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Crotaphytus is a genus of lizards, commonly known as collared lizards, in the family Crotaphytidae. Member species are small to medium-sized predators indigenous to the American southwest, Baja peninsula, and Mexico. Including the tail, they can be as small as 7 in (18 cm) or as long as 14 in (36 cm), and are characterized by distinct bands of black or brown around the neck, to which their common names refer.
| Crotaphytus | |
|---|---|
 | |
| Crotaphytus collaris | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Iguania |
| Family: | Crotaphytidae |
| Genus: | Crotaphytus Holbrook, 1842 |
The following species and subspecies are recognized as being valid.[1]
| Image | Scientific name | Common name | Distribution |
|---|---|---|---|
 | Crotaphytus antiquus Axtell & Webb, 1995 | venerable collared lizard | Sierra San Lorenzo, Sierra Texas, and Sierra Solis in extreme southwestern Coahuila state, Mexico |
 | Crotaphytus bicinctores N.M. Smith & W.W. Tanner, 1972 | Great Basin collared lizard or desert collared lizard | Western United States |
 | Crotaphytus collaris (Say, 1823) | common collared lizard | Mexico and the south-central United States (Arizona, Arkansas, Colorado, Kansas, Missouri, New Mexico, Oklahoma, and Texas) |
| Crotaphytus dickersonae K.P. Schmidt, 1922 | Sonoran collared lizard | Mexico | |
| Crotaphytus grismeri McGuire, 1994 | Grismer's collared lizard | Baja California, Mexico | |
| Crotaphytus insularis Van Denburgh & Slevin, 1921 | eastern collared lizard | Mexico | |
 | Crotaphytus nebrius Axtell & Montanucci, 1977 | Sonoran collared lizard | U.S. state of Arizona and the Mexican state of Sonora |
 | Crotaphytus reticulatus Baird, 1858 | reticulated collared lizard | US state of Texas, Mexico (Coahuila, Nuevo León, and Tamaulipas) |
 | Crotaphytus vestigium N.M. Smith & W.W. Tanner, 1972 | Baja California collared lizard | California (United States) and Baja California (Mexico) |
Nota bene: A binomial authority in parentheses or a trinomial authority in parentheses indicates that the species or subspecies was originally described in a genus other than Crotaphytus.
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In 1969, Oklahoma designated its first state reptile when it chose the collared lizard.[2]
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