Class Mammalia Linnaeus, 1758 - mammals Subclass †Allotheria Marsh, 1880 Order †Multituberculata Cope, 1884 Suborder †Cimolodonta McKenna, 1975 Family †Eucosmodontidae Jepsen, 1940, incertae sedis Genus †Eucosmodonᵀ Matthew & Granger, 1921