Mammalia Linnaeus, 1758
Allalmeia Rusconi, 1946
Anchistrum Ameghino, 1901
Archaeotypotherium Roth, 1903
Brachystephanus Simpson, Minoprio & Patterson, 1962
Brandmayria Cabrera, 1936
Carolodarwinia Ameghino, 1901
Colhuapia Roth, 1901
Colhuelia Roth, 1901
Epitypotherium Ameghino, 1904
Hermoseodon Mercerat, 1917
Isotypotherium Ameghino, 1904
Kibenikhoria Simpson, 1935
Lafkenia Roth, 1901
Lophiodonticulus Ameghino, 1902
Loxocoelus Ameghino, 1895
Orthogeniops Ameghino, 1902
Ortholophodon Roth, 1901
Phanotherus Ameghino, 1889
Pleurystylops Ameghino, 1901
Procolpodon Ameghino, 1904
Pyralophodon Ameghino, 1904
Pyramidon Roth, 1901
Senodon Ameghino, 1895
Tonostylops Ameghino, 1902
Xenostephanus Simpson, Minoprio & Patterson, 1962
