Class Mammalia Linnaeus, 1758 - mammals Subclass †Allotheria Marsh, 1880 Order †Multituberculata Cope, 1884 Suborder †Cimolodonta McKenna, 1975 Superfamily †Ptilodontoidea Gregory & Simpson, 1926 (1887) Family †Neoplagiaulacidae Ameghino, 1890 1 Genus †Neoplagiaulax Lemoine, 1882 2 Genus †Mesodma Jepsen, 1940 3 Genus †Parectypodus Jepsen, 1930