A mouse with dark olive-grey fur on its back, it inhabits humid mountain forests in northwestern Argentina and uses grass and streamside scrub at higher sites.
The fur on its back is dark olive-gray, giving the upper surface a muted dark tone.
It is recorded in humid Yungas montane forest; at higher sites it also uses tall grass and scrub beside streams.
There are whitish patches of hair on the chin, and hairs in the groin are white to their bases.
The muzzle is elongated.
An extinction-risk assessment has not been added yet.