This rodent is recorded on the eastern Andean slopes of northern Ecuador and southern Colombia. The type specimen was trapped in a forested mountain stream in Ecuador.
The fur is dull grayish black, with the underside often somewhat lighter. The whiskers and lip margins are usually silver, and the underside of the tail has whitish hairs. Some individuals have a white tail tip or a white chest blaze.
The type specimen, one adult lactating female, was trapped in a forested mountain stream in Ecuador near a small waterfall.
An extinction-risk assessment has not been added yet.