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
Arizona toad Arizona toad The Arizona toad ("Anaxyrus microscaphus") is a species of toad in the family Bufonidae. It is endemic to the southwestern United States, where its natural habitats are temperate lowland forests, rivers and streams, swamps, freshwater marshes, freshwater springs, ponds, open excavations, irrigated land, and seasonally flooded agricultural land. The Arizona toad was first described by the American herpetologist Edward Drinker Cope in 1867. He named it "Bufo microscaphus" and the type locality was Fort Mohave, Arizona. It was commonly known as the southwestern toad and for many years, three subspecies were recognized, "B. m. microscaphus", "B. m. californicus"