Class Mammalia Linnaeus, 1758 - mammals
Count: 21o19f27g86s1ss; †2f2g2s
   Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818
  Count: [s] 15f;74g;269s;10ss; ‡1f;4g;12s;1ss
     Family Didelphidae Gray, 1821 - American opossums
    Count: [*] 11g;77s
       Genus Marmosa Gray, 1821 - murine opossums
      Count: [*] 46s
         Subgenus Marmosa Gray, 1821
        Count: [*] 30s
           Marmosa cinerea group see Genus Micoureus Lesson, 1842
          Count: [*] 9s
             Marmosa alstoni J.A. Allen, 1900 see Micoureus alstoni (Allen, 1900)
            Count: -