South central Arizona and along the west coast of Mexico.
This species occupies open mesquite grasslands and tropical scrub forests. It spends most of its time burrowed underground, then emerges to breed in temporary rain pools.
A round-bodied frog with a relatively small head compared to body size. The edge of its cranium at the back of its head is easily discernible, creating the appearance of a distinct neckline. It has large bulging eyes with horizontal pupils, and a bony internasal ridge. It has a rounded snout when viewed from above, and averages 5-6 cm in body length. Its dorsum is a lighter background color with distinct dark spots that sometimes converge to form elongated blotches. Its throat sac is double-lobed and lightly speckled. Its ventrum is pale and unmarked. Most individuals have a dark horizontal band behind each eye.
Learn more with Schechter Natural History's Guide to Reptiles and Amphibians