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
           1.1 Genus †Turgidodon Cifelli, 1990
           1.2.1 Genus †Pediomys Marsh, 1889
           1.2.2.1 Genus †Eodelphis Matthew, 1916
           1.2.2.2 Genus †Didelphodon Marsh, 1889
           2.1 †Peradectia Marshall, Case & Woodburne, 1990
           2.2 Sudameridelphia Szalay 1994