Class Mammalia Linnaeus, 1758 - mammals
Order Marsupialia Jameson, 1818 - marsupials
see Cohort Marsupialia Jameson, 1818
Family Didelphidae Gray, 1821 - American opossums
Genus Marmosa Gray, 1821 - murine opossums
Subgenus Thylamys Gray, 1843
see Genus Thylamys Gray, 1843
Marmosa microtarsus group
see Genus Gracilinanus Gardner & Creighton, 1989
Marmosa microtarsus (Wagner, 1842)
see Gracilinanus microtarsus (Wagner, 1842)