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 Marmosa Gray, 1821
           Marmosa cinerea group see Genus Micoureus Lesson, 1842
             1 Marmosa cinerea (Temminck, 1824) see Micoureus demerarae (Thomas, 1905)
             2 Marmosa alstoni J.A. Allen, 1900 see Micoureus alstoni (Allen, 1900)
             3 Marmosa domina Thomas, 1920 see Micoureus demerarae (Thomas, 1905)
             4 Marmosa constantiae Thomas, 1903[1904] see Micoureus constantiae (Thomas, 1904)
             5 Marmosa mapiriensis Tate, 1931 see Micoureus regina (Thomas, 1898)
             6 Marmosa rapposa Thomas, 1899 see Micoureus regina (Thomas, 1898)
             7 Marmosa germana Thomas, 1904 see Micoureus regina (Thomas, 1898)
             8 Marmosa regina Thomas, 1898 see Micoureus regina (Thomas, 1898)
             9 Marmosa phaea Thomas, 1899 see Micoureus regina (Thomas, 1898)