Class Mammalia Linnaeus, 1758 - mammals
   Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818
     Family Didelphidae Gray, 1821 - American opossums
       Genus Monodelphis Burnett, 1830 - short-tailed opossums
         Subgenus Monodelphis Burnett, 1830
           Monodelphis emiliae (Thomas, 1912) - Emilia's short-tailed opossum