Crocodilians
| Picture | Scientific name | Common name | Family | Conservation status |
|---|---|---|---|---|
| Family: Alligatoridae (alligators and caimans) | ||||
 | Alligator mississippiensis | American alligator | Alligatoridae | IUCN (LC) |
This list of reptiles of Texas includes the snakes, lizards, crocodilians, and turtles native to the U.S. state of Texas.
Texas has a large range of habitats, from swamps, coastal marshes and pine forests in the east, rocky hills and limestone karst in the center, desert in the south and west, mountains in the far west, and grassland prairie in the north. This vast contrast in biomes makes Texas home to an extremely wide variety of herpetofauna. Its central position in the United States means that species found primarily in either the western or eastern parts of the country often have their ranges meeting in the state. Its proximity to Mexico is such that many species found there and into Central America range as far north as Texas. The abundance of reptiles makes the state a prime area for research, and most species found in Texas have been well studied.
Texas state law protects several reptile species; threatened species are denoted with a (T) and endangered species are denoted with an (E). The climate of Texas has also led to some species being introduced and establishing a permanent population, denoted with an (I).
| Least-concern species | |
| Vulnerable species | |
| Endangered species | |
| Critically endangered | |
| Invasive species |
| Picture | Scientific name | Common name | Family | Conservation status |
|---|---|---|---|---|
| Family: Alligatoridae (alligators and caimans) | ||||
| | Alligator mississippiensis | American alligator | Alligatoridae | IUCN (LC) |
Reptiles, as most commonly defined, are the animals in the class Reptilia, a paraphyletic grouping comprising all sauropsid amniotes except Aves (birds). Living reptiles comprise turtles, crocodilians, squamates and rhynchocephalians (tuatara). In the traditional Linnaean classification system, birds are considered a separate class to reptiles. However, crocodilians are more closely related to birds than they are to other living reptiles, and so modern cladistic classification systems include birds within Reptilia, redefining the term as a clade. Other cladistic definitions abandon the term reptile altogether in favor of the clade Sauropsida, which refers to all animals more closely related to modern reptiles than to mammals. The study of the traditional reptile orders, historically combined with that of modern amphibians, is called herpetology.
Herpetology is the branch of zoology concerned with the study of amphibians and reptiles. Birds, which are cladistically included within Reptilia, are traditionally excluded here; the scientific study of birds is the subject of ornithology.
The eastern copperhead, also known as the copperhead, is a species of venomous snake, a pit viper, endemic to eastern North America; it is a member of the subfamily Crotalinae in the family Viperidae.
The Piney Woods is a temperate coniferous forest terrestrial ecoregion in the Southern United States covering 54,400 square miles (141,000 km2) of East Texas, southern Arkansas, western Louisiana, and southeastern Oklahoma. These coniferous forests are dominated by several species of pine as well as hardwoods including hickory and oak. Historically the most dense part of this forest region was the Big Thicket though the lumber industry dramatically reduced the forest concentration in this area and throughout the Piney Woods during the 19th and 20th centuries. The World Wide Fund for Nature considers the Piney Woods to be one of the critically endangered ecoregions of the United States. The United States Environmental Protection Agency (EPA) defines most of this ecoregion as the South Central Plains.
The chicken turtle is an uncommon freshwater turtle found in the southeastern United States. It is in the monotypic genus Deirochelys.
Pseudemys is a genus of large, herbivorous, freshwater turtles of the eastern United States and adjacent northeast Mexico. They are often referred to as cooters, which stems from kuta, the word for turtle in the Bambara and Malinké languages, brought to America by enslaved people from Africa.
James Ray Dixon was professor emeritus and curator emeritus of amphibians and reptiles at the Texas Cooperative Wildlife Collection at Texas A&M University. He lived in El Campo, Texas throughout most of his childhood. He published prolifically on the subject of herpetology in his distinguished career, authoring and co-authoring several books, book chapters, and numerous peer reviewed notes and articles, describing two new genera, and many new species, earning him a reputation as one of the most prominent herpetologists of his generation. His main research focus was morphology based systematics of amphibians and reptiles worldwide with emphasis on Texas, US, Mexico, Central America, and South America, although bibliographies, conservation, ecology, life history and zoogeography have all been the subjects of his extensive publications.
Drymarchon melanurus erebennus, commonly known as the Texas Indigo Snake, is a subspecies of large, nonvenomous snake in the family Colubridae. The subspecies is native to Texas and adjacent Mexico.
Graptemys is a genus of freshwater turtles containing 14 species, commonly known as map turtles. Graptemys are small to medium-sized turtles that are sexually dimorphic, with females attaining as much as twice the length and ten times the mass as males in some species. Depending on the species, adult males range from 7–16 cm (2.75–6.25 in), adult females 10–29.5 cm (4–11.62 in), and hatchlings 2.5–3.8 cm (1–1.5 in), although some sources indicate female Barbour's map turtles grow to 33 cm (13 in) in length. Most species have a distinctive dark pigmented keel that is often notched or serrated running down the center of the carapace and serrated scutes on the rear margin. The head, neck, and limbs exhibit bold patterns of yellow lines and spots against darker green, olive, or black base colors. The patterns on the head can be important characters in identifying the various species. The common name "map turtle" is derived from the intricate patterns on their shells that are suggestive of topographical maps, although the patterns are more apparent in some species than others, and often become obscure in older specimens. Some species are occasionally called "sawbacks", in reference to the serrated keels on their shell.
Hobart Muir Smith, born Frederick William Stouffer, was an American herpetologist. He is credited with describing more than 100 new species of American reptiles and amphibians. In addition, he has been honored by having at least six species named after him, including the southwestern blackhead snake, Smith's earth snake, Smith's arboreal alligator lizard, Hobart's anadia, Hobart Smith's anole, and Smith's rose-bellied lizard. At 100 years of age, Smith continued to be an active and productive herpetologist. Having published more than 1,600 manuscripts, he surpassed all contemporaries and remains the most published herpetologist of all time.
Haldea striatula, commonly called the rough earth snake, is a species of nonvenomous natricine colubrid snake native to the Southeastern United States.
Drymobius margaritiferus, commonly known as the speckled racer, is a species of nonvenomous colubrid snake native to the Americas. The specific name, margaritiferus, means "pearl-bearing" in Latin, referring to the pearl-like spots on the dorsal scales.
The Rio Grande cooter is a species of turtle in the family Emydidae. The species is native to northeastern Mexico and the adjacent southwestern United States.
J. Whitfield "Whit" Gibbons is an American herpetologist, author, and educator. He is Professor Emeritus of Ecology, University of Georgia, and former Head of the Environmental Outreach and Education program at the Savannah River Ecology Laboratory (SREL).
The southern painted turtle is a species of turtle in the family Emydidae. It is endemic to the south-central United States.
Lee Fitzgerald is Professor of Zoology and Faculty Curator of Amphibians and Reptiles in the Department of Wildlife and Fisheries Sciences at Texas A&M University. His biological specialty is the evolutionary ecology and conservation biology of amphibians and reptiles (herpetology). Fitzgerald is a former editor of Herpetological Monographs.
Walter E. Meshaka Jr. is an American herpetologist and natural historian. He was the supervisory curator for the four National Parks in southern Florida from 1995 to 2000. In 2000 he became the Senior Curator of Zoology and Botany at the State Museum of Pennsylvania in Harrisburg, Pennsylvania. His research has been covered by Lawrence Journal-World, among other news outlets.
