The Dusky Arboreal Rice Rat is a nocturnal, tree-dwelling rodent of forests on the eastern side of the Andes. It has soft tawny fur and a pale underside.
Its back is covered in long, soft tawny fur, while the underside is dull white. The tail is slightly longer than head-and-body length and ends in a short tuft.
It is nocturnal and arboreal. The account records it in lower montane forest on the eastern Andean slopes at 600–2,100 m.
An extinction-risk assessment has not been added yet.