This rodent uses wetlands and flooded areas in the Chaco. Species-specific accounts report swimming and diving, and grass nests in crops or flooded grassland.
Its back is reddish to cinnamon with long black hairs; the sides are buff.
It uses swamps and flooded grassland and is reported to swim, dive, and climb. Grass nests have been found in sugarcane, banana, rice fields, and flooded grassland.
An extinction-risk assessment has not been added yet.