Alligator Lizard refer to lizards of the genus Elgaria, Gerrhonotus, and Abronia that are commonly referred to as alligator lizards, due to a vague resemblance to the alligator. Elgaria and Gerrhonotus are a closely related genus of anguid lizards found in the Pacific Coast and Southwestern United States, into Northern and Central Mexico. Abronia, also known as Arboreal Alligator Lizards, belongs to the family of Anguidae and are found in Central to northeastern South America.
The glass lizards, genus Ophisaurus, are a group of reptiles that resemble snakes, but are actually lizards. Although most species have no legs, their head shape and the fact that they have movable eyelids and external ear openings identify them as lizards. A few species have very small stub-like legs near the rear vent.