Mammalia Linnaeus 1758 [Rowe 2020]
Theria Parker & Haswell 1897 [McKenna 1975]
see Subclass Theria Parker & Haswell, 1897
Metatheria Huxley 1880 [O'Leary, Allard, Novacek, Meng & Gatesy 2004]
see Infraclass Metatheria Huxley, 1880
Marsupialiformes Vullo, Gheerbrant, de Muizon & Néraudeau, 2009
†Ameridelphia Szalay 1982
Sudameridelphia Szalay 1994
†Pucadelphyda de Muizon, Ladevèze, Selva, Vignaud & Goussard, 2018
†Polydolopimorphia Archer, 1984
1 Genus †Epidolops Paula Couto, 1952
2 Genus †Gashternia Simpson, 1935