This small mouse is known from two localities in southern Misiones Province, northeastern Argentina. It occurs in natural and modified grasslands along forest edges.
The dorsal fur is soft and moderately long, with dark gray hair bases. The underside is grayish cream, without a sharp boundary from the back. Short whitish hairs cover the upper surfaces of the feet.
It inhabits natural or modified forest-edge grasslands in the Atlantic Forest ecoregion. The treatment describes it as terrestrial and nocturnal.
An extinction-risk assessment has not been added yet.