Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Didelphimorphia Gill, 1872
       Family Didelphidae Gray, 1821 - American opossums
         Subfamily Didelphinae Gray, 1821
           Genus Marmosa Gray, 1821 - murine opossums
             1 Marmosa andersoni Pine, 1972 - heavy-browed mouse opossum
             2 Marmosa lepida (Thomas, 1888) - rufous mouse opossum
             3 Marmosa mexicana Merriam, 1897 - Mexican mouse opossum
             4 Marmosa murina (Linnaeus, 1758) - Linnaeus's mouse opossum
             5 Marmosa quichua Thomas, 1899 - Quechuan mouse opossum
             6 Marmosa robinsoni Bangs, 1898 - Robinson's mouse opossum
             7 Marmosa rubra Tate, 1931 - red mouse opossum
             8 Marmosa tyleriana Tate, 1931 - Tyleria mouse opossum
             9 Marmosa xerophila Handley & Gordon, 1979 - Guajira mouse opossum