Class [Mammalia] Linnaeus, 1758 - mammals
   Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972
     1 Superfamily †Plesiadapoidea Trouessart, 1897
     2 Superfamily †Microsyopoidea Osborn & Wortman, 1892
     3 Family †Picrodontidae Simpson, 1937
     4 Family †Picromomyidae Rose & Bown, 1996