Lagostomus crassus Thomas 1910
Lagostomus crassus Thomas 1910, Ann. Mag. Nat. Hist., ser. 8, 5: 246.
Type Locality: Peru, Dist. Cuzco, Santa Ana.
Vernacular Names: Peruvian Plains Viscacha.
Distribution: Know only from the type locality.
Conservation: Extinct.
Discussion: Known only by single skull from S Peru, presumably of an animal that lived in recent times (Nowak, 1999).