Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
   Metatheria Huxley 1880 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Metatheria Huxley, 1880
     Marsupialiformes Vullo, Gheerbrant, de Muizon & Néraudeau, 2009
       Notometatheria Kirsch, Lapointe & Springer 1997
         Marsupialia Jameson 1818 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Cohort Marsupialia Jameson, 1818
           Australidelphia Szalay 1982 see Magnorder Australidelphia Szalay, 1982
             1.1 [Order] Dasyuromorpha see Order Dasyuromorphia Gill, 1872
             1.2 [Order] Peramelemorphia Ameghino, 1889
             2.1 [Order] Microbiotheria Ameghino, 1889
             2.2 [Order] Diprotodontia Owen, 1866