This rodent has sparsely haired soles and a mostly uniform-colored tail. It occurs in grasslands of Argentina, Uruguay, and nearby areas; Argentine records describe it as nocturnal.
Its soles are sparsely haired and its tail is mostly unicolored. The species account gives these traits as differences from the related R. auritus.
Argentine records describe it as nocturnal and solitary, living on the ground but also partly fossorial. It has been observed in grassland, shrubland, and open corn stubble.
An extinction-risk assessment has not been added yet.