Invalid names: Acrotherium intermedium Mercerat 1891 [synonym], Acrotherium variegatum Mercerat 1891 [synonym], Adelphotherium ligatum Ameghino 1887 [synonym], Adelphotherium lutarium Mercerat 1891 [synonym], Adelphotherium pumilum Mercerat 1891 [synonym], Adelphotherium repandum Mercerat 1891 [synonym], Adelphotherium rothi Mercerat 1891 [synonym], Adelphotherium trivium Mercerat 1891 [synonym], Gronotherium decrepitum Mercerat 1891 [synonym], Nesodon conspurcatus Ameghino 1887 [synonym], Nesodon cornutus Scott 1912 [synonym], Nesodon marmoratus Ameghino 1887 [synonym], Nesodon oweni Mercerat 1891 [synonym], Nesodon typicus Mercerat 1891 [synonym], Nesotherium argentinum Mercerat 1891 [synonym], Nesotherium nehringi Mercerat 1891 [synonym], Nesotherium rufum Mercerat 1891 [synonym], Nesotherium studeri Mercerat 1891 [synonym], Protoxodon clemens Fernández and Muñoz 2019 [synonym], Protoxodon henseli Mercerat 1891 [synonym], Protoxodon obliteratus Ameghino 1887 [synonym], Protoxodon speciosus Mercerat 1891 [synonym], Protoxodon sullivani Owen 1846 [synonym], Scophotherium cyclops Ameghino 1887 [synonym], Toxodon patagonensis Ameghino 1887 [synonym]