Class Mammalia Linnaeus, 1758 - mammals
   Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818
     Family Didelphidae Gray, 1821 - American opossums
       01 Genus Marmosa Gray, 1821 - murine opossums
       02 Genus Monodelphis Burnett, 1830 - short-tailed opossums
       03 Genus Lestodelphys Tate, 1934 - Patagonian opossum
       04 Genus Metachirus Burmeister, 1854 - brown "four-eyed" opossum
       05 Genus Didelphis Linnaeus, 1758 - large American opossums
       06 Genus Philander Brisson, 1762 - gray and black "four-eyed" opossums
       07 Genus Lutreolina Thomas, 1910 - thick-tailed opossum
       08 Genus Chironectes Illiger, 1811 - yapok
       09 Genus Caluromys Allen, 1900 - woolly opossums
       10 Genus Caluromysiops Sanborn, 1951 - black-shouldered opossum
       11 Genus Glironia Thomas, 1912 - bushy-tailed opossums