Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Metatheria Huxley, 1880 see Infraclass Metatheria Huxley, 1880
                 Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818
                   Family Didelphidae Gray, 1821 - American opossums
                     Genus Monodelphis Burnett, 1830 - short-tailed opossums
                       1 Monodelphis domestica (Wagner, 1842) - gray short-tailed opossum
                       2 Monodelphis americana (Müller, 1776) - northern three-striped opossum