Its back is dark brown, its belly pale, and its long tail ends in a tuft. This rare rodent is recorded in mid- to high-elevation forests of the eastern Bolivian Andes, but natural-history records remain limited.
The back is dark brown and the underside pale grayish white. A dusky band may cross the chest, and the long tail ends in a distinct tuft.
It occurs in mid- to high-elevation forests. Genetic work found three lineages, but comparisons of their appearance and ecology are lacking, so they have not been treated as separate species or subspecies.
An extinction-risk assessment has not been added yet.