Class Mammalia Linnaeus, 1758 - mammals Subclass †Allotheria Marsh, 1880 Order †Multituberculata Cope, 1884 Suborder †Cimolodonta McKenna, 1975 Superfamily †Ptilodontoidea Gregory & Simpson, 1926 (1887) 1 Family †Ptilodontidaeᵀ Gregory & Simpson, 1926 (1887) 2 Family †Neoplagiaulacidae Ameghino, 1890 3 Family †Cimolodontidae Marsh, 1889 4 ?Genus †Neoliotomus Jepsen, 1930