as the early 2000s the state of Nevada still allowed commercial sale of Phrynosoma. Despite limited federal protection in Mexico, horned lizards are still offered in Mexican "pet" markets throughout the country. In 2014, the Center for Biological Diversity in Tucson petitioned the Oklahoma Department of Wildlife Conservation to have the Texas horned lizard put on the endangered species list due to the massive declines of its population in Oklahoma, where it was once plentiful. The center said it may later seek protection for the animal on a federal level; it also said that reptiles in general are dying off at up to 10,000 times their historic extinction rate, greatly due to human influences. Species and subspecies The following 21 species (listed alphabetically by scientific name) are recognized as being valid by the Reptile Database, three species of which have recognized subspecies: Giant horned lizard, Phrynosoma asio Baur's short-horned lizard, Phrynosoma bauri (disputed; may be conspecific with P. hernandesi) San Diego horned lizard or Blainville's horned lizard Phrynosoma blainvillii Short-tailed horned lizard, Phrynosoma braconnieri Great Plains short-horned lizard, Phrynosoma brevirostris (disputed; may be conspecific with P. hernandesi) Cedros Island horned lizard, Phrynosoma cerroense Texas horned lizard, Phrynosoma cornutum Coast horned lizard, Phrynosoma coronatum Cape horned lizard, P. c. coronatum California horned lizard, P. c. frontale Central peninsular horned lizard, P. c. jamesi San Luis Valley short-horned lizard, Phrynosoma diminutum (disputed; may be conspecific with P. hernandesi) Ditmars' horned lizard or rock horned lizard, Phrynosoma ditmarsi Pygmy short-horned lizard, Phrynosoma douglasii Sonoran horned lizard, Phrynosoma goodei Greater short-horned lizard, Phrynosoma hernandesi Flat-tail horned lizard, Phrynosoma mcallii Roundtail horned lizard, Phrynosoma modestum Mexican Plateau horned lizard or Chihuahua Desert horned lizard, Phrynosoma orbiculare P. o. bradti P. o. cortezii P. o. dugesii P. o. orbiculare P. o. orientale Desert short-horned lizard, Phrynosoma ornatissimum (disputed; may be conspecific with P. hernandesi) Desert horned lizard, Phrynosoma platyrhinos Southern desert horned lizard, P. p. calidiarum Northern desert horned lizard, P. p. platyrhinos Guerreran horned lizard, Phrynosoma sherbrookei Nieto-Montes de Oca, Arenas-Moreno, Beltrán-Sánchez, & Leaché, 2014 Regal horned lizard, Phrynosoma solare Mexican horned lizard, Phrynosoma taurus Note: In the above list, a binomial authority or trinomial authority in parentheses indicates that the species or subspecies was originally described in a genus other than Phrynosoma. Horned lizard (Phrynosoma) gallery Symbol The genus of horned lizards is the official state reptile of Wyoming. Texas designated the Texas horned