The gray-bellied akodont is a small rodent known only from Brazil's Serra do Caparaó. Records include both forest and high-elevation grassland.
The assessment reports an average head-and-body length of about 103 mm and an average tail length of about 103 mm. The back is brown to dark brown, the sides and limbs grayish, and the underside grayish yellow.
In the Serra do Caparaó, it is associated with forest and high-altitude grassland between 1,800 and 2,400 m.
An extinction-risk assessment has not been added yet.