roundtail horned lizard (Phrynosoma modestum)

Phrynosoma modestum is a species in the Phrynosoma genus. It is commonly known as roundtail horned lizard This name is accepted name for the species in the family Phrynosomatidae subfamily Phrynosomatinae, . This species is found in western Texas, New Mexico eastern Arizona, southeastern Colorado and eight states in northcentral Mexico.