Class [Mammalia] Linnaeus, 1758 - mammals
Count: [*] 21o;132f;1061g;4316s; ‡1f;5g;38s
   Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
  Count: [*] 10f;77g;202s; ‡3s
     Family Hippopotamidae Gray, 1821 - hippopotamuses
    Count: [*] 2g;2s
       Genus Choeropsis Leidy, 1853 - pygmy hippopotamus
      Count: [*] 1s
         1 Choeropsis liberiensis (Morton, 1844) - pygmy hippopotamus
        Count: -