Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972
   Superfamily †Microsyopoidea Osborn & Wortman, 1892
     1 Family †Picromomyidae Rose & Bown, 1996
     2 Family †Microsyopidae Osborn, 1892
     3 Family †Toliapinidae Hooker, Russell & Phélizon, 1999