid -- Anolis escamoso-menor, Lesser Scaly Anole
  Anolis utowanae Barbour, 1932 -- invalid -- Anolis de Utowana
  Anotheca Smith, 1939 -- invalid
  Anotheca spinosa (Steindachner, 1864) -- invalid -- Rana-de árbol coronada
  Anura -- valid -- Frogs, perereca, rã, sapo, crapauds, grenouilles, Toads
  Apalone Rafinesque, 1832 -- valid -- North American Softshell Turtles, North American Softshells
  Apalone ater (Webb and Legler, 1960) -- invalid -- Cuatro Cienegas softshell turtle, Tortuga-casco suave de Cuatro Ciénegas
  Apalone spinifera (LeSueur, 1827) -- valid -- Spiny Softshell, tortue-molle à épines, Tortuga-casco suave espinosa, Spiny Softshell Turtle
  Aristelliger Cope, 1862 -- valid -- Croaking Geckos
  Aristelliger georgeensis (Bocourt, 1873) -- valid -- Geco pestañudo
  Arizona Kennicott in Baird, 1859 -- valid -- Glossy Snakes
  Arizona elegans Kennicott in Baird, 1859 -- valid -- Glossy Snake, Culebra brillante
  Atropoides Werman, 1992 -- valid
  Atropoides nummifer (Rüppell, 1845) -- valid -- Nauyaca o nayaraca saltadora, Jumping Pit Viper
  Atropoides olmec (Perez-Higareda, H. M. Smith and Julia-Zertuche, 1985) -- valid -- Nauyaca de Los Tuxtlas, Olmecan Pit Viper
  Barisia Gray, 1838 -- valid
  Barisia imbricata (Wiegmann, 1828) -- valid -- Lagarto alicante del Popocatépetl, Imbricate Alligator Lizard, Transvolcanic Alligator Lizard
  Barisia levicollis Stejneger, 1890 -- valid -- Lagarto alicante de Chihuahua, Chihuahuan Alligator Lizard
  Barisia rudicollis (Wiegmann, 1828) -- valid -- Lagarto alicante cuello rugoso, Rough-necked Alligator Lizard
  Basiliscus Laurenti, 1768 -- valid -- Basilisks
  Basiliscus vittatus Wiegmann, 1828 -- valid -- Brown Basilisk, Basilisco rayado
  Bataguridae Gray, 1869 -- invalid -- Batagurine Turtles
  Batrachoseps Bonaparte, 1839 -- valid -- Slender Salamanders
  Batrachoseps pacificus (Cope, 1865) -- valid -- Salamandra-delgada del Pacífico, Pacific Slender Salamander, Channel Islands Slender Salamander
  Bipedidae Taylor, 1951 -- valid -- Two-legged Worm Lizards
  Bipes Latreille in Sonnini and Latreille, 1801 -- valid
  Bipes biporus (Cope, 1894) -- valid -- Lagartija-topo cinco dedos, Five-toed Worm Lizard
  Bipes canaliculatus Latreille in Sonnini and Latreille, 1801 -- valid -- Lagartija-topo cuatro dedos, Four-toed Worm Lizard
  Bipes tridactylus (Dugès, 1894) -- valid -- Lagartija-topo tres dedos, Three-toed Worm Lizard
  Boa Linnaeus, 1758 -- valid -- Boas
  Boa constrictor Linnaeus, 1758 -- valid -- Boa Constrictor, Boa constrictor
  Bogertophis Dowling and Price, 1988 -- valid -- Desert Rat Snakes, Desert Ratsnakes
  Bogertophis rosaliae (Mocquard, 1899) -- valid -- Baja California Rat Snake, Baja California Ratsnake, Culebra-ratonera de Baja California
  Bogertophis subocularis (Brown, 1901) -- valid -- Trans-Pecos Rat Snake, Culebra-ratonera de Transpecos, Trans-Pecos Ratsnake
  Boidae Gray, 1825 -- valid -- Boas, Boids
  Bolitoglossa Duméril, Bibron and Duméril, 1854 -- valid -- tropical lungless salamanders
  Bolitoglossa engelhardti (Schmidt, 1936) -- valid -- Salamandra-lengua hongueada de Engelhardt
  Bolitoglossa flavimembris (Schmidt, 1936) -- valid -- Salamandra-lengua hongueada patas amarillas
  Bolitoglossa flaviventris (Schmidt, 1936) -- valid -- Salamandra-lengua hongueada vientre amarillo
  Bolitoglossa franklini (Schmidt, 1936) -- valid
  Bolitoglossa hartwegi Wake and Brame, 1969 -- valid
  Bolitoglossa hermosa Papenfuss, Wake and Adler, 1984 -- valid -- Salamandra-lengua hongueada guerrerense
  Bolitoglossa lincolni (Stuart, 1943) -- valid -- Salamandra-lengua hongueada de Lincon
  Bolitoglossa macrinii (Lafrentz, 1930) -- valid -- Salamandra-lengua hongueada oaxaqueña
  Bolitoglossa mexicana Duméril, Bibron and Duméril, 1854 -- valid -- Salamandra-lengua hongueada mexicana
  Bolitoglossa mulleri (Brocchi, 1883) -- valid -- Salamandra-lengua hongueada de Muller
  Bolitoglossa occidentalis Taylor, 1941 -- valid -- Salamandra-lengua hongueada occidental
  Bolitoglossa platydactyla (Gray, 1831) -- valid -- Salamandra-lengua hongueada pies anchos
  Bolitoglossa riletti Holman, 1964 -- valid -- Salamandra-lengua hongueada de Rilett
  Bolitoglossa rostrata (Brocchi, 1883) -- valid -- Salamandra-lengua hongueada narigona
  Bolitoglossa rufescens (Cope, 1869) -- valid -- Salamandra-lengua hongueada rojiza
  Bolitoglossa stuarti Wake and Brame, 1969 -- valid -- Salamandra-lengua hongueada de Stuart
  Bolitoglossa veracrucis Taylor, 1951 -- valid -- Salamandra-lengua hongueada veracruzana
  Bolitoglossa yucatana (Peters, 1882) -- valid -- Salamandra-lengua hongueada
  Bothriechis Peters, 1859 -- valid
  Bothriechis aurifer (Salvin, 1860) -- valid -- Nauyaca-de árbol manchas amarillas, Yellow-blotched Palm Pit Viper
  Bothriechis bicolor (Bocourt, 1868) -- valid -- Nauyaca-de árbol bicolor, Guatemala 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
  Bothrops Wagler, 1824 -- valid
  Bothrops asper (Garman, 1883) -- valid -- Nauyaca-terciopelo real, Terciopelo, Terciopelo
  Bufo Laurenti, 1768 -- invalid -- Toads
  Bufo alvarius Girard in Baird, 1859 -- invalid -- Sonoran Desert Toad, Colorado River Toad, Sapo del desierto-sonorense
  Bufo bocourti Brocchi, 1877 -- invalid -- Sapo de Bocourt
  Bufo boreas Baird and Girard, 1852 -- invalid -- Western Toad, Sapo del Oeste
  Bufo canaliferus Cope, 1877 -- invalid -- Sapo serrano
  Bufo cavifrons Firschein, 1950 -- invalid -- Sapo de montaña
  Bufo coccifer Cope, 1866 -- invalid -- Sapo chichito
  Bufo cognatus Say in James, 1822 -- invalid -- Great Plains Toad, Sapo de la gran planicie
  Bufo compactilis Wiegmann, 1833 -- invalid -- Sapo de meseta
  Bufo cristatus Wiegmann, 1833 -- invalid -- Sapo cresta grande
  Bufo debilis Girard, 1854 -- invalid -- Green Toad, Sapo verde
  Bufo gemmifer Taylor, 1940 -- invalid -- Sapo joya
  Bufo kelloggi Taylor, 1938 -- invalid -- Sapo mexicano-menor
  Bufo luetkenii Boulenger, 1891 -- invalid
  Bufo marinus (Linnaeus, 1758) -- invalid -- Giant Toad, Sapo gigante, Marine Toad, Cane Toad
  Bufo marmoreus Wiegmann, 1833 -- invalid -- Sapo marmoleado
  Bufo mazatlanensis Taylor, 1940 -- invalid -- Sapo sinaloense
  Bufo microscaphus Cope, 1867 -- invalid -- Sapo del suroeste, Arizona Toad, Southwestern Toad
  Bufo occidentalis Camerano, 1879 -- invalid -- Sapo pinero
  Bufo perplexus Taylor, 1943 -- invalid -- Sapo perplejo
  Bufo punctatus Baird and Girard, 1852 -- invalid -- Red-spotted Toad, Sapo manchas rojas
  Bufo retiformis Sanders and Smith, 1951 -- invalid -- Sonoran Green Toad, Sapo verde-sonorense
  Bufo speciosus Girard, 1854 -- invalid -- Texas Toad, Sapo texano
  Bufo tacanensis Smith, 1952 -- invalid -- Sapo del Tacaná
  Bufo valliceps Wiegmann, 1833 -- invalid -- Sapo del golfo, Gulf Coast Toad
  Bufo woodhousii Girard, 1854 -- invalid -- Woodhouse's Toad
  Bufonidae Gray, 1825 -- valid -- Bufonids, bufonidés, crapauds, Toads
  Caeciliaidae Anonymous, 1987 -- invalid
  Caiman Spix, 1825 -- valid -- Caimans
  Caiman crocodilus (Linnaeus, 1758) -- valid -- Common Caiman, Spectacled Caiman
  Callisaurus Blainville, 1835 -- valid -- Zebra-tailed Lizards
  Callisaurus draconoides Blainville, 1835 -- valid -- Zebra-tailed Lizard, Lagartija cachora
  Caretta Rafinesque, 1814 -- valid -- Loggerhead Sea Turtles
  Caretta caretta (Linnaeus, 1758) -- valid -- Loggerhead, Tortuga-marina caguama, Loggerhead Sea Turtle
  Caudata -- valid -- salamandres, salamandra, Salamanders
  Celestus Gray, 1839 -- valid -- Galliwasps
  Celestus enneagrammus (Cope, 1861) -- valid -- Celesto huasteco, Huaxteca Lesser Galliwasp
  Celestus rozellae Smith, 1942 -- valid -- Celesto vientre verde, Rozella's Lesser Galliwasp
  Centrolenella Noble, 1920 -- invalid
  Centrolenella fleischmanni (Boettger, 1893) -- invalid -- Rana vientre traslúcido
  Centrolenidae Taylor, 1951 -- valid -- Glass Frogs, Leaf Frogs
  Cerrophidion Campbell and Lamar, 1992 -- valid
  Cerrophidion barbouri (Dunn, 1919) -- invalid -- Nauyaca-de montaña guerrerense
  Cerrophidion godmani (Günther, 1863) -- valid -- Nauyaca-de montaña de Godman, Godman's Montane Pit Viper
  Cerrophidion tzotzilorum (Campbell, 1985) -- valid -- Nauyaca-de montaña tzotzil, Tzotzil Montane Pit Viper
  Chelonia Brongniart, 1800 -- valid -- Green Sea Turtles
  Chelonia agassizii Bocourt, 1868 -- invalid -- Pacific green turtle
  Chelonia mydas (Linnaeus, 1758) -- valid -- Green Sea Turtle, Tortuga-marina verde-del Atlántico, Common Green Sea Turtle, Green Turtle
  Cheloniidae Oppel, 1811 -- valid -- marine turtles, modern sea turtles, Sea Turtles
  Chelydra Schweigger, 1812 -- valid -- Snapping Turtles, common snapping turtles
  Chelydra serpentina (Linnaeus, 1758) -- valid -- Snapping Turtle, chélydre serpentine, Tortuga-lagarto común, Common Snapping Turtle, North American Snapping Turtle
  Chelydridae Gray, 1831 -- valid -- Snapping Turtles
  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
  Chilomeniscus Cope, 1860 -- valid -- Sand Snakes, Sandsnakes
  Chilomeniscus cinctus Cope, 1861 -- invalid -- Banded Sand Snake, Culebra-arenera bandada
  Chilomeniscus punctatissimus Van Denburgh and Slevin, 1921 -- invalid -- Culebra-arenera punteada
  Chilomeniscus savagei Cliff, 1954 -- valid -- Culebra-arenera de Cerralvo, Savage's Sand Snake
  Chilomeniscus stramineus Cope, 1860 -- valid -- Variable Sandsnake, Culebra-arenera manchada
  Chionactis Cope, 1860 -- valid -- Shovel-nosed Snakes
  Chionactis occipitalis (Hallowell, 1854) -- valid -- Western Shovel-nosed Snake, Culebra-nariz de pala del oeste, Western Shovelnose Snake, Mojave Shovelnose Snake, Mohave Shovel-nosed Snake
  Chionactis palarostris (Klauber, 1937) -- valid -- Sonoran Shovel-nosed Snake, Culebra-nariz de pala sonorense, Sonoran Shovelnose Snake
  Chiropterotriton Taylor, 1944 -- valid -- splayfoot salamanders
  Chiropterotriton arboreus (Taylor, 1941) -- valid -- Salamandra-pie plano arbórea
  Chiropterotriton chiropterus (Cope, 1863) -- valid -- Salamandra-pie plano común
  Chiropterotriton chondrostega (Taylor, 1941) -- valid -- Salamandra-pie plano cartilaginosa
  Chiropterotriton dimidiatus (Taylor, 1940) -- valid -- Salamandra-pie plano enana
  Chiropterotriton lavae (Taylor, 1942) -- valid -- Salamandra-pie plano pigmea
  Chiropterotriton magnipes Rabb, 1965 -- valid -- Salamandra-pie plano patona
  Chiropterotriton mosaueri (Woodall, 1941) -- valid -- Salamandra-pie plano de caverna
  Chiropterotriton multidentatus (Taylor, 1939) -- valid -- Salamandra-pie plano multidentada
  Chiropterotriton priscus Rabb, 1956 -- valid -- Salamandra-pie plano primitiva
  Chrysemys Gray, 1844 -- valid -- Painted Turtles
  Chrysemys picta (Schneider, 1783) -- valid -- Painted Turtle, Tortuga pintada, tortue peinte, Eastern Painted Turtle
  Claudius Cope, 1865 -- valid -- Narrow-bridged Musk Turtles
  Claudius angustatus Cope, 1865 -- valid -- Tortuga-almizclera chopontil, Narrow-bridged Musk Turtle, Chopontil
  Clelia Fitzinger, 1826 -- valid
  Clelia clelia (Daudin, 1803) -- valid -- Culebra-viborera común
  Clelia scytalina (Cope, 1867) -- valid -- Culebra-viborera mexicana, Mexican Snake Eater
  Clemmys Ritgen, 1828 -- valid -- marsh turtles, pond turtles, Spotted Turtles
  Clemmys marmorata (Baird and Girard, 1852) -- invalid -- western pond turtle, Tortuga marmoleada, Pacific pond turtle
  Cnemidophorus Wagler, 1830 -- valid -- Racerunners, Whiptails
  Cnemidophorus alpinus Maslin and Walker, 1965 -- invalid -- Huico alpino, Alpine Whiptail, Corredora Alpina
  Cnemidophorus angusticeps Cope, 1878 -- invalid -- Huico yucateco
  Cnemidophorus bacatus Van Denburgh and Slevin, 1921 -- invalid -- Huico de Nolasco, Huico de San Pedro Nolasco, San Pedro Nolasco Whiptail
  Cnemidophorus burti Taylor, 1938 -- invalid -- Huico de cañón o punteado de cañón, Canyon Spotted Whiptail
  Cnemidophorus calidipes Duellman, 1955 -- invalid -- Huico de Tepalcatepec
  Cnemidophorus canus Van Denburgh and Slevin, 1921 -- invalid -- Huico de Salsipuedes, Isla Salsipuedas Whiptail, Huico de la Isla Salsipuedes
  Cnemidophorus catalinensis Van Denburgh and Slevin, 1921 -- invalid -- Huico de Santa Catalina
  Cnemidophorus celeripes Dickerson, 1919 -- invalid -- Huico de San José
  Cnemidophorus ceralbensis (Van Denburgh and Slevin, 1921) -- invalid -- Huico de Cerralbo
  Cnemidophorus communis Cope, 1878 -- invalid -- Huico Moteado-gigante
  Cnemidophorus costatus Cope, 1878 -- invalid -- Huico del Oeste-mexicano
  Cnemidophorus cozumela Gadow, 1906 -- invalid -- Huico de Cozumel
  Cnemidophorus deppii Wiegmann, 1834 -- invalid -- Huico siete líneas
  Cnemidophorus dixoni Scudday, 1973 -- invalid -- Gray-checkered Whiptail
  Cnemidophorus estebanensis Dickerson, 1919 -- invalid -- Huico de San Esteban
  Cnemidophorus exsanguis Lowe, 1956 -- invalid -- Huico chihuahuense, Chihuahuan Spotted Whiptail
  Cnemidophorus gularis Baird and Girard, 1852 -- invalid -- Texas Spotted Whiptail, Huico Texano
  Cnemidophorus guttatus Wiegmann, 1834 -- invalid -- Huico picuiliche
  Cnemidophorus hyperythrus Cope, 1863 -- invalid -- Orange-throated Whiptail, Huico Garganta Anaranjada
  Cnemidophorus inornatus Baird, 1859 -- invalid -- Little Striped Whiptail, Huico adornado
  Cnemidophorus labialis Stejneger, 1890 -- invalid -- Huico de Baja California
  Cnemidophorus laredoensis McKinney, Kay and Anderson, 1973 -- invalid -- Laredo Striped Whiptail, Huico de Laredo
  Cnemidophorus lineattissimus Cope, 1878 -- invalid -- Huico muchas líneas
  Cnemidophorus martyris Stejneger, 1891 -- invalid -- Huico de San Pedro Mártir
  Cnemidophorus maximus Cope, 1863 -- invalid -- Huico del Cabo
  Cnemidophorus mexicanus Peters, 1869 -- invalid -- Huico mexicano
  Cnemidophorus motaguae Sackett, 1941 -- invalid -- Giant Whiptail, Huico gigante
  Cnemidophorus neomexicanus Lowe and Zweifel, 1952 -- invalid -- New Mexican Whiptail, New Mexico Whiptail, Huico de Nuevo México
  Cnemidophorus opatae Wright, 1967 -- invalid -- Huico opata
  Cnemidophorus parvisocius Zweifel, 1960 -- invalid -- Huico pigmeo
  Cnemidophorus rodecki McCoy and Maslin, 1962 -- invalid -- Huico de Rodeck
  Cnemidophorus sackii Wiegmann, 1834 -- invalid
  Cnemidophorus sexlineatus (Linnaeus, 1766) -- invalid -- Six-lined Racerunner
  Cnemidophorus sonorae Lowe and Wright, 1964 -- invalid -- Sonoran Spotted Whiptail, Huico de Sonora
  Cnemidophorus tesselatus (Say in James, 1823) -- invalid -- Checkered Whiptail, Colorado Checkered Whiptail, Common Checkered Whiptail, Huico de cuadros
  Cnemidophorus tigris Baird and Girard, 1852 -- invalid -- Western Whiptail, Huico occidental
  Cnemidophorus uniparens Wright and Lowe, 1965 -- invalid -- Desert Grassland Whiptail, Huico de pastizal-desértico
  Coleonyx Gray, 1845 -- valid -- Banded Geckos
  Coleonyx brevis Stejneger, 1893 -- valid -- Texas Banded Gecko, Cuija texana
  Coleonyx elegans Gray, 1845 -- valid -- Cuija yucateca
  Coleonyx fasciatus (Boulenger, 1885) -- valid -- Cuija negra
  Coleonyx reticulatus Davis and Dixon, 1958 -- valid -- Reticulated Gecko, Reticulate Banded Gecko, Cuija reticulada, Big Bend gecko
  Coleonyx switaki (Murphy, 1974) -- valid -- Barefoot Gecko, Cuija descalza, Switak's Banded Gecko
  Coleonyx variegatus (Baird, 1859) -- valid -- Western Banded Gecko, Cuija occidental
  Coluber Linnaeus, 1758 -- valid -- Racers
  Coluber constrictor Linnaeus, 1758 -- valid -- Racer, Culebra-corredora constrictor, Eastern Racer, North American Racer
  Colubridae Oppel, 1811 -- valid -- Colubrids, Typical Snakes
  Coniophanes Hallowell in Cope, 1860 -- valid -- Black-striped Snakes
  Coniophanes alvarezi Campbell, 1989 -- valid -- Culebra sin rayas-chiapaneca, Chiapan Stripeless Snake
  Coniophanes bipunctatus (Günther, 1858) -- valid -- Culebra dos puntos, Two-spotted Snake
  Coniophanes fissidens (Günther, 1858) -- valid -- Culebra vientre amarillo, Yellowbelly Snake
  Coniophanes imperialis (Kennicott in Baird, 1859) -- valid -- Regal Black-striped Snake, Culebra rayas negras, Black-striped Snake
  Coniophanes lateritius Cope, 1862 -- valid -- Culebra sin rayas, Stripeless Snake
  Coniophanes meridanus Schmidt and Andrews, 1936 -- valid -- Culebra sin rayas-peninsular, Peninsula Stripeless Snake
  Coniophanes piceivittis Cope, 1869 -- valid -- Culebra rayada-de Cope, Cope's Black-striped Snake
  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 pulcher Cope, 1869 -- invalid -- Culebra-guardacaminos hermosa
  Conophis vittatus Peters, 1860 -- valid -- Culebra-guardacaminos rayada, Striped Road Guarder
  Conopsis Günther, 1858 -- valid
  Conopsis biserialis (Taylor and H. M. Smith, 1942) -- valid -- Culebra-terrestre dos líneas, Two-lined Mexican Earth Snake
  Conopsis nasus Günther, 1858 -- valid -- Culebra-terrestre narigona, Largenose Earth Snake
  Cophosaurus Troschel, 1852 -- valid -- Greater Earless Lizards
  Cophosaurus texanus Troschel, 1852 -- valid -- Greater Earless Lizard, Lagartija-sorda mayor, Texas Greater Earless Lizard
  Corytophanes F. Boie in Schlegel, 1826 -- valid
  Corytophanes cristatus (Merrem, 1821) -- valid -- Turipache cabeza lisa, Smooth Helmeted Iguana
  Corytophanes hernandezii (Wiegmann, 1831) -- invalid
  Corytophanes percarinatus A. H. A. Duméril, 1856 -- valid -- Turipache aquillado, Keeled Helmeted Iguana, Keeled Helmeted Basilisk
  Corytophanidae -- valid -- Helmet Lizards
  Crocodylia -- invalid
  Crocodylidae -- valid -- Crocodiles
  Crocodylus Laurenti, 1768 -- valid -- Crocodiles
  Crocodylus acutus Cuvier, 1807 -- valid -- American Crocodile, Cocodrilo americano, caiman de la costa, Central American Alligator, cocodrilo, lagarto
  Crocodylus moreletii Duméril and Bibron, 1851 -- valid -- Morelet's Crocodile, Cocodrilo de Moreleti, Belize Crocodile, Central American Crocodile
  Crotalus Linnaeus, 1758 -- valid -- Rattlesnakes
  Crotalus aquilus Klauber, 1952 -- valid -- Queretaran Dusky Rattlesnake
  Crotalus atrox Baird and Girard, 1853 -- valid -- Western Diamondback Rattlesnake, Western Diamond-backed Rattlesnake, Víbora-cascabel de diamantes
  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 durissus Linnaeus, 1758 -- valid -- South American Rattlesnake, Víbora-cascabel tropical, Cascabel Rattlesnake, Central American Rattlesnake
  Crotalus enyo (Cope, 1861) -- valid -- Víbora-cascabel bajacaliforniana, Baja California Rattlesnake, Lower California Rattlesnake
  Crotalus exsul Garman, 1884 -- invalid -- Red Diamond Rattlesnake, Víbora-cascabel de Isla Cedros
  Crotalus intermedius Troschel, 1865 -- valid -- Víbora-cascabel enana, Mexican Smallhead Rattlesnake
  Crotalus lannomi Tanner, 1966 -- valid -- Víbora-cascabel de Autlán, Autlán Long-tailed Rattlesnake, Manantlán Long-tailed Rattlesnake
  Crotalus lepidus (Kennicott, 1861) -- valid -- Rock Rattlesnake, Víbora-cascabel variable
  Crotalus mitchellii (Cope, 1861) -- valid -- Speckled Rattlesnake
  Crotalus molossus Baird and Girard, 1853 -- valid -- Black-tailed Rattlesnake, Víbora-cascabel cola negra, Western Black-tailed Rattlesnake
  Crotalus polystictus (Cope, 1865) -- valid -- Víbora-cascabel ocelada, Mexican Lancehead Rattlesnake
  Crotalus pricei Van Denburgh, 1895 -- valid -- Twin-spotted Rattlesnake, Víbora-cascabel motas gemelas
  Crotalus pusillus Klauber, 1952 -- valid -- Víbora-cascabel de Tancítaro, Tancitaran Dusky Rattlesnake
  Crotalus ruber Cope, 1892 -- valid -- Red Diamond Rattlesnake, Víbora-cascabel colorada
  Crotalus scutulatus (Kennicott, 1861) -- valid -- Mojave Rattlesnake, Mohave Rattlesnake, Víbora-cascabel del Altiplano, Green Rattlesnake
  Crotalus stejnegeri Dunn, 1919 -- valid -- Víbora-cascabel cola larga, Sinaloan Long-tailed Rattlesnake
  Crotalus tigris Kennicott, 1859 -- valid -- Tiger Rattlesnake, Víbora-cascabel tigre
  Crotalus tortugensis Van Denburgh and Slevin, 1921 -- invalid -- Víbora-cascabel de Isla Tortuga, Tortuga Island Rattlesnake
  Crotalus transversus Taylor, 1944 -- valid -- Víbora-cascabel bandas cruzadas, Cross-banded Mountain Rattlesnake
  Crotalus triseriatus (Wagler, 1830) -- valid -- Víbora-cascabel transvolcánica, Western Dusky Rattlesnake, Central Plateau Dusky Rattlesnake
  Crotalus viridis (Rafinesque, 1818) -- valid -- Western Rattlesnake, Prairie Rattlesnake, Víbora-cascabel occidental
  Crotalus willardi Meek, 1905 -- valid -- Ridge-nosed Rattlesnake, Víbora-cascabel bigotuda
  Crotaphytidae -- valid -- Collared Lizards, Leopard Lizards
  Crotaphytus Holbrook, 1842 -- valid -- Collared Lizards
  Crotaphytus collaris (Say in James, 1823) -- valid -- Collared Lizard, Eastern Collared Lizard, Lagartija-de collar común
  Crotaphytus insularis Van Denburgh and Slevin, 1921 -- valid -- Black-collared Lizard, Desert Collared Lizard, Lagartija-de collar negra, Eastern Collared Lizard
  Crotaphytus reticulatus Baird, 1859 -- valid -- Reticulate Collared Lizard, Lagartija-de collar reticulada
  Cryophis Bogert and Duellman, 1963 -- valid
  Cryophis hallbergi Bogert and Duellman, 1963 -- valid -- Culebra-de nebklina de Hallberg, Hallberg's Cloud Forest Snake
  Ctenosaura Wiegmann, 1828 -- valid -- Spiny-tailed Iguanas
  Ctenosaura acanthura (Shaw, 1802) -- valid -- Iguana-espinosa del Golfo, Northeastern Spinytail Iguana, Veracruz Spiny-tailed Iguana
  Ctenosaura hemilopha (Cope, 1863) -- valid -- Iguana-espinosa de Sonora, Short-crested Spiny-tailed Iguana, Baja California Spiny-tailed Iguana, Cape Spinytail Iguana
  Ctenosaura pectinata (Wiegmann, 1834) -- valid -- Mexican Spiny-tailed Iguana, Iguana-espinosa mexicana, Spiny-tailed Iguana, Western Spiny-tailed Iguana, Guerreran Spiny-tailed Iguana
  Ctenosaura similis (Gray, 1831) -- valid -- Black Spiny-tailed Iguana, Iguana-espinosa rayada, Common Spiny-tailed Iguana, Black Iguana
  Dendrophidion Fitzinger, 1843 -- valid
  Dendrophidion vinitor H. M. Smith, 1941 -- valid -- Culebra-corredora barrada, Barred Forest Racer
  Dendrotriton Wake and Elias, 1983 -- valid -- bromeliad salamanders
  Dendrotriton megarhinus (Rabb, 1960) -- valid -- Salamandra-de bromelia narigona
  Dendrotriton xolocalcae (Taylor, 1941) -- valid -- Salamandra-de bromelia de Xolocalca
  Dermatemydidae Gray, 1870 -- valid -- River Turtles
  Dermatemys Gray, 1847 -- valid -- Central American River Turtles
  Dermatemys mawii Gray, 1847 -- valid -- Tortuga-riverina centroamericana, Central American River Turtle, Tortuga Blanca, Hicatee
  Dermochelyidae Fitzinger, 1843 -- valid -- leatherback turtles, Leatherback Sea Turtles
  Dermochelys Blainville, 1816 -- valid -- Leatherback Sea Turtles
  Dermochelys coriacea (Vandelli, 1761) -- valid -- Leatherback, Tortuga-marina laúd, tinglar, tortue luth, Leatherback Sea Turtle
  Dermophis Peters, 1880 -- valid -- Mexican caecilians
  Dermophis mexicanus (Duméril and Bibron, 1841) -- valid -- Cecilia mexicana
  Dermophis oaxacae (Mertens, 1930) -- valid -- Cecilia oaxaqueña
  Diadophis Baird and Girard, 1853 -- valid -- Ring-necked Snakes
  Diadophis punctatus (Linnaeus, 1766) -- valid -- Ring-necked Snake, Culebra de collar, Ringneck Snake, couleuvre à collier
  Dibamidae Boulenger, 1884 -- valid -- blind skinks
  Dipsas Laurenti, 1768 -- valid
  Dipsas brevifacies (Cope, 1866) -- valid -- Culebra-caracolera chata, Snail-eating Thirst Snake
  Dipsas gaigeae (Oliver, 1937) -- valid -- Culebra-caracolera de Gaige, Gaige's Thirst Snail-eater
  Dipsosaurus Hallowell, 1854 -- valid -- Desert Iguanas
  Dipsosaurus dorsalis (Baird and Girard, 1852) -- valid -- Desert Iguana, Iguana de desierto, Common Desert Iguana
  Dryadophis Stuart, 1938 -- invalid
  Dryadophis cliftoni Hardy, 1964 -- invalid -- Culebra-lagartijera de Clifton
  Dryadophis melanolomus (Cope, 1868) -- invalid -- Culebra-lagartijera común
  Drymarchon Fitzinger, 1843 -- valid -- Indigo Snakes
  Drymarchon corais (F. Boie, 1827) -- valid -- Indigo Snake, Yellow-tail Cribo
  Drymobius Fitzinger, 1843 -- valid -- Neotropical Racers
  Drymobius chloroticus (Cope, 1886) -- valid -- Culebra-corredora verdosa, Green Highland Racer
  Drymobius margaritiferus (Schlegel, 1837) -- valid -- Central American Speckled Racer, Culebra-corredora de Petatillos, Speckled Racer
  Duellmanohyla Campbell and Smith, 1992 -- valid
  Duellmanohyla chamulae (Duellman, 1961) -- valid -- Rana-arroyera chamula
  Duellmanohyla ignicolor (Duellman, 1961) -- valid -- Rana-arroyera de Sierra de Juárez
  Duellmanohyla schmidtorum (Stuart, 1954) -- valid -- Rana-arroyera de Schmidt
  Elaphe Fitzinger in Wagler, 1833 -- valid -- Corn Snakes, Fox Snakes, Rat Snakes, Ratsnakes
  Elaphe bairdi (Yarrow, 1880) -- invalid -- Baird's Rat Snake, Baird's Ratsnake, Culebra-ratonera de Baird
  Elaphe flavirufa (Cope, 1867) -- invalid -- Culebra-ratonera tropical
  Elaphe guttata (Linnaeus, 1766) -- invalid -- Corn Snake, Cornsnake, Culebra-ratonera de maiz
  Elaphe obsoleta (Say in James, 1823) -- invalid -- Texas Ratsnake
  Elaphe phaescens Dowling, 1952 -- invalid -- Culebra-ratonera yucateca
  Elapidae F. Boie, 1827 -- valid -- Cobras, Coral Snakes, Elapids, Kraits, Coralsnakes
  Eleutherodactylus Duméril and Bibron, 1841 -- valid -- Coquis, Eleuths, Rainfrogs, Chirping Frogs, Robber Frogs, Rain Frogs
  Eleutherodactylus alfredi (Boulenger, 1898) -- invalid -- Rana-ladrona de Alfred
  Eleutherodactylus angustidigitorum (Taylor, 1940) -- valid -- Rana-fisgona de Pátzcuaro
  Eleutherodactylus augusti (Dugès in Brocchi, 1879) -- invalid -- Barking Frog, Rana-ladradora común
  Eleutherodactylus batrachylus Taylor, 1940 -- invalid -- Rana-ladrona tamaulipeca
  Eleutherodactylus berkenbuschii (Peters, 1870) -- invalid
  Eleutherodactylus brocchi (Boulenger in Brocchi, 1882) -- invalid -- Rana-ladrona de Brocch
  Eleutherodactylus cystignathoides (Cope, 1877) -- valid -- Rana-chirriadora mexicana, Rio Grande Chirping Frog
  Eleutherodactylus decoratus Taylor, 1942 -- invalid -- Rana-ladrona adornada
  Eleutherodactylus dennisi (Lynch, 1970) -- valid -- Rana-chirriadora de Dennis
  Eleutherodactylus dilatus (Davis and Dixon, 1955) -- valid -- Rana-fisgona guerrerense
  Eleutherodactylus dixoni Lynch, 1991 -- invalid -- Rana-fisgona labios blancos
  Eleutherodactylus glaucus Lynch, 1967 -- invalid -- Rana-ladrona gris
  Eleutherodactylus grandis (Dixon, 1957) -- valid -- Rana-fisgona mayor
  Eleutherodactylus greggi Bumzahem, 1955 -- invalid -- Rana-ladrona de Gregg
  Eleutherodactylus guerreroensis Lynch, 1967 -- invalid -- Rana-ladrona guerrerense
  Eleutherodactylus guttilatus (Cope, 1879) -- valid -- Rana-chirriadora punteada, Spotted Chirping Frog
  Eleutherodactylus hobartsmithi Taylor, 1937 -- invalid -- Rana-ladrona de Smith
  Eleutherodactylus interorbitalis (Langebartel and Shannon, 1956) -- valid -- Rana-chirriadora anteojuda
  Eleutherodactylus laticeps (Duméril, 1853) -- invalid -- Rana-ladrona cabeza ancha
  Eleutherodactylus leprus (Cope, 1879) -- valid -- Rana-chirriadora leprosa
  Eleutherodactylus lineatus (Brocchi, 1879) -- invalid -- Rana-ladrona de montaña
  Eleutherodactylus longipes (Baird, 1859) -- valid -- Rana-chirriadora de la Huasteca
  Eleutherodactylus marnockii (Cope, 1878) -- valid -- Cliff Chirping Frog
  Eleutherodactylus matudai Taylor, 1941 -- invalid -- Rana-chirriadora de Matuda
  Eleutherodactylus maurus Hedges, 1989 -- valid -- Rana-fisgona café
  Eleutherodactylus megalotympanum Shannon and Werler, 1955 -- invalid -- Rana-ladrona de San Martín
  Eleutherodactylus mexicanus (Brocchi, 1877) -- invalid -- Rana-ladrona mexicana
  Eleutherodactylus modestus (Taylor, 1942) -- valid -- Rana-chirriadora dedos chatos
  Eleutherodactylus nitidus (Peters, 1870) -- valid -- Rana-fisgona deslumbrante
  Eleutherodactylus nivicolimae (Dixon and Webb, 1966) -- invalid -- Rana-chirriadora del Nevado de Colima
  Eleutherodactylus occidentalis Taylor, 1941 -- invalid -- Rana-ladradora costeña
  Eleutherodactylus omiltemanus (Günther, 1900) -- invalid -- Rana-ladrona de omilteme
  Eleutherodactylus pallidus (Duellman, 1958) -- valid -- Rana-chirriadora pálida
  Eleutherodactylus pipilans (Taylor, 1940) -- valid -- Rana-chirriadora pipilo
  Eleutherodactylus planirostris (Cope, 1862) -- valid -- Greenhouse Frog, Rana-ladrona de invernadero
  Eleutherodactylus polymniae Campbell, Lamar and Hillis, 1989 -- invalid -- Rana-ladrona de Sierra de Juárez
  Eleutherodactylus pygmaeus Taylor, 1937 -- invalid -- Rana-ladrona pigmea
  Eleutherodactylus rhodopis (Cope, 1867) -- invalid -- Rana-ladrona polimorfa
  Eleutherodactylus rubrimaculatus (Taylor and Smith, 1945) -- valid -- Rana-chirriadora puntos rojos
  Eleutherodactylus rufescens (Duellman and Dixon, 1959) -- valid -- Rana-fisgona roja
  Eleutherodactylus rugulosus (Cope, 1870) -- invalid -- Rana-ladrona centroamericana
  Eleutherodactylus saltator Taylor, 1941 -- invalid -- Rana-ladrona danzante
  Eleutherodactylus sartori Lynch, 1965 -- invalid -- Rana-ladrona enana-chiapaneca
  Eleutherodactylus saxatilis (Webb, 1962) -- valid -- Rana-fisgona marmoleada
  Eleutherodactylus silvicola Lynch, 1967 -- invalid -- Rana-ladrona selvática
  Eleutherodactylus spatulatus Smith, 1939 -- invalid -- Rana-ladrona espatulada
  Eleutherodactylus stuarti Lynch, 1967 -- invalid -- Rana-ladrona de Stuart
  Eleutherodactylus syristes (Hoyt, 1965) -- valid -- Rana-fisgona flautera
  Eleutherodactylus tarahumaraensis Taylor, 1940 -- invalid -- Rana-ladradora tarahumara
  Eleutherodactylus taylori Lynch, 1966 -- invalid -- Rana-ladrona de Taylor
  Eleutherodactylus teretistes (Duellman, 1958) -- valid -- Rana-ladrona silbadora
  Eleutherodactylus uno Savage, 1985 -- invalid -- Rana-ladrona de Savage
  Eleutherodactylus verrucipes (Cope, 1885) -- valid -- Rana-chirrionera orejona
  Eleutherodactylus verruculatus (Peters, 1870) -- valid -- Rana-chirrionera menor
  Eleutherodactylus vocalis Taylor, 1940 -- invalid -- Rana-ladrona sonora
  Eleutherodactylus xucanebi Stuart, 1941 -- invalid -- Rana-ladrona de xucaneb
  Eleutherodactylus yucatanensis Lynch, 1965 -- invalid -- Rana-ladrona yucateca
  Elgaria Gray, 1838 -- valid -- Western Alligator Lizards
  Elgaria kingii Gray, 1838 -- valid -- Arizona Alligator Lizard, Madrean Alligator Lizard
  Elgaria multicarinata (Blainville, 1835) -- valid -- Southern Alligator Lizard, Lagarto escorpión del Sur
  Elgaria parva (Knight and Scudday, 1985) -- invalid -- Lagarto escorpión pigmeo
  Elgaria paucicarinata (Fitch, 1934) -- valid -- Lagarto escorpión de San Lucas, San Lucan Alligator Lizard
  Emydidae Rafinesque, 1815 -- valid -- pond turtles, terrapins, Emydid Turtles
  Ensatina Gray, 1850 -- valid -- Ensatinas
  Ensatina eschscholtzii Gray, 1850 -- valid -- Salamandra ensantina, Ensatina
  Enulius Cope, 1871 -- 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
  Enyaliosaurus Gray, 1845 -- invalid
  Enyaliosaurus clarki (Bailey, 1928) -- invalid -- Garrobo del Balsas
  Enyaliosaurus defensor (Cope, 1866) -- invalid -- Garrobo yucateco
  Enyaliosaurus quinquecarinatus (Gray, 1842) -- invalid -- Garrobo oaxaqueño
  Eretmochelys Fitzinger, 1843 -- valid -- Hawksbill Sea Turtles
  Eretmochelys imbricata (Linnaeus, 1766) -- valid -- carey, Hawksbill, Tortuga-marina de carey, Hawksbill Sea Turtle
  Eridiphas Leviton and Tanner, 1960 -- invalid
  Eridiphas slevini (Tanner, 1943) -- invalid -- Culebra-nocturna de Baja California
  Eublepharidae -- valid -- Eublepharid Geckos
  Eumeces Wiegmann, 1834 -- valid -- Eumeces, Holarctic Skinks
  Eumeces altamirani Dugès, 1891 -- invalid -- Eslizón de Tepalcatepec
  Eumeces brevirostris (Günther, 1860) -- invalid -- Eslizón chato
  Eumeces colimensis Taylor, 1935 -- invalid -- Eslizón de Colima
  Eumeces copei Taylor, 1933 -- invalid -- Eslizón de Cope
  Eumeces dugesii Thominot, 1883 -- invalid
  Eumeces gilberti Van Denburgh, 1896 -- invalid -- Gilbert's Skink, Eslizón de Gilbert
  Eumeces lagunensis Van Denburgh, 1895 -- invalid -- Eslizón de San Lucas
  Eumeces lynxe Wiegmann, 1834 -- invalid -- Eslizón encinero
  Eumeces multilineatus Tanner, 1957 -- invalid -- Eslizón de Chihuahua
  Eumeces multivirgatus (Hallowell, 1857) -- invalid -- Many-lined Skink, Eslizón muchas líneas
  Eumeces obsoletus (Baird and Girard, 1852) -- invalid -- Great Plains Skink, Eslizón de la Gran Planicie
  Eumeces ochoterenae Taylor, 1933 -- invalid -- Eslizón guerrerense
  Eumeces parviauriculatus Taylor, 1933 -- invalid -- Eslizón pigmeo-norteño
  Eumeces parvulus Taylor, 1933 -- invalid -- Eslizón pigmeo-del sur
  Eumeces schwartzei Fischer, 1884 -- invalid -- Eslizón de Schwartz
  Eumeces skiltonianus (Baird and Girard, 1852) -- invalid -- Western Skink, Eslizón occidental
  Eumeces sumichrasti (Cope, 1867) -- invalid -- Eslizón listado
  Eumeces tetragrammus (Baird, 1859) -- invalid -- Four-lined Skink, Eslizón cuatro líneas
  Exiliboa Bogert, 1968 -- valid
  Exiliboa placata Bogert, 1968 -- valid -- Boa-enana oaxaqueña
  Ficimia Gray, 1849 -- valid -- Southern Hook-nosed Snakes, Mexican Hook-nosed Snakes
  Ficimia olivacea Gray, 1849 -- valid -- Culebra-naricilla huasteca
  Ficimia publia Cope, 1866 -- valid -- Culebra-naricilla manchada, Blotched Hooknose Snake
  Ficimia ramirezi H. M. Smith and Langebartel, 1949 -- valid -- Culebra-naricilla de Ramírez, Ramirez's Hooknose Snake
  Ficimia ruspator H. M. Smith and Taylor, 1941 -- valid -- Culebra-naricilla guerrerense, Guerreran Hooknose Snake
  Ficimia streckeri Taylor, 1931 -- valid -- Mexican Hook-nosed Snake, Tamaulipan Hook-nosed Snake, Culebra-naricilla mexicana, Tamaulipan Hooknose Snake, Mexican Hooknose Snake
  Ficimia variegata (Günther, 1858) -- valid -- Culebra-naricilla de Tehuantepec, Tehuantepec Hooknose Snake
  Gambelia Baird, 1859 -- valid -- Leopard Lizards
  Gambelia wislizenii (Baird and Girard, 1852) -- valid -- Long-nosed Leopard Lizard, Lagartija-leopardo narigona, Longnose Leopard Lizard
  Gastrophryne Fitzinger, 1843 -- valid -- North American Narrow-mouthed Toads, Narrow-mouthed Toads
  Gastrophryne elegans (Boulenger, 1882) -- valid -- Sapo-boca angosta elegante
  Gastrophryne olivacea (Hallowell, 1856) -- valid -- Great Plains Narrow-mouthed Toad, Sapo-boca angosta oliváceo, Western Narrow-mouthed Toad
  Gastrophryne usta (Cope, 1866) -- invalid -- Sapo-boca angosta huasteco
  Geagras Cope, 1876 -- valid
  Geagras redimitus Cope, 1876 -- valid -- Culebra-minera de Tehuantepec, Tehuantepec Striped Snake
  Gehyra Gray, 1834 -- valid -- Web-toed Geckos, Dtellas
  Gehyra mutilata (Wiegmann, 1834) -- valid -- Stump-toed Gecko, Geco plano, Mutilating Gecko
  Gekkonidae -- valid -- Geckos
  Geophis Wagler, 1830 -- valid
  Geophis anocularis Dunn, 1920 -- valid -- Culebra-minera de Sierra Mije, Sierra Mije Earth Snake
  Geophis bicolor Günther, 1868 -- valid -- Culebra-minera del Altiplano, Mexican Plateau Earth Snake
  Geophis blanchardi Taylor and H. M. Smith, 1939 -- valid -- Culebra-minera de Blanchard, Blanchard's Earth Snake
  Geophis cancellatus H. M. Smith, 1941 -- valid -- Culebra-minera de Chiapas, Chiapas Earth Snake
  Geophis carinosus Stuart, 1941 -- valid -- Culebra-minera aquillada, Keeled Earth Snake
  Geophis chalybeus (Wagler, 1830) -- valid -- Culebra-minera veracruzana, Veracruz 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 dugesi Bocourt, 1883 -- invalid -- Culebra-minera de Chihuahua
  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 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 -- culeba-minera del café, Coffee Earth Snake
  Geophis nigrocinctus Duellman, 1959 -- valid -- Culebra-minera rayas negras, Black-banded Earth Snake
  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 russatus H. M. Smith and Williams, 1966 -- valid -- Culebra-minadora roja, Red 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 -- Culebra-minadora coralillo, Coral Earth Snake
  Geophis sieboldi (Jan, 1862) -- valid -- Culebra-miandora de Siebold, Siebold's Earth Snake
  Geophis tarascae Hartweg, 1959 -- valid -- Culebra-miandora tarasca, Tarascan Earth Snake
  Gerrhonotus Wiegmann, 1828 -- valid -- Alligator Lizards
  Gerrhonotus liocephalus Wiegmann, 1828 -- valid -- Texas Alligator Lizard, Lagarto escorpión texano, Smooth-headed Alligator Lizard, Wiegmann's Alligator Lizard
  Gerrhonotus lugoi McCoy, 1970 -- valid -- Lagarto escorpión de Lugo, Lugo's Alligator Lizard
  Gonatodes Fitzinger, 1843 -- valid -- Bent-toed Geckos, American Bent-toed Geckos
  Gonatodes albogularis (Duméril and Bibron, 1836) -- valid -- Yellow-headed Gecko, Geco cabeza amarilla
  Gopherus Rafinesque, 1832 -- valid -- North American Tortoises, Gopher Tortoises
  Gopherus agassizii (Cooper, 1861) -- valid -- Desert Tortoise, Mohave Desert Tortoise, Agassiz's Desert Tortoise, Mojave Desert Tortoise
  Gopherus berlandieri (Agassiz, 1857) -- valid -- Galápago tamaulipeco, Texas Tortoise, Berlandier's Tortoise, Galapago Tamaulipas
  Gopherus flavomarginatus Legler, 1959 -- valid -- Galápago de Mapimí, Bolson Tortoise, Mexican Giant Tortoise, La Tortuga del Bolsón, Tortuga Grande, Tortuga Llanero
  Gyalopion Cope, 1860 -- valid -- Hook-nosed Snakes, Western Hook-nosed Snakes
  Gyalopion canum (Cope, 1860) -- valid -- Western Hook-nosed Snake, Chihuahuan Hook-nosed Snake, Culebra-nariz ganchuda de Chihuahua, Western Hooknose Snake
  Gyalopion quadrangulare (Günther, 1893) -- valid -- Thornscrub Hook-nosed Snake, Culebra-nariz ganchuda de desierto, Thornscrub Hooknose Snake, Desert Hooknose Snake
  Gymnophiona -- valid -- Caecilians
  Gymnophthalmidae Fitzinger, 1826 -- valid -- Spectacled Lizards
  Gymnophthalmus Merrem, 1820 -- valid -- spectacled lizards, lagartijas de anteojos
  Gymnophthalmus speciosus (Hallowell, 1861) -- valid -- Lagartija-anteojada dorada, Golden Tegulet, Golden Spectacled Tegu, Lagartija Dorada, Golden Spectacled Lizard
  Heloderma Wiegmann, 1829 -- valid -- Beaded Lizards, Gila Monsters
  Heloderma horridum (Wiegmann, 1829) -- valid -- Mexican Beaded Lizard, Beaded Lizard, Lagarto enchaquirado
  Heloderma suspectum Cope, 1869 -- valid -- Gila Monster, Lagarto de Gila
  Helodermatidae Gray, 1837 -- valid -- Venomous Lizards, Beaded Lizards, Gila Monsters
  Hemidactylus Gray, 1825 -- valid -- House Geckos, Half-toed Geckos
  Hemidactylus frenatus Schlegel, 1836 -- valid -- Common House Gecko, Geco-casero bocón, Bridled House Gecko
  Hemidactylus mabouia (Moreau De Jonnès, 1818) -- valid -- Cosmopolitan House Gecko, Afro-American House Gecko, Geco-casero tropical, Afroamerican house gecko, Wood Slave
  Hemidactylus turcicus (Linnaeus, 1758) -- valid -- Mediterranean Gekko, Mediterranean House Gecko, Geco-casero del Mediterráneo, Mediterranean Gecko
  Heterodon Latreille in Sonnini and Latreille, 1801 -- valid -- Hog-nosed Snakes, North American Hog-nosed Snakes
  Heterodon nasicus Baird and Girard, 1852 -- valid -- Western Hog-nosed Snake, Culebra-nariz de cerdo occidental, Western Hognose Snake, Plains Hognose Snake, Plains Hog-nosed Snake
  Holbrookia Girard, 1851 -- valid -- Earless Lizards, Lesser Earless Lizards
  Holbrookia lacerata Cope, 1880 -- valid -- Spot-tailed Earless Lizard, Lagartija-sorda cola punteada, Plateau Earless Lizard, Northern Spot-tailed Earless Lizard
  Holbrookia maculata Girard, 1851 -- valid -- Lesser Earless Lizard, Common Earless Lizard, Lagartija-sorda menor, Common Lesser Earless Lizard
  Holbrookia propinqua Baird and Girard, 1852 -- valid -- Keel-scaled Earless Lizard, Keeled Earless Lizard, Lagartija-sorda carinata
  Hyla Laurenti, 1768 -- valid -- Treefrogs, Holarctic Treefrogs
  Hyla altipotens Duellman, 1968 -- invalid -- Rana-de árbol vientre amarilla
  Hyla arborescandens Taylor, 1939 -- invalid -- Rana-de árbol de bromelia- menor
  Hyla arenicolor Cope, 1866 -- invalid -- Canyon Treefrog, Rana-de árbol color arena
  Hyla bistincta Cope, 1877 -- invalid -- Rana-de árbol de pliegue-mexicana
  Hyla bogertae Straughan and Wright, 1969 -- invalid -- Rana-de árbol acuática-de Bogart
  Hyla cembra Caldwell, 1974 -- invalid -- Rana-de árbol de Sierra Madre del Sur
  Hyla chaneque Duellman, 1961 -- invalid -- Rana-de árbol hada
  Hyla charadricola Duellman, 1964 -- invalid -- Rana-de árbol poblana
  Hyla chryses Adler, 1965 -- invalid -- Rana-de árbol dorada
  Hyla cinerea (Schneider, 1799) -- invalid -- Green Tree Frog, Green Treefrog
  Hyla crassa (Brocchi, 1877) -- invalid -- Rana-de árbol acuática
  Hyla cyanomma Caldwell, 1974 -- invalid -- Rana-de árbol ojos azules
  Hyla dendroscarta Taylor, 1940 -- invalid -- Rana-de árbol de bromelia-mayor
  Hyla ebraccata Cope, 1874 -- invalid -- Rana-de árbol amarillenta
  Hyla echinata Duellman, 1961 -- invalid -- Rana-de árbol de pliegue-oaxaqueña
  Hyla erythromma Taylor, 1937 -- invalid -- Rana-de árbol común
  Hyla euphorbiacea Günther, 1858 -- invalid -- Rana-de árbol de Los Altos-del Sur
  Hyla eximia Baird, 1854 -- invalid -- Mountain Treefrog, Rana-de árbol de montaña
  Hyla godmani Günther, 1901 -- invalid -- Rana-de árbol de Godman
  Hyla hazelae Taylor, 1940 -- invalid -- Rana-de árbol de Hazel
  Hyla juanitae Snyder, 1972 -- invalid -- Rana-de árbol de Juanita
  Hyla loquax Gaige and Stuart, 1934 -- invalid -- Rana-de árbol sonorense
  Hyla melanomma Taylor, 1940 -- invalid -- Rana-de árbol ojo negro
  Hyla microcephala Cope, 1886 -- invalid -- Rana-de árbol amarilla
  Hyla miotympanum Cope, 1863 -- invalid -- Rana-de árbol mixe
  Hyla mixe Duellman, 1965 -- invalid
  Hyla mixomaculata Taylor, 1950 -- invalid -- Rana-de árbol jaspeada
  Hyla mykter Adler and Dennis, 1972 -- invalid -- Rana-de árbol hocico aquillado
  Hyla nubicola Duellman, 1964 -- invalid -- Rana-de árbol de bosque mesófilo
  Hyla pachyderma Taylor, 1942 -- invalid -- Rana-de árbol semiacuática
  Hyla pellita Duellman, 1968 -- invalid -- Rana-de árbol oaxaqueña
  Hyla pentheter Adler, 1965 -- invalid -- Rana-de árbol de luto
  Hyla picta (Günther, 1901) -- invalid -- Rana-de árbol pintada
  Hyla pinorum Taylor, 1937 -- invalid -- Rana-de árbol de pinar
  Hyla plicata Brocchi, 1877 -- invalid -- Rana-de árbol plegada o surcada
  Hyla robertmertensi Taylor, 1937 -- invalid -- Rana-de árbol de Mertens
  Hyla robertsorum Taylor, 1940 -- invalid -- Rana-de árbol de Robert
  Hyla sabrina Caldwell, 1974 -- invalid -- Rana-de árbol de Sierra de Juárez
  Hyla sartori Smith, 1951 -- invalid -- Rana-de árbol de Taylor
  Hyla siopela Duellman, 1968 -- invalid -- Rana-de árbol muda
  Hyla smaragdina Taylor, 1940 -- invalid -- Rana-de árbol esmeralda
  Hyla smithii Boulenger, 1902 -- invalid -- Rana-de árbol mexicana-enana
  Hyla sumichrasti (Brocchi, 1879) -- invalid -- Rana-de árbol de sumichrast
  Hyla taeniopus Günther, 1901 -- invalid -- Rana-de árbol jarocha
  Hyla thorectes Adler, 1965 -- invalid -- Rana-de árbol moteada
  Hyla trux Adler and Dennis, 1972 -- invalid -- Rana-de árbol de espolón
  Hyla valancifer Firschein and Smith, 1956 -- invalid -- Rana-de árbol de San Martín
  Hyla walkeri Stuart, 1954 -- invalid -- Rana-de árbol de Walker
  Hylidae Rafinesque, 1815 -- valid -- Hylids, New World Tree Frogs, Treefrogs, hylidés, hylidés arboricoles, Hylid Frogs
  Hypopachus Keferstein, 1867 -- valid -- Sheep Frogs
  Hypopachus barberi Schmidt, 1939 -- valid -- Rana-oveja de Barber
  Hypopachus variolosus (Cope, 1866) -- valid -- Rana-oveja común, Northern Sheep Frog, Sheep Frog
  Hypsiglena Cope, 1860 -- valid -- Night Snakes, Nightsnakes
  Hypsiglena torquata (Günther, 1860) -- valid -- Night Snake, Nightsnake, Culebra-nocturna ojo de gato, Sinaloan Nightsnake
  Iguana Laurenti, 1768 -- valid -- Iguanas, Green Iguanas
  Iguana iguana (Linnaeus, 1758) -- valid -- Green Iguana, Iguana verde, iguane commun, Common Green Iguana
  Iguanidae -- valid -- American Arboreal Lizards, Chuckwallas, Iguanas, Iguanids
  Imantodes A. M. C. Duméril, 1853 -- valid
  Imantodes cenchoa (Linnaeus, 1758) -- valid -- Blunthead Treesnake, Fiddle-string Snake, Blunt-headed Treesnake, Culebra-cordelilla chata, Blunthead Tree Snake
  Imantodes gemmistratus (Cope, 1861) -- valid -- Culebra-cordelilla centroamericana, Central American Tree Snake
  Imantodes tenuissimus (Cope, 1867) -- valid -- Culebra-cordelilla yucateca, Yucatán Blunthead Snake
  Ixalotriton Wake and Johnson, 1989 -- valid -- jumping salamanders
  Ixalotriton niger Wake and Johnson, 1989 -- valid -- Salamandra-saltarina negra
  Kinosternidae Agassiz, 1857 -- valid -- Musk Turtles, Mud Turtles
  Kinosternon Spix, 1824 -- valid -- mud turtles, American Mud Turtles, American musk turtles
  Kinosternon acutum Gray, 1831 -- valid -- Tortuga-pecho quebrado de Tabasco, Tabasco Mud Turtle, Montera, Pochitoque
  Kinosternon alamosae Berry and Legler, 1980 -- valid -- Tortuga-pecho quebrado de Álamos, Alamos Mud Turtle, Casquito de Alamos
  Kinosternon creaseri Hartweg, 1934 -- valid -- Tortuga-pecho quebrado de Craser, Creaser's Mud Turtle, Casquito de Creaser
  Kinosternon flavescens (Agassiz, 1857) -- valid -- Tortuga-pecho quebrado amarilla, Yellow Mud Turtle, Casquito Amarillo
  Kinosternon herrerai Stejneger, 1925 -- valid -- Herrera's Mud Turtle, Tortuga-pecho quebrado de Herrera, Casquito de Herrera
  Kinosternon hirtipes Wagler, 1830 -- valid -- Mexican Rough-footed Mud Turtle, Tortuga-pecho quebrado pata rugosa, Rough-footed Mud Turtle, Rough-legged Mud Turtle, Casquito Pata Rugosa
  Kinosternon integrum Le Conte, 1854 -- valid -- Tortuga-pecho quebrado mexicana, Mexican Mud Turtle, Casquito de Burro
  Kinosternon leucostomum Duméril and Bibron in Duméril and Duméril, 1851 -- valid -- Tortuga-pecho quebrado labios blancos, White-lipped Mud Turtle, Pochitoque, Chechahua
  Kinosternon oaxacae Berry and Iverson, 1980 -- valid -- Tortuga-pecho quebrado oaxaqueña, Oaxaca Mud Turtle, Casquito de Oaxaca
  Kinosternon scorpioides (Linnaeus, 1766) -- valid -- Tortuga-pecho quebrado escorpión, Scorpion Mud Turtle
  Kinosternon sonoriense Le Conte, 1854 -- valid -- Tortuga-pecho quebrado sonorense, Sonora Mud Turtle, Casquito de Sonora
  Laemanctus Wiegmann, 1834 -- valid
  Laemanctus longipes Wiegmann, 1834 -- valid -- Lemacto coludo, Eastern Casquehead Iguana
  Laemanctus serratus Cope, 1864 -- valid -- Lemacto coronado, Serrated Casquehead Iguana
  Lampropeltis Fitzinger, 1843 -- valid -- Kingsnakes, Milk Snakes
  Lampropeltis alterna (Brown, 1901) -- valid -- Gray-banded Kingsnake, Culebra-real bandas grises, Grey-banded Kingsnake
  Lampropeltis calligaster (Harlan, 1827) -- valid -- Prairie Kingsnake, Yellow-bellied Kingsnake
  Lampropeltis getula (Linnaeus, 1766) -- valid -- Common Kingsnake, Culebra-real común, Eastern Kingsnake
  Lampropeltis mexicana (Garman, 1884) -- valid -- Gray-banded Kingsnake, Culebra-real potosina, Mexican Kingsnake
  Lampropeltis pyromelana (Cope, 1867) -- valid -- Sonoran Mountain Kingsnake, Culebra-real sonorense, Arizona Mountain Kingsnake
  Lampropeltis ruthveni Blanchard, 1920 -- valid -- Culebra-real de Ruthven, Ruthvens Kingsnake
  Lampropeltis triangulum (Lacépède, 1789) -- valid -- Eastern Milk Snake, Eastern Milksnake, Culebra-real coralillo, couleuvre tachetée
  Lampropeltis zonata (Lockington ex Blainville, 1876) -- valid -- California Mountain Kingsnake, Culebra-real californiana, St. Helena Mountain Kingsnake
  Lepidochelys Fitzinger, 1843 -- valid -- Ridley Sea Turtles
  Lepidochelys kempi (Garman, 1880) -- invalid -- Tortuga-marina escamosa-del Atlántico
  Lepidochelys olivacea (Eschscholtz, 1829) -- valid -- Pacific Ridley, Olive Ridley, Tortuga-marina escamosa-del Pacífico, Olive Ridley Sea Turtle, Pacific Ridley Sea Turtle
  Lepidophyma Duméril, 1851 -- valid
  Lepidophyma alvarezi H. M. Smith, 1973 -- invalid -- Lagartija-nocturna de Álvarez del Toro
  Lepidophyma chicoasensis Álvarez and Valentin, 1988 -- valid -- Lagartija-nocturna del Sumidero, Sumidero Tropical Night Lizard
  Lepidophyma dontomasi (H. M. Smith, 1942) -- valid -- Lagartija-nocturna de MacDougall, MacDougall's Tropical Night Lizard
  Lepidophyma flavimaculatum Duméril, 1851 -- valid -- Lagartija-nocturna puntos amarillos, Yellow-spotted Night Lizard
  Lepidophyma gaigeae Mosauer, 1936 -- valid -- Lagartija-nocturna de Gaiger, Gaige's Tropical Night Lizard
  Lepidophyma lipetzi H. M. Smith and del Toro, 1977 -- valid -- Lagartija-nocturna del Ocote, Lipetz's Tropical Night Lizard
  Lepidophyma micropholis Walker, 1955 -- valid -- Lagartija-nocturna de cueva, Cave Tropical Night Lizard
  Lepidophyma occulor H. M. Smith, 1942 -- valid -- Lagartija-nocturna de Jalapa, Japlan Tropical Night Lizard
  Lepidophyma pajapanensis Werler, 1957 -- valid -- Lagartija-nocturna de Pajapan, Pajapan Tropical Night Lizard
  Lepidophyma radula (H. M. Smith, 1942) -- valid -- Lagartija-nocturna de Yautepec, Yautepec Tropical Night Lizard
  Lepidophyma sawini H. M. Smith, 1973 -- invalid -- Lagartija-nocturna de Sawin
  Lepidophyma smithii Bocourt, 1876 -- valid -- Smith's Tropical Night Lizard
  Lepidophyma sylvaticum Taylor, 1939 -- valid -- Lagartija-nocturna de montaña, Madrean Tropical Night Lizard
  Lepidophyma tarascae R. L. Bezy, Webb and Álvarez, 1982 -- valid -- Lagartija-nocturna tarasca, Tarascan Tropical Night Lizard
  Lepidophyma tuxtlae Werler and Shannon, 1957 -- valid -- Lagartija-nocturna de Los Tuxtlas, Tuxtla Tropical Night Lizard
  Leptodactylidae Werner, 1896 -- valid -- Leptodactylids, Neotropical Frogs, grenouilles néotropicales, Leptodactylid Frogs
  Leptodactylus Fitzinger, 1826 -- valid -- Foam-nest Frogs, White-lipped Frogs, Neotropical Grass Frogs, Thin-toed Frogs, Neotropical glass frogs
  Leptodactylus labialis (Cope, 1877) -- invalid -- Rana-nidificadora labios blancos
  Leptodactylus melanonotus (Hallowell, 1861) -- valid -- Rana-nidificadora de sabinal
  Leptodeira Fitzinger, 1843 -- valid -- Cat-eyed Snakes
  Leptodeira annulata (Linnaeus, 1758) -- valid -- Culebra-ojo de gato bandada, Banded 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 -- Culebra-ojo de gato cabeza negra, Black-banded Cat-eyed Snake
  Leptodeira punctata (Peters, 1866) -- valid -- Culebra-ojo de gato occidental, Western Cat-eyed Snake
  Leptodeira septentrionalis (Kennicott in Baird, 1859) -- valid -- Cat-eyed Snake, Culebra-ojo de gato norteña o manchada, Northern Cat-eyed Snake
  Leptodeira splendida Günther, 1895 -- valid -- Culebra-ojo de gato espléndida, Splendid Cat-eyed Snake
  Leptophis Bell, 1825 -- valid
  Leptophis ahaetulla (Linnaeus, 1758) -- valid -- Culebra-perico verde, Giant Parrot Snake, Parrot Snake
  Leptophis diplotropis (Günther, 1872) -- valid -- Culebra-perico gargantilla, Pacific Coast Parrot Snake
  Leptophis mexicanus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Culebra-perico mexicana, Mexican Parrot Snake
  Leptophis modestus (Günther, 1872) -- valid -- Culebra-perico de niebla, Cloud Forest Parrot Snake
  Leptotyphlopidae Stejneger, 1892 -- valid -- Slender Blind Snakes, Thread Snakes, Threadsnakes
  Leptotyphlops Fitzinger, 1843 -- valid -- Slender Blind Snakes, Threadsnakes
  Leptotyphlops bressoni Taylor, 1939 -- invalid -- Serpiente-lombriz michoacana
  Leptotyphlops dulcis (Baird and Girard, 1853) -- invalid -- Texas Slender Blind Snake, Texas Threadsnake, Serpiente-lombriz texana
  Leptotyphlops goudotii (A. M. C. Duméril and Bibron, 1844) -- invalid
  Leptotyphlops humilis (Baird and Girard, 1853) -- invalid -- Western Slender Blind Snake, Western Threadsnake, Serpiente-lombriz occidental
  Leptotyphlops maximus Loveridge, 1932 -- invalid -- Serpiente-lombriz gigante
  Lichanura Cope, 1861 -- valid -- Rosy Boas
  Lichanura trivirgata Cope, 1861 -- valid -- Boa solocuate, Rosy Boa, Three-lined Boa, Mexican Rosy Boa
  Lineatriton Tanner, 1950 -- invalid -- lined salamanders
  Lineatriton lineolus (Cope, 1865) -- invalid
  Lissamphibia -- invalid
  Loxocemidae Cope, 1861 -- valid -- Mexican Pythons
  Loxocemus Cope, 1861 -- valid
  Loxocemus bicolor Cope, 1861 -- valid -- Mexican Burrowing Python, Serpiente chatilla
  Mabuya Fitzinger, 1826 -- valid -- Mabuyas
  Mabuya brachypoda Taylor, 1956 -- invalid -- Mabuya centroamericana
  Manolepis Cope, 1885 -- valid
  Manolepis putnami (Jan, 1863) -- valid -- Culebra cabeza surcada, Ridgehead Snake
  Masticophis Baird and Girard, 1853 -- invalid -- Coachwhips, Whipsnakes, Racers, Striped Racers
  Masticophis anthonyi (Stejneger, 1901) -- invalid -- Culebra-chirriadora de Isla Clarion
  Masticophis aurigulus (Cope, 1861) -- invalid -- Culebra-chirriadora de Baja California
  Masticophis bilineatus Jan, 1863 -- invalid -- Sonoran Whipsnake, Culebra-chirriadora sonorense
  Masticophis flagellum (Shaw, 1802) -- invalid -- Coachwhip, Culebra-chirriadora común
  Masticophis lateralis (Hallowell, 1853) -- invalid -- Striped Racer, Culebra-chirriadora rayada
  Masticophis mentovarius (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- invalid -- Culebra-chirriadora neotropical
  Masticophis taeniatus (Hallowell, 1852) -- invalid -- Striped Whipsnake, Culebra-chirriadora adornada
  Mesaspis Cope, 1877 -- invalid
  Mesaspis antauges (Cope, 1866) -- invalid -- Lagarto escorpión de Monte Orizaba, Mount Orizaba Alligator Lizard
  Mesaspis gadovii (Boulenger, 1913) -- invalid -- Gadow's Alligator Lizard
  Mesaspis juarezi (Karges and Wright, 1987) -- invalid -- Lagarto escorpión de Sierra de Juárez, Sierra Juarez Alligator Lizard
  Mesaspis moreleti (Bocourt, 1871) -- invalid -- Lagarto escorpión de Morelet
  Mesaspis viridiflava (Bocourt, 1873) -- invalid -- Lagarto escorpión enano, Dwarf Alligator Lizard
  Microhylidae Günther, 1858 -- valid -- Microhylids, Microhylid Frogs
  Micruroides K. P. Schmidt, 1928 -- valid -- Western Coral Snakes, Sonoran Coralsnakes
  Micruroides euryxanthus (Kennicott, 1860) -- valid -- Sonoran Coralsnake, Serpiente-coralillo sonorense, Western Coral Snake
  Micrurus Wagler, 1824 -- valid -- American Coral Snakes, American Coralsnakes
  Micrurus bogerti Roze, 1967 -- valid -- Serpiente-coralillo de Bogert, Bogert's Coral Snake
  Micrurus browni K. P. Schmidt and H. M. Smith, 1943 -- valid -- Serpiente-coralillo de Brown, Brown's Coral Snake
  Micrurus diastema (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Serpiente-coralillo variable, Variable Coral Snake, Diastema Coral Snake
  Micrurus distans (Kennicott, 1860) -- valid -- Serpiente-coralillo del oeste mexicano, West Mexican Coral Snake
  Micrurus elegans (Jan, 1858) -- valid -- Serpiente-coralillo elegante, Elegant Coral Snake
  Micrurus ephippifer (Cope, 1886) -- valid -- Serpiente-coralillo oaxaqueña, Oaxacan Coral Snake
  Micrurus fulvius (Linnaeus, 1766) -- valid -- Northern Coral Snake, Harlequin Coralsnake, Serpiente-coralillo arlequín, Eastern Coral Snake
  Micrurus laticollaris (W. C. H. Peters, 1870) -- valid -- Serpiente-coralillo del Balsas, Balsas Coral Snake
  Micrurus latifasciatus K. P. Schmidt, 1933 -- valid -- Serpiente-coralillo franjas anchas, Broad-ringed Coral Snake
  Micrurus limbatus Fraser, 1964 -- valid -- Serpiente-coralillo de Los Tuxtlas, Tuxtlan Coral Snake
  Micrurus nebularis Roze, 1989 -- valid -- Serpiente-coralillo de niebla, Cloud Forest Coral Snake
  Micrurus nigrocinctus (Girard, 1854) -- valid -- Serpiente-coralillo centroamericana, Central American Coral Snake
  Micrurus proximans H. M. Smith and Chrapliwy, 1958 -- valid -- Serpiente-coralillo nayarita, Nayarit Coral Snake
  Nerodia Baird and Girard, 1853 -- valid -- Water Snakes, North American Water Snakes
  Nerodia erythrogaster (Forster in Bossu, 1771) -- valid -- Plain-bellied Water Snake, Culebra-de agua vientre claro, Plainbelly Water Snake, Plain-bellied Watersnake, Red-bellied Water Snake, Redbelly Water Snake
  Nerodia fasciata (Linnaeus, 1766) -- valid -- Southern Water Snake, Southern Watersnake
  Nerodia melanogaster (Peters, 1864) -- invalid -- Culebra-de agua vientre negro
  Nerodia rhombifer (Hallowell, 1852) -- valid -- Diamondback Water Snake, Culebra-de agua de diamantes, Diamond-backed Watersnake
  Nerodia rufipunctatus (Cope, 1875) -- invalid -- Culebra-de agua cabeza angosta
  Ninia Baird and Girard, 1853 -- valid
  Ninia diademata Baird and Girard, 1853 -- valid -- Culebra-de cafetal de collar, Veracruz Ringneck Coffee Snake
  Ninia sebae (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-de cafetal espalda roja, Redback Coffee Snake
  Notophthalmus Rafinesque, 1820 -- valid -- Eastern Newts, North American Newts
  Notophthalmus meridionalis (Cope, 1880) -- valid -- Tritón manchas negras, Black-spotted Newt
  Nototriton Wake and Elias, 1983 -- valid -- moss salamanders
  Nototriton adelos Papenfuss and Wake, 1987 -- invalid -- Salamandra de Sierra de Juárez
  Nototriton alvarezdeltoroi Papenfuss and Wake, 1987 -- invalid -- Salamandra de Álvarez del Toro
  Nyctanolis Elias and Wake, 1983 -- valid -- long-limbed salamanders
  Nyctanolis pernix Elias and Wake, 1983 -- valid -- Salamandra-patas largas ágil
  Oedipina Keferstein, 1868 -- valid -- worm salamanders
  Oedipina elongata (Schmidt, 1936) -- valid -- Salamandra-lombriz centroamericana
  Ololygon Fitzinger, 1843 -- valid
  Ololygon staufferi (Cope, 1865) -- invalid -- Rana-de árbol de Stauffer
  Opheodrys Fitzinger, 1843 -- valid -- Green Snakes, Greensnakes
  Opheodrys aestivus (Linnaeus, 1766) -- valid -- Rough Green Snake, Rough Greensnake, Culebra-verde rugosa
  Opheodrys vernalis (Harlan, 1827) -- valid -- Smooth Greensnake, Culebra-verde lisa, Smooth Green Snake
  Ophisaurus Daudin, 1803 -- valid -- Glass Lizards
  Ophisaurus attenuatus Baird in Cope, 1880 -- valid -- Slender Glass Lizard
  Ophisaurus ceroni Holman, 1965 -- valid -- Lagarto de cristal de Ceron, Ceron's Glass Lizard
  Ophisaurus incomptus McConkey, 1955 -- valid -- Lagarto de cristal cuello simple, Plainneck Glass Lizard
  Ophryacus Cope, 1887 -- valid
  Ophryacus undulatus (Jan, 1859) -- valid -- Slender-horned Pitviper, Mexican Horned Pit Viper
  Oxybelis Wagler, 1830 -- valid -- Vine Snakes, Vinesnakes
  Oxybelis aeneus (Wagler, 1824) -- valid -- Brown Vine Snake, Brown Vinesnake, Culebra-bejuquilla mexicana, Mexican Vine Snake
  Oxybelis fulgidus (Daudin, 1803) -- valid -- Culebra-bejuquilla verde
  Oxyrhopus Wagler, 1830 -- valid
  Oxyrhopus petola (Linnaeus, 1758) -- invalid -- Calico Snake, Culebra-encendida de Cálico
  Pachymedusa Duellman, 1968 -- invalid
  Pachymedusa dacnicolor (Cope, 1864) -- invalid -- Rana-de árbol mexicana
  Parvimolge Taylor, 1944 -- valid -- dwarf salamanders
  Parvimolge townsendi (Dunn, 1922) -- valid -- Salamandra-enana de Townsend
  Pelamis Daudin, 1803 -- invalid -- Yellow-bellied Sea Snakes, Yellow-bellied Seasnakes
  Pelamis platurus (Linnaeus, 1766) -- invalid -- Yellow-bellied Sea Snake, Yellow-bellied Seasnake, Serpiente-marina pelágica
  Pelobatidae Bonaparte, 1850 -- valid -- Archaic Frogs, Pelobatids, Spadefoots
  Petrosaurus Boulenger, 1885 -- valid -- Rock Lizards
  Petrosaurus mearnsi (Stejneger, 1894) -- valid -- Banded Rock Lizard, Lagartija-de piedra rayada
  Petrosaurus thalassinus (Cope, 1863) -- valid -- Lagartija-de piedra bajacaliforniana, Baja California Rock Lizard
  Phrynohyas Fitzinger, 1843 -- invalid
  Phrynohyas venulosa (Laurenti, 1768) -- invalid -- Veined Frog, Rana-de árbol lechosa
  Phrynosoma Wiegmann, 1828 -- valid -- Horned Lizards
  Phrynosoma asio Cope, 1864 -- valid -- Lagartija-cornuda gigante, Giant Horned Lizard
  Phrynosoma braconnieri A. M. C. Duméril and Bocourt, 1870 -- valid -- Lagartija-cornuda cola corta, Short-tail Horned Lizard
  Phrynosoma cerroense Stejneger, 1893 -- valid -- Lagartija-cornuda de Isla Cedros, Cedros Island Horned Lizard
  Phrynosoma cornutum (Harlan, 1825) -- valid -- Texas Horned Lizard, Lagartija-cornuda texana
  Phrynosoma coronatum (Blainville, 1835) -- valid -- Coast Horned Lizard, Lagartija-cornuda de litoral
  Phrynosoma ditmarsi Stejneger, 1906 -- valid -- Lagartija-cornuda de roca, Rock Horned Lizard
  Phrynosoma douglasii (Bell, 1829) -- valid -- Pygmy Short-horned Lizard, Short-horned Lizard, Pigmy Short-horned Lizard
  Phrynosoma mcallii (Hallowell, 1852) -- valid -- Flat-tailed Horned Lizard, Lagartija-cornuda cola plana, Flat-tail Horned Lizard
  Phrynosoma modestum Girard in Baird and Girard, 1852 -- valid -- Round-tailed Horned Lizard, Lagartija-cornuda cola redonda, Roundtail Horned Lizard
  Phrynosoma orbiculare (Linnaeus, 1758) -- valid -- Lagartija-cornuda de montaña, Mountain Horned Lizard
  Phrynosoma platyrhinos Girard in Baird and Girard, 1852 -- valid -- Desert Horned Lizard, Lagartija-cornuda de desierto
  Phrynosoma solare Gray, 1845 -- valid -- Regal Horned Lizard, Lagartija-cornuda real
  Phrynosoma taurus Bocourt in A. M. C. Duméril and Bocourt, 1870 -- valid -- Lagartija-cornuda toro o mexicana, Mexican Horned Lizard
  Phrynosomatidae -- valid -- North American Spiny Lizards
  Phyllodactylus Gray, 1828 -- valid -- Leaf-toed Geckos
  Phyllodactylus angelensis Dixon, 1966 -- valid -- Salamanquesa de Isla Ángel
  Phyllodactylus apricus Dixon, 1966 -- valid -- Salamanquesa de Las Ánimas
  Phyllodactylus bordai Taylor, 1942 -- valid -- Salamanquesa de Guerrero
  Phyllodactylus bugastrolepis Dixon, 1966 -- valid -- Salamanquesa de Isla Catalina
  Phyllodactylus davisi Dixon, 1964 -- valid -- Salamanquesa de Davis
  Phyllodactylus delcampoi Mosauer, 1936 -- valid -- Salamanquesa de Del Campo
  Phyllodactylus duellmani Dixon, 1960 -- valid -- Salamanquesa de Duellman
  Phyllodactylus homolepidurus H. Smith, 1935 -- valid -- Salamanquesa sonorense
  Phyllodactylus lanei H. Smith, 1935 -- valid -- Salamanquesa patas de res
  Phyllodactylus muralis Taylor, 1940 -- valid -- Salamanquesa oaxaqueña
  Phyllodactylus nocticolus Dixon, 1964 -- valid -- Peninsular Leaf-toed Gecko, Peninsula Leaf-toed Gecko, Salamanquesa insular
  Phyllodactylus partidus Dixon, 1966 -- valid -- Salamanquesa de partida norte
  Phyllodactylus paucituberculatus Dixon, 1960 -- valid -- Salamanquesa de río Marqués
  Phyllodactylus santacruzensis Dixon, 1966 -- valid -- Salamanquesa de Santa Cruz
  Phyllodactylus tinklei Dixon, 1966 -- valid -- Salamanquesa de Isla Rasa
  Phyllodactylus tuberculosus Wiegmann, 1834 -- valid -- Salamanquesa vientre amarillo
  Phyllodactylus unctus (Cope, 1863) -- valid -- Salamanquesa de San Lucas
  Phyllodactylus xanti Cope, 1863 -- valid -- Salamanquesa del Cabo, Xantus Leaf-toed Gecko
  Phyllorhynchus Stejneger, 1890 -- valid -- Leaf-nosed Snakes
  Phyllorhynchus browni Stejneger, 1890 -- valid -- Saddled Leaf-nosed Snake, Culebra-nariz lanceolada ensillada, Saddled Leafnose Snake, Pima Leafnose Snake, Maricopa Leafnose Snake
  Phyllorhynchus decurtatus (Cope, 1868) -- valid -- Spotted Leaf-nosed Snake, Culebra-nariz lanceolada pinta, Spotted Leafnose Snake
  Physalaemus Fitzinger, 1826 -- valid
  Physalaemus pustulosus (Cope, 1864) -- invalid -- Guayaquil Dwarf Frog, Rana tungara
  Pipidae Gray, 1825 -- valid -- Tongueless Frogs
  Pituophis Holbrook, 1842 -- valid -- Bullsnakes, Gopher Snakes, Pine Snakes, Pinesnakes, Gophersnakes
  Pituophis deppei (A. M. C. Duméril, 1853) -- valid -- Culebra-sorda mexicana, Mexican Bull Snake, Mexican Pine Snake
  Pituophis lineaticollis (Cope, 1861) -- valid -- Culebra-sorda centroamericana, Middle American Gopher Snake, Cincuate Bull Snake
  Pituophis melanoleucus (Daudin, 1803) -- valid -- Pine Snake, Pinesnake, Culebra-sorda toro, Eastern Pine Snake, Eastern Pinesnake
  Plectrohyla Brocchi, 1877 -- valid
  Plectrohyla acanthodes Duellman and Campbell, 1992 -- valid -- Rana-dedos delgados espinosa
  Plectrohyla avia Stuart, 1952 -- valid -- Rana-dedos delgados mayor
  Plectrohyla guatemalensis Brocchi, 1877 -- valid -- Rana-dedos delgados de Guatemala
  Plectrohyla hartwegi Duellman, 1968 -- valid -- Rana-dedos delgados de Hartweg
  Plectrohyla ixil Stuart, 1942 -- valid -- Rana-dedos delgados ixil
  Plectrohyla lacertosa Bumzahem and Smith, 1954 -- valid -- Rana-dedos delgados ojona
  Plectrohyla matudai Hartweg, 1941 -- valid -- Rana-dedos delgados de Matuda
  Plectrohyla pycnochila Rabb, 1959 -- valid -- Rana-dedos delgados labios anchos
  Plectrohyla sagorum Hartweg, 1941 -- valid -- Rana-dedos delgados arcana
  Plethodontidae Gray, 1850 -- valid -- Lungless Salamanders
  Pliocercus Cope, 1860 -- valid
  Pliocercus andrewsi H. M. Smith, 1942 -- invalid -- Culebra-imita coral de Andrew
  Pliocercus bicolor H. M. Smith, 1941 -- invalid -- Culebra-imita coral bicolor
  Pliocercus elapoides Cope, 1860 -- valid -- Culebra-imita coral común, Variegated False Coral Snake
  Porthidium Cope, 1871 -- valid
  Porthidium dunni (Hartweg and Oliver, 1938) -- valid -- Nauyaca-nariz de cerdo oxaqueña, Dunn's Hognose Viper
  Porthidium hespere (Campbell, 1976) -- valid -- Nauyaca-nariz de cerdo de Tecomán, Western Hognose Viper
  Porthidium melanurum (Müller, 1924) -- invalid -- Nauyaca-nariz de cerdo cornuda
  Porthidium nasutum (Bocourt, 1868) -- valid -- Nauyaca-nariz de cerdo narigona, Hognosed Pit Viper
  Porthidium yucatanicum (H. M. Smith, 1941) -- valid -- Nauyaca-nariz de cerdo yucateca
  Pseudacris Fitzinger, 1843 -- valid -- Chorus Frogs, Spring Peepers
  Pseudacris cadaverina (Cope, 1866) -- valid -- Rana-de coro californiana, California Chorus Frog, California Treefrog
  Pseudacris clarkii (Baird, 1854) -- valid -- Spotted Chorus Frog
  Pseudacris regilla (Baird and Girard, 1852) -- valid -- Northern Pacific Treefrog, Rana-de coro del pacífico, Pacific Chorus Frog, Pacific Treefrog
  Pseudacris streckeri Wright and Wright, 1933 -- valid -- Strecker's Chorus Frog
  Pseudemys Gray, 1856 -- valid -- red-bellied turtles, Cooters, cooter turtles
  Pseudemys gorzugi Ward, 1984 -- valid -- Tortuga del Río Bravo, Rio Grande Cooter, Jicotea del Rio Bravo
  Pseudoeurycea Taylor, 1944 -- valid -- false brook salamanders
  Pseudoeurycea altamontana (Taylor, 1939) -- valid -- Tlaconete morelense
  Pseudoeurycea anitae Bogert, 1967 -- valid -- Tlaconete de Anita
  Pseudoeurycea bellii (Gray, 1850) -- invalid
  Pseudoeurycea brunnata Bumzahem and Smith, 1955 -- valid -- Tlaconete café
  Pseudoeurycea cephalica (Cope, 1889) -- invalid -- Tlaconete regordete
  Pseudoeurycea cochranae (Taylor, 1943) -- valid -- Tlaconete de Cochran
  Pseudoeurycea conanti Bogert, 1967 -- valid -- Tlaconete de Conant
  Pseudoeurycea firscheini Shannon and Werler, 1955 -- valid -- Tlaconete de Firschein
  Pseudoeurycea gadovii (Dunn, 1926) -- valid
  Pseudoeurycea galeanae (Taylor, 1941) -- invalid -- Tlaconete de Galeana
  Pseudoeurycea goebeli (Schmidt, 1936) -- valid -- Tlaconete de Goebel
  Pseudoeurycea juarezi Regal, 1966 -- valid -- Tlaconete de Sierra de Juárez
  Pseudoeurycea leprosa (Cope, 1869) -- valid -- Tlaconete leproso
  Pseudoeurycea longicauda Lynch, Wake and Yang, 1983 -- valid -- Tlaconete cola larga
  Pseudoeurycea melanomolga (Taylor, 1941) -- valid -- Tlaconete negro
  Pseudoeurycea mystax Bogert, 1967 -- valid -- Tlaconete bigotudo
  Pseudoeurycea nigromaculata (Taylor, 1941) -- valid -- Tlaconete manchas negras
  Pseudoeurycea parva Lynch and Wake, 1989 -- invalid -- Tlaconete enano
  Pseudoeurycea praecellens (Rabb, 1955) -- invalid -- Tlaconete fino
  Pseudoeurycea rex (Dunn, 1921) -- valid -- Tlaconete real
  Pseudoeurycea robertsi (Taylor, 1939) -- valid -- Tlaconete de Robert
  Pseudoeurycea saltator Lynch and Wake, 1989 -- valid -- Tlaconete saltarín
  Pseudoeurycea scandens Walker, 1955 -- invalid -- Tlaconete tamaulipeco
  Pseudoeurycea smithi (Taylor, 1939) -- valid -- Tlaconete de Smith
  Pseudoeurycea unguidentis (Taylor, 1941) -- valid -- Tlaconete diente espolón
  Pseudoeurycea werleri Darling and Smith, 1954 -- valid -- Tlaconete de Werler
  Pseudoficimia Bocourt, 1883 -- valid
  Pseudoficimia frontalis (Cope, 1864) -- valid -- Culebra ilamacoa, False Ficimia
  Pseudoleptodeira Taylor, 1939 -- valid
  Pseudoleptodeira latifasciata (Günther, 1894) -- valid -- Culebra-ojo de gato-falsa cabeza roja, False Cat-eyed Snake
  Pseustes Fitzinger, 1843 -- invalid
  Pseustes poecilonotus (Günther, 1858) -- invalid -- Culebra resoplona norteña
  Pternohyla Boulenger, 1882 -- invalid -- Burrowing Treefrogs
  Pternohyla dentata Smith, 1957 -- invalid -- Rana-de árbol de tierras altas
  Pternohyla fodiens Boulenger, 1882 -- invalid -- Lowland Burrowing Treefrog, Rana-de árbol de tierras bajas
  Ptychohyla Taylor, 1944 -- valid
  Ptychohyla euthysanota (Kellogg, 1928) -- valid -- Rana-de árbol guerrerense
  Ptychohyla leonhardschultzei (Ahl, 1934) -- valid -- Rana-de árbol de Schultze
  Ramphotyphlops Fitzinger, 1843 -- valid -- Long-tailed Blind Snakes, Long Tailed Blindsnakes
  Ramphotyphlops braminus (Daudin, 1803) -- invalid -- Brahminy Blind Snake, Brahminy Blindsnake, Serpiente-ciega de Braminy
  Rana Linnaeus, 1758 -- valid -- True Frogs, Brown Frogs
  Rana aurora Baird and Girard, 1852 -- valid -- Red-legged Frog, Rana pata roja, Northern Red-legged Frog
  Rana berlandieri Baird, 1859 -- invalid -- Rio Grande Frog, Rio Grande Leopard Frog, Rana del Río Grande
  Rana boylii Baird, 1854 -- valid -- Rana pata amarilla, Foothill Yellow-legged Frog
  Rana brownorum Sanders, 1973 -- invalid
  Rana catesbeiana Shaw, 1802 -- invalid -- American Bullfrog, Rana toro, ouaouaron, Bullfrog
  Rana chiricahuensis Platz and Mecham, 1979 -- invalid -- Chiricahua Leopard Frog, Rana de chiricahua
  Rana dunni Zweifel, 1957 -- invalid -- Rana de Pátzcuaro
  Rana forreri Boulenger, 1883 -- invalid -- Rana de Forrer
  Rana johni Blair, 1965 -- invalid -- Rana de Moore
  Rana maculata Brocchi, 1877 -- invalid -- Rana de Los Altos
  Rana magnaocularis Frost and Bagnara, 1974 -- invalid -- Rana del noroeste-mexicano
  Rana montezumae Baird, 1854 -- invalid -- Rana de Moctezuma
  Rana neovolcanica Hillis and Frost, 1985 -- invalid -- Rana neovolcánica
  Rana omiltemana Günther, 1900 -- invalid -- Rana guerrerense
  Rana pueblae Zweifel, 1955 -- invalid -- Rana poblana
  Rana pustulosa Boulenger, 1883 -- invalid -- Rana de cascada
  Rana sierramadrensis Taylor, 1939 -- invalid -- Rana de Sierra Madre-Occidental
  Rana spectabilis Hillis and Frost, 1985 -- invalid -- Rana vistosa
  Rana tarahumarae Boulenger, 1917 -- invalid -- Tarahumara Frog, Rana tarahumara
  Rana tlaloci Hillis and Frost, 1985 -- invalid -- Rana de Tláloc
  Rana trilobata Mocquard, 1899 -- invalid -- Rana pierna de pollo
  Rana vaillanti Brocchi, 1877 -- invalid -- Rana de Vaillant
  Rana yavapaiensis Platz and Frost, 1984 -- invalid -- Yavapai Frog, Lowland Leopard Frog, Rana de Yavapai, Yavapai Leopard Frog
  Rana zweifeli Hillis, Frost and Webb, 1984 -- invalid -- Rana de Zweifel
  Ranidae Rafinesque, 1814 -- invalid -- Ranids, Riparian Frogs, Ranid Frogs, True Frogs
  Reptilia Laurenti, 1768 -- valid -- répteis, reptiles, Reptiles
  Rhadinaea Cope, 1863 -- valid -- Woodlands Snakes, Woodland Snakes, Littersnakes
  Rhadinaea bogertorum Myers, 1974 -- valid -- Culebra-café oaxaqueña, Oaxacan Graceful Brown Snake
  Rhadinaea cuneata Myers, 1974 -- valid -- Culebra-café veracruzana, Veracruz Graceful Brown Snake
  Rhadinaea decorata (Günther, 1858) -- valid -- Culebra-café adornada, Adorned Graceful Brown 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 lachrymans (Cope, 1870) -- invalid -- Culebra-café llorona
  Rhadinaea laureata (Günther, 1868) -- valid -- Culebra-café coronada, Crowned Graceful Brown Snake
  Rhadinaea macdougalli H. M. Smith and Langebartel, 1949 -- valid -- Culebra-café de MacDougall, MacDougall's Graceful Brown Snake
  Rhadinaea marcellae Taylor, 1949 -- valid -- Culebra-café de Marcella, Marcella's Graceful Brown Snake
  Rhadinaea montana H. M. Smith, 1944 -- valid -- Culebra-café de Nuevo León, Nuevo Leon Graceful Brown Snake
  Rhadinaea myersi Rossman, 1965 -- valid -- Culebra-café de Meyer, Myers' Graceful Brown Snake
  Rhadinaea omiltemana (Günther, 1894) -- valid -- Culebra-café guerrerense, Guerreran Pine Woods Snake
  Rhadinaea posadasi (Slevin, 1936) -- invalid -- Culebra-café de Posada
  Rhadinaea quinquelineata Cope, 1886 -- valid -- Culebra-café poblana, Pueblan Graceful Brown Snake
  Rhadinaea schistosa (H. M. Smith, 1941) -- invalid -- Culebra-café collar-incompleto
  Rhadinaea taeniata (Peters, 1863) -- valid -- Culebra-café de pino-encino, Pine-Oak Snake
  Rhadinophanes Myers and Campbell, 1981 -- valid
  Rhadinophanes monticola Myers and Campbell, 1981 -- valid -- Culebra de montaña, Graceful Mountain Snake
  Rhinocheilus Baird and Girard, 1853 -- valid -- Long-nosed Snakes
  Rhinocheilus lecontei Baird and Girard, 1853 -- valid -- Long-nosed Snake, Culebra narigona, Longnose Snake, Western Long-nosed Snake
  Rhinoclemmys Fitzinger, 1835 -- valid -- Neotropical Wood Turtles
  Rhinoclemmys areolata (Duméril and Bibron in Duméril and Duméril, 1851) -- valid -- Tortuga-de monte mojina, Furrowed Wood Turtle, Mojina
  Rhinoclemmys pulcherrima (Gray, 1856) -- valid -- Tortuga-de monte pintada, Painted Wood Turtle, Sabanera, Casco Rojo
  Rhinoclemmys rubida (Cope, 1870) -- valid -- Tortuga-de monte payaso, Mexican Spotted Wood Turtle
  Rhinophrynidae Günther, 1859 -- valid -- Burrowing Toads
  Rhinophrynus Duméril and Bibron, 1841 -- valid -- Burrowing Toads
  Rhinophrynus dorsalis Duméril and Bibron, 1841 -- valid -- Mexican Burrowing Toad, Sapo-excavador mexicano, Burrowing Toad
  Rhyacosiredon Dunn, 1928 -- invalid
  Rhyacosiredon altamirani (Dugès, 1895) -- invalid -- Siredón del Ajusco
  Rhyacosiredon leorae Taylor, 1943 -- invalid
  Rhyacosiredon rivularis Taylor, 1940 -- invalid -- Siredón de Toluca
  Rhyacosiredon zempoalaensis Taylor and Smith, 1945 -- invalid
  Rhynchocephalia -- valid -- Tuataras
  Salamandridae Goldfuss, 1820 -- valid -- Salamanders, Newts
  Salvadora Baird and Girard, 1853 -- valid -- Patch-nosed Snakes
  Salvadora bairdi Jan, 1860 -- valid -- Culebra-parchada de Baird, Baird's Patchnose Snake
  Salvadora deserticola Schmidt, 1940 -- valid -- Big Bend Patch-nosed Snake, Culebra-parchada de Big Bend, Big Bend Patchnose Snake
  Salvadora grahamiae Baird and Girard, 1853 -- valid -- Mountain Patch-nosed Snake, Culebra-parchada de montaña, Mountain Patchnose Snake, Eastern Patch-nosed Snake
  Salvadora hexalepis (Cope, 1867) -- valid -- Western Patch-nosed Snake, Culebra-parchada de cabestrillo, Western Patchnose Snake
  Salvadora intermedia Hartweg, 1940 -- valid -- Culebra-parchada oaxaqueña, Oaxacan Patchnose Snake
  Salvadora lemniscata (Cope, 1895) -- valid -- Culebra-parchada del Pacífico, Pacific Patchnose Snake
  Salvadora mexicana (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-parchada mexicana, Mexican Patchnose Snake
  Sauromalus A. H. A. Duméril, 1856 -- valid -- Chuckwallas
  Sauromalus ater A. H. A. Duméril, 1856 -- valid -- Chuckwalla norteña, Common Chuckwalla, Northern Chuckwalla
  Sauromalus australis Shaw, 1945 -- invalid -- Chuckwalla peninsular
  Sauromalus hispidus Stejneger, 1891 -- valid -- Chuckwalla espinosa, Spiny Chuckwalla
  Sauromalus obesus (Baird, 1859) -- invalid -- Chuckwalla, Chuckwalla común
  Sauromalus slevini Van Denburgh, 1922 -- valid -- Chuckwalla de Monserrat, Slevin's Chuckwalla, Monserrat Chuckwalla
  Sauromalus varius Dickerson, 1919 -- valid -- Chuckwalla de San Esteban, Piebald Chuckwalla
  Scaphiodontophis Taylor and H. M. Smith, 1943 -- valid
  Scaphiodontophis annulatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Culebra-añadida guatemalteca, Guatemala Neckband Snake
  Scaphiopus Holbrook, 1836 -- valid -- North American Spadefoots
  Scaphiopus couchii Baird, 1854 -- valid -- Couch's Spadefoot
  Scaphiopus holbrookii (Harlan, 1835) -- valid -- Eastern Spadefoot
  Sceloporus Wiegmann, 1828 -- valid -- Spiny Lizards
  Sceloporus acanthinus Bocourt, 1873 -- valid -- Lagartija-escamosa de Boucourt, Bocourt's Spiny Lizard
  Sceloporus adleri H. M. Smith and Savitzky, 1974 -- valid -- Lagartija-escamosa de Adler, Adler's Spiny Lizard
  Sceloporus aeneus Wiegmann, 1828 -- valid -- Lagartija-escamosa llanera, Southern Bunchgrass Lizard
  Sceloporus anahuacus Lara-Góngora, 1983 -- valid -- Lagartija-escamosa de Anáhuac, Anahuacan Bunchgrass Lizard
  Sceloporus angustus (Dickerson, 1919) -- valid -- Lagartija-escamosa angosta, Santa Cruz Island Sator
  Sceloporus asper Boulenger, 1897 -- valid -- Lagartija-escamosa de Boulenger, Asperous Spiny Lizard
  Sceloporus bicanthalis H. M. Smith, 1937 -- valid -- Lagartija-escamosa transvolcánica, Trans Volcanic Bunchgrass Lizard
  Sceloporus bulleri Boulenger, 1894 -- valid -- Lagartija-escamosa de Buller, Buller's Spiny Lizard
  Sceloporus carinatus H. M. Smith, 1936 -- valid -- Lagartija-escamosa aquillada, Keeled Spiny Lizard
  Sceloporus cautus H. M. Smith, 1938 -- valid -- Lagartija-escamosa tímida, Shy Spiny Lizard
  Sceloporus chrysostictus Cope, 1866 -- valid -- Lagartija-escamosa pintas amarillas, Yellow-spotted Spiny Lizard
  Sceloporus couchii Baird, 1859 -- valid -- Couch's Spiny Lizard
  Sceloporus cozumelae Jones, 1927 -- valid -- Lagartija-escamosa de Cozumel, Cozumel Spiny Lizard
  Sceloporus cryptus H. M. Smith and Lynch, 1967 -- valid -- Lagartija-escamosa de Sierra de Juárez, Sierra Juarez Spiny Lizard
  Sceloporus dugesii Bocourt, 1874 -- valid -- Duges' Spiny Lizard
  Sceloporus edwardtaylori H. M. Smith, 1936 -- valid -- Lagartija-escamosa de Taylor, Taylor's Spiny Lizard
  Sceloporus exsul Dixon, Ketchersid and Lieb, 1972 -- valid -- Lagartija-escamosa de Querétaro, Queretaran Desert Lizard
  Sceloporus formosus Wiegmann, 1834 -- valid -- Lagartija-escamosa esmeralda-norteña, Mexican Emerald Spiny Lizard
  Sceloporus gadoviae Boulenger, 1905 -- valid -- Lagartija-escamosa de Gadow, Gadow's Spiny Lizard
  Sceloporus goldmani H. M. Smith, 1937 -- valid -- Lagartija-escamosa de Goldman, Goldman's Bunchgrass Lizard
  Sceloporus graciosus Baird and Girard, 1852 -- valid -- Lagartija-escamosa de Artemisa, Sagebrush Lizard
  Sceloporus grammicus Wiegmann, 1828 -- valid -- Mesquite Lizard, Lagartija-escamosa de mezquite, Graphic Spiny Lizard
  Sceloporus grandaevus (Dickerson, 1919) -- valid -- Lagartija-escamosa anciana, Cerralvo Island Sator
  Sceloporus heterolepis Boulenger, 1894 -- valid -- Lagartija-escamosa dorso aquillado, Dorsalkeel Spiny Lizard, Southern Odd-scaled Lizard
  Sceloporus horridus Wiegmann, 1834 -- valid -- Lagartija-escamosa tarasca, Rough Lizard, Horrible Spiny Lizard
  Sceloporus hunsakeri Hall and H. M. Smith, 1979 -- valid -- Lagartija-escamosa de Hunsaker, Hunsaker's Spiny Lizard
  Sceloporus insignis Webb, 1967 -- valid -- Lagartija-escamosa collar negro, Michoacán Blackcollar Lizard, Coalcoman Black-collared Lizard
  Sceloporus internasalis H. M. Smith and Bumzahem, 1955 -- valid -- Lagartija-escamosa verde, Mail-snouted Spiny Lizard
  Sceloporus jalapae Günther, 1890 -- valid -- Lagartija-escamosa jalapeña, Jalapa Spiny Lizard
  Sceloporus licki Van Denburgh, 1895 -- valid -- Lagartija-escamosa del Cabo, Cape Arboreal Spiny Lizard
  Sceloporus lineatulus Dickerson, 1919 -- valid -- Lagartija-escamosa de Santa Catalina, Santa Catalina Spiny Lizard
  Sceloporus lundelli H. M. Smith, 1939 -- valid -- Lagartija-escamosa de Lundell, Lundell's Spiny Lizard
  Sceloporus macdougalli H. M. Smith and Bumzahem, 1953 -- valid -- Lagartija-escamosa de MacDougall, MacDougall's Spiny Lizard
  Sceloporus maculosus H. M. Smith, 1934 -- valid -- Lagartija-escamosa maculada, Spotted Spiny Lizard, Northern Snub-nosed Lizard
  Sceloporus magister Hallowell, 1854 -- valid -- Desert Spiny Lizard, Lagartija-escamosa de desierto
  Sceloporus megalepidurus H. M. Smith, 1934 -- valid -- Lagartija-escamosa escamas grandes, Largescale Spiny Lizard, Cursorial Spiny Lizard, Dull Cursorial Spiny Lizard
  Sceloporus melanorhinus Bocourt, 1876 -- valid -- Lagartija-escamosa hocico negro, Black-nosed Lizard, Pastel Tree Lizard
  Sceloporus merriami Stejneger, 1904 -- valid -- Canyon Lizard, Lagartija-escamosa de cañón
  Sceloporus mucronatus Cope, 1885 -- valid -- Lagartija-escamosa de grieta-sureña, Cleft Lizard
  Sceloporus nelsoni Cochran, 1923 -- valid -- Lagartija-escamosa de Nelson, Nelson's Spiny Lizard
  Sceloporus occidentalis Baird and Girard, 1852 -- valid -- Western Fence Lizard, Lagartija-escamosa del occidente
  Sceloporus ochoterenae H. M. Smith, 1934 -- valid -- Lagartija-escamosa de Querétaro, Queretaran Spiny Lizard, Ochoterena's Lizard
  Sceloporus olivaceus H. M. Smith, 1934 -- valid -- Texas Spiny Lizard, Lagartija-escamosa de Texas
  Sceloporus orcutti Stejneger, 1893 -- valid -- Granite Spiny Lizard, Lagartija-escamosa de granito
  Sceloporus ornatus Baird, 1859 -- valid -- Lagartija-escamosa adornada, Ornate Spiny Lizard
  Sceloporus palaciosi Lara-Góngora, 1983 -- valid -- Lagartija-escamosa de Palacios, Palacios' Bunchgrass Lizard
  Sceloporus parvus H. M. Smith, 1934 -- valid -- Lagartija-escamosa panza azul, Bluebelly Lizard
  Sceloporus pyrocephalus Cope, 1864 -- valid -- Lagartija-escamosa de pedregal, Boulder Spiny Lizard, Red-headed Spiny Lizard
  Sceloporus rufidorsum Yarrow, 1882 -- invalid -- Lagartija-escamosa de desierto-mexicano
  Sceloporus salvini Günther, 1890 -- valid -- Lagartija-escamosa de Salvin, Salvin's Spiny Lizard
  Sceloporus scalaris Wiegmann, 1828 -- valid -- Bunch Grass Lizard, Lagartija-escamosa escalonada, Light-bellied Bunch Grass Lizard
  Sceloporus serrifer Cope, 1866 -- valid -- Blue Spiny Lizard, Lagartija-escamosa azul, Rough-scaled Lizard
  Sceloporus siniferus Cope, 1871 -- valid -- Lagartija-escamosa cola larga, Longtail Spiny Lizard
  Sceloporus smaragdinus Bocourt, 1873 -- valid -- Lagartija-escamosa esmeralda-de Bocourt, Bocourt's Emerald Lizard
  Sceloporus spinosus Wiegmann, 1828 -- valid -- Lagartija-escamosa espinosa, Eastern Spiny Lizard
  Sceloporus squamosus Bocourt, 1874 -- valid -- Lagartija-escamosa de Bocourt, Mexican Spiny Lizard
  Sceloporus stejnegeri H. M. Smith, 1942 -- valid -- Lagartija-escamosa collar negro, Stejneger's Blackcollar Spiny Lizard
  Sceloporus subpictus Lynch and H. M. Smith, 1965 -- valid -- Lagartija-escamosa pintada, Southern Cursorial Lizard
  Sceloporus taeniocnemis Cope, 1885 -- valid -- Lagartija-escamosa esmeralda-de Cope, Guatemalan Emerald Spiny Lizard
  Sceloporus tanneri H. M. Smith and Larsen, 1975 -- valid -- Lagartija-escamosa de Tanner, Tanner's Spiny Lizard
  Sceloporus torquatus Wiegmann, 1828 -- valid -- Lagartija-escamosa barrada, Crevice Swift, Torquate Lizard
  Sceloporus undulatus (Bosc and Daudin in Sonnini and Latreille, 1801) -- valid -- Eastern Fence Lizard, Fence Lizard, Plateau Lizard, Prairie Lizard, Lagartija-escamosa de pradera
  Sceloporus utiformis Cope, 1864 -- valid -- Lagartija-escamosa de suelo, Cope's Largescale Spiny Lizard, Antesator
  Sceloporus variabilis Wiegmann, 1834 -- valid -- Rose-bellied Lizard, Lagartija-escamosa panza rosada, Rosebelly Lizard
  Sceloporus virgatus H. M. Smith, 1938 -- valid -- Striped Plateau Lizard, Lagartija-escamosa rayada
  Sceloporus zosteromus Cope, 1863 -- valid -- Lagartija-escamosa de San Lucas, Central Baja Spiny Lizard
  Scincella Mittleman, 1950 -- valid -- ground skinks
  Scincella gemmingeri (Cope, 1864) -- valid -- Encinela de selva, Forest Ground Skink
  Scincella lateralis (Say in James, 1822) -- valid -- Ground Skink, Encinela norteña, Little Brown Skink
  Scincella silvicola (Taylor, 1937) -- valid -- Encinela de Taylor
  Scincidae Oppel, 1811 -- valid -- Skinks
  Senticolis Dowling and Fries, 1987 -- valid -- Mountain Rat Snakes, Green Ratsnakes
  Senticolis triaspis (Cope, 1866) -- valid -- Green Rat Snake, Green Ratsnake, Culebra oliva
  Serpentes Linnaeus, 1758 -- valid -- Snakes, cobra, serpente, serpents
  Sibon Fitzinger, 1826 -- valid
  Sibon annuliferus (Boulenger, 1894) -- invalid
  Sibon dimidiatus (Günther, 1872) -- valid -- Slender Snail Sucker
  Sibon fasciatus (Günther, 1858) -- invalid
  Sibon fischeri (Boulenger, 1894) -- invalid -- Culebra-caracolera de Fisher
  Sibon nebulatus (Linnaeus, 1758) -- valid -- Slug-eating Snake, Cloudy Snail Sucker, Cloudy Snail-eating Snake
  Sibon philippii (Jan, 1863) -- invalid
  Sibon sanniolus (Cope, 1866) -- valid -- Pigmy Snail Sucker
  Sibon sartorii (Cope, 1863) -- invalid -- Culebra-caracolera terrestre
  Sibon zweifeli (Liner and Wilson, 1970) -- invalid -- Culebra-caracolera de Zweifel
  Siren Linnaeus, 1767 -- invalid -- Sirens
  Siren intermedia Barnes, 1826 -- valid -- Sirena menor, Lesser Siren
  Siren lacertina Linnaeus, 1767 -- invalid -- Sirena mayor, Greater Siren
  Sirenidae Gray, 1825 -- valid -- Sirens
  Sistrurus Garman, 1884 -- valid -- Massasaugas, Pigmy Rattlesnakes, Pygmy Rattlesnakes
  Sistrurus catenatus (Rafinesque-Schmaltz, 1818) -- valid -- Massasauga, Víbora-cascabel pigmea-norteña, Eastern Massasauga
  Sistrurus ravus (Cope, 1865) -- invalid -- Víbora-cascabel pigmea-mexicana
  Smilisca Cope, 1865 -- valid -- Smiliscas, Mexican treefrogs
  Smilisca baudinii (Duméril and Bibron, 1841) -- valid -- Mexican Smilisca, Mexican Treefrog
  Smilisca cyanosticta (Smith, 1953) -- valid -- Rana-de árbol mexicana puntos azules
  Sonora Baird and Girard, 1853 -- valid -- North American Ground Snakes, North American Groundsnakes
  Sonora aemula (Cope, 1879) -- valid -- Culebra-suelera cola plana, Filetail Ground Snake
  Sonora michoacanensis (Dugès, 1884) -- valid -- Culebra-suelera michoacana, Michoacán Ground Snake
  Sonora semiannulata Baird and Girard, 1853 -- valid -- Ground Snake, Groundsnake, Culebra-suelera semianillada, Western Groundsnake
  Spea Cope, 1866 -- valid -- Western Spadefoots
  Spea bombifrons (Cope, 1863) -- valid -- Sapo-de espuelas de las planicies, Plains Spadefoot
  Spea hammondii (Baird, 1859) -- valid -- Western Spadefoot
  Spea multiplicata (Cope, 1863) -- valid -- Mexican Spadefoot
  Sphaerodactylus Wagler, 1830 -- valid -- Dwarf Geckos
  Sphaerodactylus argus Gosse, 1850 -- valid -- Ocellated Dwarf Gecko, Ocellated Gekko, Ocellated Gecko, Geco-enano ocelado
  Sphaerodactylus glaucus Cope, 1865 -- valid -- Geco-enano collarejo
  Sphaerodactylus millepunctatus Hallowell, 1861 -- valid -- Geco-enano punteado
  Sphenomorphus Fitzinger, 1843 -- valid -- Common Skinks
  Sphenomorphus assatum (Cope, 1864) -- invalid
  Sphenomorphus cherriei (Cope, 1893) -- invalid -- Encinela-selvática café
  Sphenomorphus incertum (Stuart, 1940) -- invalid -- Encinela-selvática hojarasquera
  Spilotes Wagler, 1830 -- valid
  Spilotes pullatus (Linnaeus, 1758) -- valid -- Culebra-ratonera mica, Yellow Rat Snake, Chicken Snake, Tropical Rat Snake, Tiger Snake
  Squamata Oppel, 1811 -- valid -- Amphisbaenians, Lizards, Snakes, amphisbènes, lézards, serpents
  Staurotypidae Gray, 1869 -- invalid
  Staurotypus Wagler, 1830 -- valid -- Giant Musk Turtles
  Staurotypus salvinii Gray, 1864 -- valid -- Pacific Coast Giant Musk Turtle, Pacific Coast Musk Turtle, Crucilla
  Staurotypus triporcatus (Wiegmann, 1828) -- valid -- Tortuga-almizclera tres lomos, Mexican Giant Musk Turtle, Northern Giant Musk Turtle, Guao
  Stenorrhina A. M. C. Duméril, 1853 -- valid
  Stenorrhina degenhardtii (Berthold, 1846) -- valid -- Degenhardt's Scorpion-eating Snake
  Stenorrhina freminvillei A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid -- Culebra-alacranera de sangre, Slaty Grey Snake, Blood Snake
  Storeria Baird and Girard, 1853 -- valid -- Brown-bellied Snakes, Red-bellied Snakes, North American Brownsnakes
  Storeria dekayi (Holbrook, 1839) -- valid -- Dekay's Brown Snake, Dekay's Brownsnake, Culebra-parda de Kay, Brown Snake, couleuvre brune, Northern Brown Snake
  Storeria hidalgoensis Taylor, 1942 -- valid -- Culebra-parda hidalguense, Mexican Yellowbelly Brown Snake
  Storeria storerioides (Cope, 1865) -- valid -- Culebra-parda mexicana, Mexican Brown Snake
  Symphimus Cope, 1870 -- valid
  Symphimus leucostomus Cope, 1870 -- valid -- Culebra-labios blancos de Tehuantepec, Mexican White-lipped Snake
  Symphimus mayae (Gaige, 1936) -- valid -- Culebra-labios blancos maya, Yucatán White-lipped Snake
  Sympholis Cope, 1862 -- valid
  Sympholis lippiens Cope, 1862 -- valid -- Culebra cola corta-mexicana, Mexican Short-tail Snake
  Tantalophis Duellman, 1958 -- valid
  Tantalophis discolor (Günther, 1860) -- valid -- Culebra-ojo de gato-falsa oaxaqueña, Oaxacan Cat-eyed Snake
  Tantilla Baird and Girard, 1853 -- valid -- Black-headed Snakes, Crowned Snakes, Flat-headed Snakes
  Tantilla atriceps (Günther, 1895) -- valid -- Mexican Black-headed Snake, Culebra-encapuchada mexicana, Mexican Blackhead Snake
  Tantilla bocourti (Günther, 1895) -- valid -- Culebra-encapuchada de Bocourt, Bocourt's Black-headed Snake
  Tantilla briggsi Savitzky and H. M. Smith, 1971 -- valid -- Culebra-ciempiés de Briggs, Briggs' Centipede Snake
  Tantilla calamarina Cope, 1866 -- valid -- Culebra-ciempiés del Pacífico, Pacific Coast Centipede Snake
  Tantilla canula Cope, 1876 -- invalid -- Culebra-ciempiés imitacoral
  Tantilla cascadae Wilson and Meyer, 1981 -- valid -- Culebra-ciempiés michoacana, Michoacán Centipede Snake
  Tantilla coronadoi Hartweg, 1944 -- valid -- Culebra-ciempiés guerrerense, Guerreran Centipede Snake
  Tantilla cuniculator H. M. Smith, 1939 -- valid -- Culebra-ciempiés del Petén
  Tantilla deppei (Bocourt, 1883) -- valid -- Culebra-ciempiés de Deppe, Deppe's Centipede Snake
  Tantilla flavilineata H. M. Smith and Burger, 1950 -- valid -- Culebra-ciempiés rayas amarillas, Yellow-lined Centipede Snake
  Tantilla gracilis Baird and Girard, 1853 -- valid -- Flat-headed Snake, Culebra-ciempiés cabeza plana, Flathead Snake
  Tantilla hobartsmithi Taylor, 1936 -- valid -- Southwestern Black-headed Snake, Culebra-encapuchada del Suroeste, Southwestern Blackhead Snake, Smith's Black-headed Snake
  Tantilla jani (Günther, 1895) -- valid -- Culebra-ciempiés de Jan, Jan's Centipede Snake
  Tantilla miniata Cope, 1863 -- invalid -- Culebra-ciempiés veracruzana
  Tantilla moesta (Günther, 1863) -- valid -- Culebra-ciempiés vientre negro, Blackbelly Centipede Snake
  Tantilla morgani Hartweg, 1944 -- invalid -- Culebra-encapuchada de Morgan
  Tantilla nigriceps Kennicott, 1860 -- valid -- Plains Black-headed Snake, Culebra-encapuchada de pradera, Plains Blackhead Snake
  Tantilla oaxacae Wilson and Meyer, 1971 -- valid -- Culebra-ciempiés oaxaqueña, Oaxacan Centipede Snake
  Tantilla planiceps (Blainville, 1835) -- valid -- California Black-headed Snake, Western Black-headed Snake, Culebra-encapuchada californiana, Western Blackhead Snake
  Tantilla rubra Cope, 1875 -- valid -- Reddish Black-headed Snake, Culebra-encapuchada roja, Red Black-headed Snake
  Tantilla schistosa (Bocourt, 1883) -- valid -- Culebra-ciempiés de tierra colorada, Red Earth Centipede Snake
  Tantilla shawi Taylor, 1949 -- valid -- Culebra-ciempiés de Potosí, Potosí Centipede Snake
  Tantilla slavensi Pérez-Higareda, H. M. Smith and R. B. Smith, 1985 -- valid -- Culebra-ciempiés de Slavens, Slavens' Centipede Snake
  Tantilla striata Dunn, 1928 -- valid -- Culebra-ciempiés rayada, Striped Centipede Snake
  Tantilla taeniata (Bocourt, 1883) -- valid -- Culebra-ciempiés centroamericana, Central American Centipede Snake
  Tantilla tayrae Wilson, 1983 -- valid -- Culebra-ciempiés del Tacaná, Volcan Tacaná Centipede Snake
  Tantilla wilcoxi Stejneger, 1902 -- valid -- Chihuahuan Black-headed Snake, Culebra-encapuchada chihuahuense, Chihuahuan Blackhead Snake
  Tantilla yaquia H. M. Smith, 1942 -- valid -- Yaqui Black-headed Snake, Culebra-encapuchada yaqui, Yaquia Blackhead Snake
  Tantillita H. M. Smith, 1941 -- valid
  Tantillita brevissima (Taylor, 1937) -- valid -- Culebra-cola corta jaspeada, Speckled Dwarf Short-tail Snake
  Tantillita lintoni (H. M. Smith, 1940) -- valid -- Culebra-cola corta de Linton, Linton's Dwarf Short-tail Snake
  Teiidae Gray, 1827 -- valid -- Tegus, Ground Lizards, New World Runners, Racerunners, Whiptails, Ameivas
  Terrapene Merrem, 1820 -- valid -- Box Turtles, American Box Turtles
  Terrapene carolina (Linnaeus, 1758) -- valid -- Tortuga de Carolina, tortue tabatière, Eastern Box Turtle, Common Box Turtle, American Box Turtle
  Terrapene coahuila Schmidt and Owens, 1944 -- valid -- Aquatic Box Turtle, Tortuga de Cuatro Ciénegas, Coahuilan Box Turtle
  Terrapene nelsoni Stejneger, 1925 -- valid -- Tortuga manchada, Spotted Box Turtle, Sierra Box Turtle, Caja de Manchas, Tortuga de Mochomera
  Terrapene ornata (Agassiz, 1857) -- valid -- Tortuga adornada, Ornate Box Turtle, Western Box Turtle
  Testudines Linnaeus, 1758 -- invalid -- terrapins, tortoises, tortues, Turtles
  Testudinidae Batsch, 1788 -- valid -- Tortoises
  Thamnophis Fitzinger, 1843 -- valid -- Garter Snakes, Ribbon Snakes, North American Gartersnakes
  Thamnophis chrysocephalus (Cope, 1885) -- valid -- Culebra-listonada cabeza dorada, Goldenhead Garter Snake
  Thamnophis cyrtopsis (Kennicott, 1860) -- valid -- Black-necked Garter Snake, Culebra-listonada cuello negro, Blackneck Garter Snake, Black-necked Gartersnake
  Thamnophis digueti (Mocquard, 1899) -- invalid -- Culebra-listonada de Diguet
  Thamnophis elegans (Baird and Girard, 1853) -- valid -- Western Terrestrial Garter Snake, Culebra-listonada elegante, Terrestrial Garter Snake
  Thamnophis eques (Reuss, 1834) -- valid -- Mexican Garter Snake, Culebra-listonada del sur-mexicano, Mexican Gartersnake
  Thamnophis errans H. M. Smith, 1942 -- valid -- Culebra-listonada errante, Mexican Wandering Garter Snake
  Thamnophis exsul Rossman, 1969 -- valid -- Culebra-listonada de montaña, Montane Garter Snake
  Thamnophis fulvus (Bocourt, 1893) -- valid -- Culebra-listonada amarillenta, Highland Garter Snake
  Thamnophis godmani (Günther, 1894) -- valid -- Culebra-listonada de Godman, Godman's Garter Snake
  Thamnophis hammondii (Kennicott, 1860) -- valid -- Two-striped Garter Snake, Two-striped Gartersnake
  Thamnophis marcianus (Baird and Girard, 1853) -- valid -- Checkered Garter Snake, Culebra-listonada manchada, Checkered Gartersnake
  Thamnophis mendax Walker, 1955 -- valid -- Culebra-listonada tamaulipeca, Tamaulipan Montane Garter Snake
  Thamnophis proximus (Say in James, 1823) -- valid -- Western Ribbon Snake, Culebra-listonada occidental, Western Ribbonsnake
  Thamnophis pulchrilatus (Cope, 1885) -- valid -- Culebra-listonada de tierras altas-mexicana, Yellow-throated Garter Snake
  Thamnophis scalaris Cope, 1861 -- valid -- Culebra-listonada de montaña-cola larga, Longtail Alpine Garter Snake
  Thamnophis scaliger (Jan, 1863) -- valid -- Culebra-listonada de montaña-cola corta, Short-tail Alpine Garter Snake
  Thamnophis sirtalis (Linnaeus, 1758) -- valid -- Common Garter Snake, couleuvre rayée, Culebra-listonada común, Common Gartersnake
  Thamnophis sumichrasti (Cope, 1867) -- valid -- Culebra-listonada de Sumichrast, Sumichrast's Garter Snake
  Thamnophis valida (Kennicott, 1860) -- invalid -- Culebra-listonada de la costa-oeste
  Thecadactylus Cuvier, 1820 -- valid -- Turnip-tailed Geckos
  Thecadactylus rapicauda (Houttuyn, 1782) -- valid -- Turnip-tailed Gecko
  Thorius Cope, 1869 -- valid -- pigmy salamanders
  Thorius dubitus Taylor, 1941 -- valid -- Salamandra-pigmea de Acutzingo
  Thorius macdougalli Taylor, 1949 -- valid -- Salamandra-pigmea de MacDougall
  Thorius minutissimus Taylor, 1949 -- valid -- Salamandra-pigmea oaxaqueña
  Thorius narisovalis Taylor, 1940 -- valid -- Salamandra-pigmea de San Felipe
  Thorius pennatulus Cope, 1869 -- valid -- Salamandra-pigmea veracruzana
  Thorius pulmonaris Taylor, 1940 -- valid -- Salamandra-pigmea de cerro
  Thorius schmidti Gehlbach, 1959 -- valid -- Salamandra-pigmea de Schmidt
  Thorius troglodytes Taylor, 1941 -- valid -- Salamandra-pigmea troglodita
  Toluca Kennicott, 1859 -- invalid
  Toluca amphisticha H. M. Smith and Laufe, 1945 -- invalid -- Culebra-toluqueña manchas gemelas
  Toluca conica Taylor and H. M. Smith, 1942 -- invalid -- Culebra-toluqueña manchas grandes
  Toluca lineata Kennicott, 1859 -- invalid -- Culebra-toluqueña lineada
  Toluca megalodon Taylor and H. M. Smith, 1942 -- invalid -- Culebra-toluqueña de San Felipe
  Trachemys Agassiz, 1857 -- valid -- Sliders, slider turtles
  Trachemys scripta (Thunberg in Schoepff, 1792) -- valid -- tortue à oreilles rouges, Tortuga gravada, Pond Slider, Common Slider
  Tretanorhinus A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854 -- valid
  Tretanorhinus nigroluteus Cope, 1861 -- valid -- Culebra-buceadora vientre naranja, Orangebelly Swamp Snake
  Trimorphodon Cope, 1861 -- valid -- Lyre Snakes, Lyresnakes
  Trimorphodon biscutatus (A. M. C. Duméril, Bibron and A. H. A. Duméril, 1854) -- valid -- Western Lyre Snake, Culebra-lira cabeza negra, Costal Lyre Snake
  Trimorphodon tau Cope, 1870 -- valid -- Culebra-lira mexicana, Mexican Lyre Snake
  Trionychidae Gray, 1825 -- valid -- Softshell Turtles
  Triprion Cope, 1866 -- valid
  Triprion petasatus (Cope, 1865) -- valid -- Rana-de árbol yucateca
  Triprion spatulatus Günther, 1882 -- valid -- Rana-de árbol cabeza de pala
  Typhlopidae Merrem, 1820 -- valid -- Blind Snakes, Typical Blind Snakes, Blindsnakes
  Typhlops Oppel, 1811 -- valid -- Blind Snakes, Blindsnakes
  Typhlops microstomus Cope, 1866 -- invalid -- Serpiente-ciega yucateca
  Uma Baird, 1859 -- valid -- Fringe-toed Lizards
  Uma exsul K. P. Schmidt and Bogert, 1947 -- valid -- Lagartija-arenera proscrita, Fringe-toed Sand Lizard
  Uma notata Baird, 1859 -- valid -- Colorado Desert Fringe-toed Lizard, Lagartija-arenera del Colorado
  Uma paraphygas Williams, Chrapliwy and H. M. Smith, 1959 -- valid -- Lagartija-arenera de Chihuahua, Chihuahuan Fringe-toed Lizard
  Ungaliophis Müller, 1880 -- valid
  Ungaliophis continentalis Müller, 1880 -- valid -- Boa-enana del Istmo
  Urosaurus Hallowell, 1854 -- valid -- Tree Lizards, Brush Lizards
  Urosaurus auriculatus (Cope, 1871) -- valid -- Lagartija-arbolera de Socorro, Socorro Island Tree Lizard
  Urosaurus bicarinatus (A. H. A. Duméril, 1856) -- valid -- Lagartija-arbolera tropical, Tropical Tree Lizard
  Urosaurus clarionensis (Townsend, 1890) -- valid -- Lagartija-arbolera de Clarion, Clarion Island Tree Lizard
  Urosaurus gadovi (K. P. Schmidt, 1921) -- valid -- Lagartija-arbolera de Gadow, Gadow's Tree Lizard
  Urosaurus graciosus Hallowell, 1854 -- valid -- Long-tailed Brush Lizard, Lagartija-arbolera cola larga
  Urosaurus irregularis (Fischer, 1882) -- invalid -- Lagartija-arbolera mexicana
  Urosaurus lahtelai Rau and Loomis, 1977 -- valid -- Lagartija-arbolera de Baja California, Baja California Brush Lizard
  Urosaurus microscutatus (Van Denburgh, 1894) -- invalid -- Small-scaled Lizard, Lagartija-arbolera escamas chicas
  Urosaurus nigricaudus (Cope, 1864) -- valid -- Baja California Brush Lizard, Lagartija-arbolera cola negra, Small-scaled Lizard
  Urosaurus ornatus (Baird in Baird and Girard, 1852) -- valid -- Tree Lizard, Ornate Tree Lizard, Lagartija-arbolera común
  Uta Baird and Girard in Stansbury, 1852 -- valid -- Side-blotched Lizards
  Uta antiqua Ballinger and Tinkle, 1968 -- invalid -- Lagartija-costado manchado de San Lorenzo
  Uta concinna Dickerson, 1919 -- invalid -- Lagartija-costado manchado antigua
  Uta mannophora Dickerson, 1919 -- invalid -- Lagartija-costado manchado adornada
  Uta nolascensis Van Denburgh and Slevin, 1921 -- valid -- Lagartija-costado manchado o de Nolasco
  Uta palmeri Stejneger, 1890 -- valid -- Lagartija-costado manchado o de San Pedro, San Pedro Side-blotched Lizard
  Uta squamata Dickerson, 1919 -- valid -- Lagartija-costado manchado de Santa Catalina
  Uta stansburiana Baird and Girard, 1852 -- valid -- Side-blotched Lizard, Common Side-blotched Lizard, Lagartija-costado manchado común
  Viperidae Oppel, 1811 -- valid -- Pit Vipers, Vipers
  Xantusia Baird, 1859 -- valid -- night lizards
  Xantusia bolsonae Webb, 1970 -- valid -- Lagartija-escofina de Mapimí, Bolson Night Lizard
  Xantusia henshawi Stejneger, 1893 -- valid -- Granite Night Lizard, Henshaw's Night Lizard, Lagartija-escofina de granito
  Xantusia vigilis Baird, 1859 -- valid -- Desert Night Lizard, Lagartija-escofina de desierto
  Xantusiidae -- valid -- night lizards
  Xenodon F. Boie, 1827 -- valid
  Xenodon rabdocephalus (Wied-Neuwied, 1824) -- valid -- Culebra-engañosa norteña, False Fer-de-lance
  Xenopus Wagler, 1827 -- valid -- Clawed Frogs
  Xenopus laevis (Daudin, 1802) -- valid -- African Clawed Frog, Rana-de garras africana
  Xenosauridae -- valid -- knob-scaled lizards
  Xenosaurus Peters, 1861 -- valid
  Xenosaurus grandis (Gray, 1856) -- valid -- Xenosaurio mayor, Knob-scaled Lizard
  Xenosaurus newmanorum Taylor, 1949 -- valid -- Xenosaurio de Newman, Newman's Knob-scaled Lizard
  Xenosaurus platyceps King and Thompson, 1968 -- valid -- Xenosaurio cabeza plana, Flathead Knob-scaled Lizard
   

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