Clade Caviomorpha Wood and Patterson 1955 (caviomorph)
Parent taxon: Hystricognathi according to P. Coster et al. 2010
See also Carroll 1988, Huchon and Douzery 2001, Kramarz 2001, MacFadden et al. 1993, Mones and Ojasti 1986, Nowak 1999, Patterson and Wood 1982, Turvey et al. 2015, Vucetich et al. 2015, Vucetich and Verzi 1996 and Wood 1958
Sister taxa: Bathyergomorpha, Bugtimys, Diatomyidae, Gaudeamuridae, Hodsahibia, Hystricidae, Phiomorpha, Protophiomyinae, Tufamyidae
Subtaxa: Aenigmys Balsayacuy Cachiyacuy Canaanimys Cavioidea Cephalomyidae Chachapoyamys Chambiramys Chinchillidae Chinchilloidea Erethizontoidea Luribayomys Luribayomys masticator Octodontoidea Palmiramys Palmiramys waltheri Pozomys Tacheria Tarapotomys Vucetichimys Zetamyidae