Parent taxon: Caviomorpha according to D. Huchon and E. J. P. Douzery 2001
See also Bertrand et al. 2012, Carroll 1988, Nowak 1999, Vucetich 1989, Vucetich et al. 2015, Vucetich et al. 2010, Wood 1958 and Wood and Patterson 1959
Sister taxa: Aenigmys, Balsayacuy, Cachiyacuy, Canaanimys, Cavioidea, Cephalomyidae, Chachapoyamys, Chambiramys, Chinchillidae, Erethizontoidea, Luribayomys, Luribayomys masticator, Octodontoidea, Palmiramys, Palmiramys waltheri, Pozomys, Tacheria, Tarapotomys, Vucetichimys, Zetamyidae
Subtaxa: Borikenomys Dinomyidae Garridomys Heptaxodontidae Loncolicu Neoepiblemidae Niedemys Saremmys Ucayalimys
Ecology: ground dwelling herbivore
Distribution:
• Quaternary of Brazil (2 collections), Peru (1)
• Pliocene to Pleistocene of Uruguay (2)
• Pliocene of Argentina (6), Brazil (1), Peru (1), Uruguay (1), Venezuela (1)
• Huayquerian of Argentina (15), Bolivia (1), Venezuela (3)
• Miocene to Pliocene of Colombia (1)
• Miocene of Argentina (53), Brazil (15), Chile (3), Colombia (26), Peru (16), Uruguay (2), Venezuela (20)
• Deseadan of Argentina (1), Bolivia (3)
• Oligocene of Argentina (1), Peru (6), Puerto Rico (1)
Total: 182 collections including 389 occurrences