Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
         Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975
           Legion Cladotheria McKenna, 1975 see Clade Cladotheria McKenna 1975
             Sublegion Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
               Infralegion Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
                 [crown] Supercohort Theria Parker & Haswell, 1897 - therians see Subclass Theria Parker & Haswell, 1897
                   Cohort Marsupialia Jameson, 1818 - marsupials
                     Magnorder Ameridelphia Szalay, 1982 see Clade Ameridelphia Szalay 1982
                       Order Didelphimorphia Gill, 1872
                         Family Didelphidae Gray, 1821 - American opossums
                           Subfamily Didelphinae Gray, 1821
                             01 Genus †Pucadelphys Marshall & de Muizon, 1988
                             02 Genus †Incadelphys Marshall & de Muizon, 1988
                             03 Genus †Mizquedelphys Marshall & de Muizon, 1988
                             04 Genus †Andinodelphys Marshall & de Muizon, 1988
                             05 Genus †Marmosopsis Paula Couto, 1962
                             06 Genus †Itaboraidelphys Marshall & de Muizon, 1984
                             07 Genus †Coona Simpson, 1938
                             08 Tribe Monodelphini Talice, de Mosera & Machado, 1960
                             09 Tribe Metachirini Reig, Kirsch & Marshall, 1985
                             10 Tribe Didelphini Gray, 1821