Mammaliaformes Rowe 1988
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass †Allotheria Marsh, 1880 see Clade Allotheria Marsh 1880
         Order †Multituberculata Cope, 1884
           Suborder †Cimolodonta McKenna, 1975
             Superfamily †Taeniolabidoidea Granger & Simpson, 1929
               Family †Taeniolabididae Granger & Simpson, 1929
                 Genus †Sphenopsalis Matthew, Granger & Simpson, 1928