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 noctivaga group see Genus Marmosops Matschie, 1916
             01 Marmosa noctivaga Tschudi, 1845 see Marmosops noctivagus (Tschudi, 1844)
             02 Marmosa yungasensis Tate, 1931 see Marmosops dorothea (Thomas, 1911)
             03 Marmosa leucastra Thomas, 1927 see Marmosops noctivagus (Tschudi, 1844)
             04 Marmosa ocellata Tate, 1931 see Marmosops impavidus (Tschudi, 1845)
             05 Marmosa incana (Lund, 1841[1840]) see Marmosops incanus (Lund, 1840)
             06 Marmosa scapulata Burmeister, 1856 see Marmosops incanus (Lund, 1840)
             07 Marmosa invicta Goldman, 1912 - Panama mouse-opossum see Marmosops invictus (Goldman, 1912)
             08 Marmosa parvidens (Tate, 1931) see Marmosops parvidens (Tate, 1931)
             09 Marmosa handleyi Pine, 1981 see Marmosops handleyi (Pine, 1981)
             10 Marmosa fuscata Thomas, 1896 see Marmosops fuscatus (Thomas, 1896)
             11 Marmosa cracens (Handley & Gordon, in Eisenberg, ed., 1979) see Marmosops cracens (Handley & Gordon, 1979)
             12 Marmosa impavida Tschudi, 1845 - pale mouse-opossum see Marmosops impavidus (Tschudi, 1845)
             13 Marmosa lepida (Thomas, 1888) - rufous mouse opossum