Alternative spelling: Toxodonta
Parent taxon: Notoungulata according to M. B. Silva Lacerda et al. 2020
See also Ameghino 1889, Ameghino 1894, Billet 2011, Bond and López 1993, Carroll 1988, Cope 1889, Deraco and GarcÍa-López 2016, Flower and Lydekker 1891, Gadow 1898, Gregory 1910, López et al. 2010, McKenna 1956, McKenna 1975, Paula Couto 1956, Ribeiro et al. 2010, Shockey 1997, Shockey et al. 2009, Simpson 1967 and Vucetich and Bond 1982
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, Notioprogonia, Notopithecidae, Notopithecus summus, Notostylopidae, Oldfieldthomasiidae, Orthogenium ameghinoi, Ortholophodon, Pleurystylops, Pleurystylops glebosus, Procolpodon, Procolpodon foratus, Pyramidon, Pyramidon klaatschi, Tonostylops, Tonostylops spissus, Trimerostephanos ultimus, Typotheria, Typotheroidea, Ultrapithecus robustus
Subtaxa: Atryptheridae Eutoxodontia Haplodontheriidae Homalodotheriidae Isotemnidae Lithops praevius Nesotherium Noaditherium Notohippidae Pachyrucidae Periphragnis Protoxodontidae Rhadinotherium limitatum Tembotheridae Xotodontidae
Ecology: scansorial herbivore