Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Clade Mammalia Linnaeus 1758 [Rowe 2020]
   Metatheria Huxley 1880 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Metatheria Huxley, 1880
     Marsupialiformes Vullo, Gheerbrant, de Muizon & Néraudeau, 2009
       1 Genus †Adelodelphys Cifelli, 2004
       2.1.1 Genus †Sinbadelphys Cifelli, 2004
       2.1.2 Genus †Kokopellia Cifelli, 1993
       2.2.1 Genus †Asiatherium Trofimov & Szalay, 1994
       2.2.2.1 Genus †Anchistodelphys Cifelli, 1990
       2.2.2.2.1 Order †Archimetatheria Szalay, 1994
       2.2.2.2.2.1 [Order] †Sparassodonta Ameghino, 1894
       2.2.2.2.2.2.1 [Order] †Alphadontia Archer, 1984
       2.2.2.2.2.2.2.1.1 Genus †Turgidodon Cifelli, 1990
       2.2.2.2.2.2.2.1.2 [Order] †Polydolopimorphia Archer, 1984
       2.2.2.2.2.2.2.2.1 [Order] †Peradectia Marshall, Case & Woodburne, 1990
       2.2.2.2.2.2.2.2.2 Notometatheria Kirsch, Lapointe & Springer 1997