The greater earless lizard is the only species in the monotypic genus Cophosaurus. It is closely related to the smaller, lesser earless lizards and other species in the genus Holbrookia, and in fact was placed in that genus and referred to Holbrookia texana from 1852 into the 1970s. Earless lizards lack external ear openings, an adaptation to burrowing in the sand, as are the recessed lower jaw and flared upper labial scales. Greater earless lizards are sexually dimorphic, males grow larger and are more colorful than females, exhibiting pink and green colors that are particularly bright in the breeding season. Two bold black bars mark the lateral region of males but are greatly reduced and vague, or occasionally entirely absent in females.
Holbrookia is a genus of earless lizards, known commonly as the lesser earless lizards, in the family Phrynosomatidae. The genus contains six recognized species, which are found throughout the Southwestern and Central United States and northern Mexico. They are characterized by having no external ear openings, presumably to prevent soil from entering their bodies when they are digging.
Plestiodon multivirgatus, commonly known as the many-lined skink, the northern many-lined skink, or the variable skink, is a medium-sized species of lizard, a member of the North American skink genus Plestiodon in the family Scincidae. The species is native to the western United States.
Masticophis flagellum is a species of nonvenomous colubrid snake, commonly referred to as the coachwhip or the whip snake, which is endemic to the United States and Mexico. Six subspecies are recognized, including the nominotypical subspecies.
The Texas spotted whiptail is a species of long-tailed lizard, in the family Teiidae. The species is endemic to the south central and southwestern United States and northern Mexico. Six subspecies are recognized as being valid.
Holbrookia lacerata, commonly known as the spot-tailed earless lizard, is a species of phrynosomatid lizard.
Holbrookia maculata, commonly known as the lesser earless lizard, is a species of lizard in the family Phrynosomatidae. The species is native to the southwestern and central United States and northern Mexico. There are eight recognized subspecies.
Holbrookia propinqua, commonly known as the keeled earless lizard, is a species of phrynosomatid lizard.
Hypsiglena jani, commonly known as the Texas night snake or the Chihuahuan night snake, is a small species of mildly venomous snake in the subfamily Dipsadinae of the family Colubridae. The species is native to the southwestern United States and adjacent northeastern Mexico.
The Texas spiny softshell turtle is a subspecies of the spiny softshell turtle in the family Trionychidae. The subspecies is native to the southwestern United States and adjacent northeastern Mexico.
Sceloporus merriami, commonly known as the canyon lizard, is a species of lizard in the family Phrynosomatidae. The species is native to the south-western United States and northern Mexico.
Holbrookia subcaudalis, commonly known as the southern spot-tailed earless lizard, is a species of lizard in the genus Holbrookia. It was previously considered a subspecies of Holbrookia lacerata.
Coluber constrictor etheridgei, commonly known as the tan racer, is a subspecies of nonvenomous snake in the family Colubridae, a subspecies of the eastern racer. The subspecies is native to the southern United States.
Cemophora coccinea copei, commonly known as the northern scarlet snake, is a subspecies of harmless colubrid snake that is native to the southern and eastern United States.
The Texas scarlet snake is a species of nonvenomous snake in the family Colubridae. The species is endemic to the South Central United States. It was previously considered a subspecies of Cemophora coccinea.
The western hognose snake is a species of snake in the family Colubridae. The species is endemic to North America. There are three subspecies that are recognized as being valid, including the nominotypical subspecies.
The Big Bend slider, also called commonly the Mexican Plateau slider and la jicotea de la meseta mexicana in Mexican Spanish, is a species of aquatic turtle in the family Emydidae. The species is native to the Southwestern United States and northern Mexico.
Nerodia paucimaculata, commonly known as the Concho water snake, is a species of mostly aquatic, nonvenomous snake in the family Colubridae. The species is endemic to Texas in the United States.
The long-nosed leopard lizard is a species of relatively large North American lizard in the family Crotaphytidae. Gambelia wislizenii ranges in snout-to-vent length (SVL) from 8.3 to 14.6 cm. It has a large head, a long nose, and a long round tail that can be longer than its body. It is closely related to the blunt-nosed leopard lizard, which closely resembles the long-nosed leopard lizard in body proportions, but has a conspicuously blunt snout. The species G. wislizenii, once considered part of the genus Crotaphytus, is under moderate pressure because of habitat destruction but is categorized as "least concern".
The striped whipsnake is a species of nonvenomous snake in the family Colubridae. It is closely related to the California whipsnake. The striped whipsnake is native to the western United States and adjacent northern Mexico.
