The Ecuadoran Oryzomys is a small rodent with a dark brown back and white underside, recorded in humid Andean forests.
The dorsal hairs have gray bases and orange tips; ventral hairs have gray bases with white tips. It has short ears and a dark tail.
It has been collected in mature montane forest with a dense canopy, epiphytes, and an understory that includes bamboo and other herbaceous plants.
An extinction-risk assessment has not been added yet.