Synonyms: Acrotherium intermedium; Acrotherium variegatum; Adelphotherium ligatum; Adelphotherium lutarium; Adelphotherium pumilum; Adelphotherium repandum; Adelphotherium rothi; Adelphotherium trivium; Gronotherium decrepitum; Nesodon obliteratus; Nesodon oweni; Nesodon sulivani; Nesodon typicus; Nesotherium argentinum; Nesotherium nehringi; Nesotherium rufum; Nesotherium studeri; Protoxodon clemens; Protoxodon henseli; Protoxodon obliteratus; Protoxodon patagonensis; Protoxodon speciosus; Protoxodon sullivani; Scophotherium cyclops; Toxodon patagonensis