Class Mammalia Linnaeus, 1758 - mammals
   Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818
     Family Didelphidae Gray, 1821 - American opossums
       Genus Didelphis Linnaeus, 1758 - large American opossums
         1 Didelphis albiventris Lund, 1840 - white-eared opossum
         2 Didelphis marsupialis Linnaeus, 1758 - common opossum
         3 Didelphis virginiana Kerr, 1792 - Virginia opossum