Distributional data have been gathered by C. S. Lieb, Laboratory for Environmental Biology, from a variety of resources. Unaccredited species accounts also are by Dr. Lieb.
There have been numerous changes in taxonomy in recent years, in large part due to efforts to more accurately represent phylogenetic relationships. In general, the list below follows the taxonomy as presented by the Center for North American Herpetology. The arrangement is quite different from the traditional taxonomy learned by all until very recently. For example, the Class Reptilia is subdivided into three living classes, the Chelonia (turtles), the Eusuchia (crocodilians), and the Reptilia (traditional reptiles minus the turtles and crocodilians).
Order Testudines—Turtles; Tortugas
Family Emydidae—Emydid Turtles
§ Chrysemys picta Painted Turtle; Tortuga Pintada
§ Pseudemys gorzugi Western River Cooter; Jicotea del Río Bravo
Terrapene coahuila Coahuilan Box Turtle; Tortuga de Cuartocienegas
§ Terrapene ornata Western Box Turtle; Tortuga de Adornos
§ Trachemys gaigeae Big Bend Slider; Jicotea Big Bend
§ Trachemys scripta Slider; Tortuga Pinta
Family Kinosternidae—Mud Turtles; Casquitos
§ Kinosternon flavescens Yellow Mud Turtle; Casquito Amarillo
§ Kinosternon hirtipes Mexican Mud Turtle; Casquito de Pata Rugosa
§ Kinosternon sonoriense Sonora Mud Turtle; Casquito de Sonora
Family Testudinidae—Gopher Tortoises; Tortugas del Desierto
Gopherus flavomarginatus Bolson Tortoise; Galápago de Bolsón
Family Trionychidae—Soft-shelled Turtles; Tortugas de Concha Blanda Norte Americana
§ Apalone spinifera Spiny Softshell; Tortuga de Concha Blanda
Order Squamata—Lizards and Snakes; Lacertilios y Culebras
Suborder Sauria—Lizards; Lacertilios
Family Anguidae—Anguid Lizards; Lagartijas Lagarto del Oeste
§ Elgaria kingii Madrean Alligator Lizard; Lagartija Lagarto de Montaña
Gerrhonotus infernalis Texas Alligator Lizard; Culebra Con Patas Texana
Gerrhonotus lugoi Lugo's Alligator Lizard; Lagartija Escorpión de Lugo
Family Crotaphytidae—Collared and Leopard Lizards
§ Crotaphytus collaris Eastern Collared Lizard; Cachorón
§ Gambelia wislizenii Longnose Leopard Lizard; Cachorón Leopardo de Nariz-larga
Family Gekkonidae—Geckos; Gecos
§ Coleonyx brevis Texas Banded Gecko; Cuija Texana
Coleonyx reticulatus Reticulated Gecko; Geco Reticulado
§ Coleonyx variegatus Western Banded Gecko; Cuija Manchada Occidental
§ Hemidactylus turcicus Mediterranean Gecko; Geco Pinto
Family Helodermatidae—Gila Monsters; Escorpiones
§ Heloderma suspectum Gila Monster; Escorpión del Norte
Family Phrynosomatidae—Phrynosomatid Lizards
§ Callisaurus draconoides Zebratail Lizard; Cachora
§ Cophosaurus texanus Greater Earless Lizard; Lagartijon Sordo
§ Holbrookia approximans Speckled Earless Lizard; Lagartija Sorda Manchadita
§ Holbrookia maculata Lesser Earless Lizard; Lagartija Sorda Pequeñita
§ Phrynosoma cornutum Texas Horned Lizard; Camaleón Texano
§ Phrynosoma hernandesi Mountain Short-horned Lizard; Camaleón de Cuernos-pequeños
§ Phrynosoma modestum Roundtail Horned Lizard; Tapayatxin
§ Sceloporus clarkii Clark's Spiny Lizard; Vejore de Clark
§ Sceloporus couchii Couch's Spiny Lizard; Escamoso de Rocas
Sceloporus grammicus Mesquite Lizard; Chintete de Mezquite
§ Sceloporus jarrovii Yarrow's Spiny Lizard; Lagartija Espinosa de Yarrow
§ Sceloporus magister Desert Spiny Lizard; Vejore del Desierto
§ Sceloporus maculosus Spotted Spiny Lizard; Lagartija Maculada
§ Sceloporus merriami Canyon Lizard; Lagartija de Cañón
§ Sceloporus olivaceus Texas Spiny Lizard; Lagartija Espinosa de Texas
Sceloporus ornatus Ornate Spiny Lizard; Lagartija Espinosa Adornada
Sceloporus parvus Bluebelly Lizard; Lagartija Panza-azul
§ Sceloporus poinsetti Crevice Spiny Lizard; Lagartija Espinosa de Barrada
§ Sceloporus undulatus Eastern Fence Lizard; Lagartija de Pampa
§ Urosaurus ornatus Tree Lizard; Lagartija de Árbol
§ Uma exsul Fringe-toed Sand Lizard; Lagartija de Arena
§ Uta stansburiana Side-blotched Lizard; Lagartija de Manchas Lateralis
Family Scincidae—Skinks; Linceres
§ Plestiodon obsoletus Great Plains Skink; Lincer Llanero
§ Plestiodon tetragrammus Four-lined Skink; Lincer de Cuatro Líneas
§ Scincella lateralis Ground Skink; Escíncela de Tierra
Family Teiidae—Whiptail Lizards; Lagartijas Rayadas
§ Aspidoscelis dixoni Gray-checkered Whiptail; Huico Gris
§ Aspidoscelis exsanguis Chihuahuan Spotted Whiptail; Huico Pinto de Chihuahua
§ Aspidoscelis gularis Texas Spotted Whiptail; Huico Pinto Tejano
§ Aspidoscelis inornata Little Striped Whiptail; Huico Liso
§ Aspidoscelis neomexicana New Mexico Whiptail; Huico de Nuevo México
§ Aspidoscelis scalaris Rusty-rumped Whiptail
Aspidoscelis sonorae Sonoran Spotted Whiptail; Huico Manchado de Sonora
§ Aspidoscelis tessellata Colorado Checkered Whiptail; Huico de Cuadros
§ Aspidoscelis tigris marmorata Western Marbled Whiptail
§ Aspidoscelis uniparens Desert Grassland Whiptail; Huico de la Pradera del Desierto
Family Xantusidae—Night Lizards; Lagartijas Nocturnes del Desierto
Xantusia bolsonae Bolson Night Lizard; Lagartija Nocturna del Bolsón
§ Xantusia vigilis Desert Night Lizard; Lagartija Nocturna del Desierto
Suborder Serpentes—Snakes; Culebras
Family Colubridae—Common Harmless Snakes
§ Arizona elegans Glossy Snake; Culebra Brillantes
§ Bogertophis subocularis Trans-Pecos Rat Snake; Culebra Ratonera de Trans-Pecos
§ Coluber constrictor Eastern Racer; Corredora
§ Gyalopion canum Western Hooknose Snake; Culebra de Naricilla Occidental
§ Lampropeltis alterna Gray-banded Kingsnake; Culebra Real Rayada de Gris
§ Lampropeltis getula Common Kingsnake; Culebra Real Común
§ Lampropeltis triangulum Milk Snake; Falsa Coralilla
§ Masticophis bilineatus Sonoran Whipsnake; Culebra Látigo Sonora
§ Masticophis flagellum Coachwhip; Chirrionera
§ Masticophis taeniatus Striped Whipsnake; Culebra Látigo Rayada
§ Pantherophis emoryi Great Plains Rat Snake; Serpiente ratonera de las planicies
§ Pituophis melanoleucus Gopher Snake; Cincuate
§ Rhinocheilus lecontei Long-nosed Snake; Culebra de Nariz-larga
Salvadora deserticola Big Bend Patchnose Snake; Culebra del Desierto de Big Bend
§ Salvadora grahamiae Mountain Patch-nosed Snake; Culebra Chata de Montaña
§ Scotophis bairdi Baird's Rat Snake; Ratonera de Baird
§ Sonora semiannulata Ground Snake; Culebra de Arena
Tantilla atriceps Mexican Blackhead Snake; Culebra Cabeza Negra mexicana
§ Tantilla cucullata Big Bend Blackhead Snake; Culebra Cabeza Negra de Trans-Pecos
§ Tantilla hobartsmithi Southwestern Blackhead Snake; Culebra Cabeza Negra del Suroeste
§ Tantilla nigriceps Plains Blackhead Snake; Culebra Cabeza Negra de los Llanos
§ Trimorphodon vilkinsonii Lyre Snake; Codorniz de Chihuahua
Family Crotalidae—Pitvipers; Viperas
§ Agkistrodon contortrix Copperhead; Zolcuata
§ Crotalus atrox Western Diamondback Rattlesnake; Víbora Serrana
§ Crotalus lepidus Rock Rattlesnake; Cascabel Verde
§ Crotalus molossus Blacktail Rattlesnake; Cascabel Serrana
§ Crotalus scutulatus Mojave Rattlesnake; Chiauhcoatl
§ Crotalus viridis Prairie Rattlesnake; Cascabel Occidental
§ Sistrurus catenatus Massasauga; Cascabel de Massasauga
Family Dipsadidae - Slender Rear-Fanged Snakes
§ Diadophis punctatus Ringneck Snake; Culebra de Collar
§ Hypsiglena jani Chihuahuan Nightsnake; Culebra Nocturna de Chihuahua
Family Elapidae Coral Snakes
§ Micruroides euryxanthus Western Coral Snake; Coralillo Occidental
§ Micrurus tener Texas Coral Snake; Coralillo Texana
Family Leptotyphlopidae—Blind Snakes
§ Leptotyphlops dulcis Texas Blind Snake; Culebrilla Ciega Texana
§ Leptotyphlops humilis Western Blind Snake; Culebrilla Ciega de Occidente
Family Natricidae - Harmless Live-Bearing Snakes
§ Nerodia erythrogaster Plainbelly Watersnake; Culebra de Agua de Planza Clara
Nerodia rhombifer Diamondback Watersnake; Culebra de Agua de Espalda Diamante
§ Thamnophis cyrtopsis Blackneck Garter Snake; Culebra Lineada de Bosque
§ Thamnophis eques Mexican Garter Snake; Culebra de Agua Nómada Mexicano
§ Thamnophis marcianus Checkered Garter Snake; Sochuate
Thamnophis melanogaster Blackbelly Garter Snake; Culebra de Panza Negra
§ Thamnophis proximus Western Ribbon Snake; Culebra Acuática
Thamnophis rufipunctatus Narrow-headed Garter Snake
Thamnophis sirtalis Common Garter Snake; Culebra de Agua Nómada Común
Family Xenodontidae - Robust Rear-Fanged Snakes
§ Heterodon nasicus Western Hognose Snake; Culebra Nariz de Cerdo Occidental
Last Update: 29 Mar 2011