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
Placentalia Owen, 1837:903, new rank
Epitheria McKenna, 1975, new rank
Preptotheria [McKenna, 1975]
Anagalida [Szalay & McKenna, 1971]
Simplicidentata Weber, 1904, new rank
Rodentia [Bowdich, 1821]
Myomorpha [Brandt, 1855]
Geomorpha Thaler, 1966, new rank
Geomyoidea [Bonaparte, 1845]
Geomyidae [Bonaparte, 1845]
Heteromyinae [Gray, 1868]
Perognathini Coues, 1875, new rank
†Oregonomys [Martin, 1984]