Mammalia Linnaeus, 1758
Alphadontidae
Apistodon
Aquiladelphidae
Borhyaenidae Ameghino, 1894
Didelphidae Gray, 1821
Hathliacynidae
Mayulestidae de Muizon, 1994
Pediomyidae Simpson, 1927
Proborhyaenidae Ameghino, 1897
Sparassocynidae
Stagodontidae Marsh, 1889
Szalinia de Muizon & Cifelli, 2001
Thylacosmilidae Riggs, 1933
