Class Mammalia Linnaeus, 1758 - mammals Subclass †Allotheria Marsh, 1880 Order †Multituberculata Cope, 1884 Suborder †Cimolodonta McKenna, 1975 Family †Microcosmodontidae Holtzman & Wolberg, 1977, incertae sedis Genus †Microcosmodonᵀ Jepsen, 1930