Mammaliaformes Rowe, 1988
[crown clade] Mammalia Linnaeus, 1758
Theriiformes Rowe, 1988, new rank
Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995, new rank
Trechnotheria McKenna, 1975
Cladotheria McKenna, 1975
Zatheria [McKenna, 1975]
Tribosphenida McKenna, 1975:27, new rank
[crown clade] Theria Parker & Haswell, 1897:448, new rank
†Asiadelphia [Trofimov & Szalay, 1993]
1 †Asiatheriidae [Trofimov & Szalay, 1994]