Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Class Mammalia Linnaeus, 1758 - mammals
       Subclass Theria Parker & Haswell, 1897
         Infraclass Marsupialia Jameson, 1818 see Cohort Marsupialia Jameson, 1818
           1 Order Didelphimorphia Gill, 1872 [monotypic]
           2 Order Paucituberculata Ameghino, 1894 [monotypic]
           3 Order Microbiotheria Ameghino, 1889 [monotypic]
           4 Order Notoryctemorphia Kirsch, 1977 [monotypic]
           5 Order Dasyuromorphia Gill, 1872
           6 Order Paramelemorphia orth. inval. see Order Peramelemorphia Ameghino, 1889
           7 Order Diprotodontia Owen, 1866