The Magellanic tuco-tuco is a burrowing rodent known from southern Patagonia and Tierra del Fuego. Historical accounts describe it digging underground burrows and eating grass.
An early description cited in the review calls it brownish-cinnamon, paler underneath, with a short tail and medium-sized ears.
A 1835 observation quoted in the review says it burrows underground for shelter and feeds on grass.
An extinction-risk assessment has not been added yet.