Full reference: G. G. Simpson. 1934. Provisional classification of extinct South American hoofed mammals. American Museum Novitates 750:1-21
Parent taxon: Notoungulata according to L. G. Marshall and C. de Muizon 1983
See also Carroll 1988, McKenna 1975, Pascual et al. 1978, Simpson 1934, Simpson 1935, Simpson 1948 and Vucetich 1980
Sister taxa: Acoelodus, Albertogaudryidae, Allalmeia, Archaeogaia, Archaeopithecidae, Archaeoplus, Archaeotypotherium transitum, Brandmayria, Carolodarwinia, Carolodarwinia pyramidentata, Claenodon patagonicus, Degonia sympathica, Edvardocopeia, Edvardocopeia sinuosa, Entelonychia, Epitypotherium cancellatum, Eudiastatus, Eurystephanodon, Hegetotheria, Henricosborniidae, Heterolophodon, Homalodotheria, Isotypotherium, Lophiodonticulus, Lophiodonticulus patagonicus, Lophiodonticulus retroversus, Notopithecidae, Notopithecus summus, Notostylopidae, Oldfieldthomasiidae, Orthogenium ameghinoi, Ortholophodon, Pleurystylops, Pleurystylops glebosus, Procolpodon, Procolpodon foratus, Pyramidon, Pyramidon klaatschi, Tonostylops, Tonostylops spissus, Toxodontia, Trimerostephanos ultimus, Typotheria, Typotheroidea, Ultrapithecus robustus
Subtaxa: Perutheriidae Satshatemnus
Ecology: scansorial herbivore
Distribution: