This small rat occurs in western Mexico. It has been recorded in forests, scrub, and wet areas with dense vegetation, and uses underground burrows.
Its back is yellowish brown, its underside white with diffuse gray, and its yellow ears are darker at the base. The scaly hairless tail is dark above and pale below.
It is nocturnal and terrestrial and uses burrows. A survey on Cocinas Island captured it in both xeric scrub and tropical dry forest.
An extinction-risk assessment has not been added yet.