The robust tuco-tuco lives in highland grassland in Tucumán Province, northwestern Argentina. It digs underground tunnels and feeds mainly on grasses.
It has a stout, cylindrical body and a short, thick tail. Its eyes and ears are small, and its forefeet have strong claws.
It lives in underground tunnels and is active around dawn and dusk. Grasses make up most of its diet.
An extinction-risk assessment has not been added yet.