Mammalia Linnaeus 1758 [Rowe 2020]
Count: [*†*] 4o;1f;14g; †3o;5f;41g;1s
   Theria Parker & Haswell 1897 [McKenna 1975] see Subclass Theria Parker & Haswell, 1897
  Count: [*†*] 4o;1f;14g; †3o;5f;40g;1s
     Metatheria Huxley 1880 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Metatheria Huxley, 1880
    Count: [*†*] 4o;1f;14g; †3o;5f;37g;1s
       Marsupialiformes Vullo, Gheerbrant, de Muizon & Néraudeau, 2009
      Count: [*†*] 4o;1f;14g; †3o;5f;34g;1s
         †Ameridelphia Szalay 1982
        Count: [*†*] 4o;1f;14g; †3o;5f;33g;1s
           Sudameridelphia Szalay 1994
          Count: [*†*] 4o;1f;14g; †2o;5f;28g;1s
             Notometatheria Kirsch, Lapointe & Springer 1997
            Count: [*†*] 4o;1f;14g; †3f;18g;1s
               Marsupialia Jameson 1818 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Cohort Marsupialia Jameson, 1818
              Count: [*†*] 4o;1f;14g; †1f;8g
                 Australidelphia Szalay 1982 see Magnorder Australidelphia Szalay, 1982
                Count: [*] 2o;11g
                   Diprotodontia Owen, 1866
                  Count: [*] 5g
                     1.1 Genus Petaurus Shaw, 1791 - lesser gliding possums
                    Count: -
                     1.2 Genus Cercartetus Gloger, 1841 - "dormouse" possums
                    Count: -
                     2.1 Genus Macropus Shaw, 1790 - wallabies, wallaroos, and kangaroos
                    Count: -
                     2.2.1 Genus Vombatus Geoffroy Saint-Hilaire, 1803 - common wombat
                    Count: -
                     2.2.2 Genus Phascolarctos Blainville, 1816 - koala
                    Count: -