Mammalia Linnaeus, 1758
Adinotherium Ameghino, 1887
Alitoxodon Rovereto, 1914
Eutomodus Ameghino, 1889
Eutrigonodon Ameghino, 1891
Hemixotodon Cabrera & Kraglievich, 1931
Hyperoxotodon Mercerat, 1895
Mixotoxodon van Frank, 1957
Nesodon Owen, 1847
Nesodonopsis Roth, 1898
Ocnerotherium Pascual, 1954
Oriadubitherium
Palaeotoxodon Ameghino, 1904
Palyeidodon Roth, 1898
Paratrigodon Cabrera & Kraglievich, 1931
Pisanodon
Polyeidodon Palmer, 1904
Posnanskytherium Lazarte, 1943
Proadinotherium Ameghino, 1895
Stenostephanos Trouessart, 1898
Stenotephanos Ameghino, 1886
Stereotoxodon Ameghino, 1904
Toxodon Owen, 1837
Xotodon Ameghino, 1887
