1) Plains lizard 2) Small spined lizard 
(genus Phrynosoma), any of about 14 species of lizards belonging to the family Iguanidae that are usually characterized by daggerlike head spines, or ... [1 related articles]
Horned-toad is a popular name for the Phrynosoma genus of lizards. They are found in America and look rather like toads and are covered with spine-like scales.