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 †Ptilodontoidea Gregory & Simpson, 1926 (1887) 1 Family †Cimolodontidae Marsh, 1889 2 Family †Ptilodontidae Gregory & Simpson, 1926 (1887)