It is found in northern Mexico and the United States in southern Texas.

They have round, dark spots on the ventral surface of the tail, a characteristic which gives them both their common and scientific names.

As with all species and subspecies of earless lizard, they have no external ear openings.

When gravid, females will often turn greenish yellow on neck and trunk.

Their preferred habitat is subhumid agricultural and nonagricultural flatlands and very low rolling hills with sparse vegetation such as small patches of grass on dark clay loam soils, with a few mesquite trees mesquite, but not prickly pear cactus.