Class Mammalia Linnaeus, 1758 - mammals Subclass †Allotheria Marsh, 1880 Order †Multituberculata Cope, 1884 Suborder †Cimolodonta McKenna, 1975 Superfamily †Ptilodontoidea Gregory & Simpson, 1926 (1887) Family †Cimolodontidae Marsh, 1889 Genus †Cimolodonᵀ Marsh, 1889 †Cimolodon nitidusᵀ Marsh, 1889