Mammalia Linnaeus 1758 [Rowe 2020] see Class Mammalia Linnaeus, 1758
   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
             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
                   Diprotodontia Owen, 1866
                     1.1 Genus Petaurus Shaw, 1791 - lesser gliding possums
                     1.2 Genus Cercartetus Gloger, 1841 - "dormouse" possums
                     2.1 Genus Macropus Shaw, 1790 - wallabies, wallaroos, and kangaroos
                     2.2.1 Genus Vombatus Geoffroy Saint-Hilaire, 1803 - common wombat
                     2.2.2 Genus Phascolarctos Blainville, 1816 - koala