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 Maquiamys Microscleromys Neoepiblemidae Niedemys Saremmys Ucayalimys
Ecology: ground dwelling herbivore
Distribution:
• Quaternary of Brazil (2 collections), the Dominican Republic (1), Jamaica (3), Peru (1), Puerto Rico (1), Saint Barthélemy (1)
• Pliocene to Pleistocene of Uruguay (2)
• Pliocene of Argentina (6), Peru (1), Uruguay (1), Venezuela (1)
• Huayquerian of Argentina (15), Bolivia (1), Venezuela (3)
• Miocene to Pliocene of Brazil (1), Colombia (1)
• Miocene of Argentina (53), Brazil (14), Chile (3), Colombia (32), Peru (16), Uruguay (2), Venezuela (20)
• Deseadan of Argentina (1)
• Oligocene of Argentina (1), Peru (6), Puerto Rico (2)
Total: 191 collections including 405 occurrences