Mammalia Linnaeus, 1758 - mammals
   Theria Parker & Haswell, 1897
     Didelphimorphia Gill, 1872
       Didelphidae Gray, 1821 - American opossums
         Didelphinae Gray, 1821
           Marmosops Matschie, 1916
             Marmosops neblina Gardner, 1990 - Neblina slender opossum