Known only from the type locality in Chiapas (extreme southern Mexico). Classified as Critically Endangered (CR B1ab(iii,v)) on the Red List of Threatened Species.

Known from a single locality and expected to decline.

There do not appear to be any conservation measures in place for this species.

Virtually nothing is known about the ecology of this species. Climbing rats superficially resemble large specimens of the black rat (Rattus rattus). They usually have greyish or brownish upper parts and whitish underparts. The feet are brown or russet and the toes are white or brown. The tail is dark brown to blackish. The tail is slender and scantily haired and the ears are large and naked. The feet are broad and short, and the hind feet appear to be suited to an arboreal life. Preferred habitats for climbing rats are heavily forested areas, often around rocky ledges. Specimens have been collected both up in the trees and on the ground.