This large rodent has tawny and dark-brown upperparts. HMW (2017) gives one distribution locality in northeastern Chaco, Argentina, in a Chacoan environment near freshwater.
HMW (2017) describes a large individual with a head-and-body length of 225 mm and a tail length of 110 mm. The upperparts mix tawny and dark brown; the underside is white to pale gray. The tail is short relative to the body.
HMW (2017) records a Chacoan environment near freshwater at one locality in northeastern Argentina. It gives no diet or breeding record.
An extinction-risk assessment has not been added yet.