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