This small mouse occurs in the mountains of Oaxaca in southern Mexico. Its back is dark gray and its underside is grayish white.
The dorsal fur is dark grey and the underside greyish white.
It inhabits cloud forests at 2,500–3,000 m and is nocturnal, using both the ground and trees.
The ears are dark and thin.
The tail is bicoloured and sparsely haired.
An extinction-risk assessment has not been added yet.