Mammalia Linnaeus, 1758 - mammals
   Theria Parker & Haswell, 1897
     Didelphimorphia Gill, 1872
       Didelphidae Gray, 1821 - American opossums
         Didelphinae Gray, 1821
           Marmosops Matschie, 1916
             Marmosops fuscatus (Thomas, 1896) - dusky slender opossum
               1 [Marmosops fuscatus fuscatus] (Thomas, 1896)
               2 Marmosops fuscatus carri (Allen & Chapman, 1897)
               3 Marmosops fuscatus perfuscus (Thomas, 1924)