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
                       Family Didelphidae Gray, 1821 - American opossums
                         01 Genus Marmosa Gray, 1821 - murine opossums
                         02 Genus Monodelphia (Gill, 1872) see Genus Monodelphis Burnett, 1830
                         02 Genus Monodelphis Burnett, 1830 - short-tailed opossums
                         03 Genus Caluromys Allen, 1900 - woolly opossums
                         04 Genus Didelphis Linnaeus, 1758 - large American opossums
                         05 Genus Glironia Thomas, 1912 - bushy-tailed opossums
                         06 Genus Caluromysiops Sanborn, 1951 - black-shouldered opossum
                         07 Genus Chironectes Illiger, 1811 - yapok
                         08 Genus Lestodelphis see Genus Lestodelphys Tate, 1934
                         09 Genus Lutreolina Thomas, 1910 - thick-tailed opossum
                         10 Genus Metachirus Burmeister, 1854 - brown "four-eyed" opossum
                         11 Genus Philander Brisson, 1762 - gray and black "four-eyed" opossums