The Black-backed Tuco-tuco is a subterranean rodent with a dark stripe running from its nose to its rump. Confirmed specimen records are limited to two sites in Paraguay.
The back is buffy fawn, with a black stripe running from above the nose to the rump. A pale collar extends behind the cheeks.
Tuco-tucos are subterranean rodents. The original landscape at known collection sites was a Dry Chaco mosaic of thorn woodland, scrub, cacti, and grassland. The redescription does not establish this species' daily behavior or diet.
An extinction-risk assessment has not been added yet.