Clyomys laticeps (Thomas, 1909), the broad-headed spiny rat, is a medium-sized semifossorial rodent with spinous pelage, reduced tail, short limbs, and long powerful claws. These characteristics and its very conspicuous tympanic bullae make C. laticeps unique among echimyid rodents. It primarily inhabits the Cerrado domain of central and southwestern Brazil, where it occurs in open grasslands and savannas, and also in the Paraguayan Chaco. Presently, C. laticeps is listed as “Least Concern” by the International Union for Conservation of Nature and Natural Resources, although some populations inhabit localities under strong habitat change due to urbanization and conversion of Cerrado vegetation to pastures.