This cotton rat is recorded on the Pacific-facing slopes of the Sierra de Miahuatlán in Oaxaca, southern Mexico. Its species account describes moist vine-and-shrub slopes within deciduous tropical forest.
HMW describes an ochre-buff back mixed with black hairs and dark-gray underparts overlaid with dull-white hairs; the tail is dark above and pale below.
It was recorded on moist vine-and-shrub slopes in deciduous tropical forest. The account gives 1,000–2,300 m for this region.
An extinction-risk assessment has not been added yet.