Class [Mammalia] Linnaeus, 1758 - mammals
   Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972
     Superfamily †Microsyopoidea Osborn & Wortman, 1892
       Family †Microsyopidae Osborn, 1892
         Genus †Microsyops Leidy, 1872
           1 †Microsyops angustidens (Matthew, 1915)
           2 †Microsyops latidens (Cope, 1882)
           3 †Microsyops scottianus (Cope, 1881)
           4 †Microsyops elegans (Marsh, 1871)
           5 †Microsyops annectens (Marsh, 1872)
           6 †Microsyops kratos Stock, 1938