Mammalia Linnaeus, 1758
Acoelohyrax Ameghino, 1902
Argyrohippus Ameghino, 1902
Edvardocopeia Ameghino, 1901
Eomorphippus Ameghino, 1901
Eurygeniops Ameghino, 1896
Eurygenium Ameghino, 1895
Interhippus Ameghino, 1902
Moqueguahippus
Morphippus Ameghino, 1897
Nesohippus Ameghino, 1904
Notohippus Ameghino, 1891
Pampahippus Bond & Lopez, 1993
Perhippidion Ameghino, 1904
Pseudostylops Ameghino, 1901
Rhynchippus Ameghino, 1897
Stilhippus Ameghino, 1904
Trimerostephanos Ameghino, 1895
