The Common Viscacha Rat is a rodent of dry, rocky areas in western Argentina. It has a light-brown back, white underparts, and a tufted tail.
The dorsal fur is light brown, while the underparts and feet are white. Its bushy, two-toned tail has a conspicuous terminal tuft.
It is reported to be mostly nocturnal and solitary. It is herbivorous and nests in rock crevices within ravines in dry areas.
An extinction-risk assessment has not been added yet.