Mexican Plateau horned lizard Mexican Plateau horned lizard The Mexican Plateau horned lizard (Phrynosoma orbiculare) is a species of horned lizard. It is also known as the Chihuahua Desert horned lizard. The specific epithet, "orbiculare", comes from the Latin adjective "orbis", meaning "circular". "Phrynosoma orbiculare" has a characteristic single row of lateral abdominal fringe scales. This "horned toad" also has two short occipital horns. "P. orbiculare" is found only in the high plateau country of central Mexico. Specifically, it is found in the states of Chihuahua, Durango, and Nuevo León. Its range continues southeast through Morelos, Puebla and Veracruz. "P. orbiculare" occurs in a
Boettger's horned toad Boettger's horned toad Boettger's horned toad, Boettger's spadefoot toad, or pale-shouldered horned toad (Xenophrys boettgeri), is a species of toad found in southern and southeastern China (the northern border runs roughly from Sichuan in the west to Shanxi in the north and Zhejiang in the east) and northeastern India (Arunachal Pradesh, Sikkim, and Assam). A closely related but probably as yet undescribed species in found in Tibet. It is not certain that the Indian specimens belong to "Xenophrys boettgeri" either. The history of this species' discovery is highly international. It was described by George Albert Boulenger, a Belgian zoologist who