Parent taxon: Notoungulata according to L. G. Marshall and C. de Muizon 1983
See also Carroll 1988, McKenna 1975, Pascual et al. 1978, Simpson 1935, Simpson 1948 and Vucetich 1980
Sister taxa: Acoelodus, Albertogaudryidae, Allalmeia, Archaeopithecidae, Archaeoplus, Archaeotypotherium transitum, Brandmayria, Brandmayria simpsoni, Carolodarwinia, Carolodarwinia pyramidentata, Claenodon patagonicus, Degonia sympathica, Edvardocopeia, Edvardocopeia sinuosa, Entelonychia, Epitypotherium cancellatum, Eudiastatus, Hegetotheria, Henricosborniidae, Homalodotheria, Isotypotherium, Lophiodonticulus, Lophiodonticulus patagonicus, Lophiodonticulus retroversus, Notopithecidae, Notopithecus summus, Notostylopidae, Oldfieldthomasiidae, Ortholophodon, Pleurystylops, Pleurystylops glebosus, Procolpodon, Procolpodon foratus, Puelia, Puelia plicata, Pyramidon, Pyramidon klaatschi, Tonostylops, Tonostylops spissus, Toxodontia, Trimerostephanos ultimus, Typotheria, Typotheroidea, Ultrapithecus robustus
Subtaxa: Perutheriidae Satshatemnus Seudenius
Ecology: scansorial herbivore
Distribution: