living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Theria Parker & Haswell, 1897
                 Infraclass Metatheria Huxley, 1880
                   Superorder Marsupialia Jameson, 1818 see Cohort Marsupialia Jameson, 1818
                     Order Marsupicarnivora Ride, 1964 see Order Polyprotodonta
                       1 Family Didelphidae Gray, 1821 - American opossums
                       2 Family Microbiotheriidae Ameghino, 1887
                       3 Family Thylacinidae Bonaparte, 1838
                       4 Family Dasyuridae Goldfuss, 1820 - marsupial "mice" and "cats", and Tasmanian devil
                       5 Family Myrmecobiidae Waterhouse, 1841
                       6 Family Notoryctidae Ogilby, 1892