Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972
   Superfamily †Microsyopoidea Osborn & Wortman, 1892
     Family †Picromomyidae Rose & Bown, 1996
       1 Genus †Picromomys Rose & Bown, 1996
       2 Genus †Alveojunctus Bown, 1982