Class Mammalia Linnaeus, 1758 - mammals Subclass †Allotheria Marsh, 1880 Order †Multituberculata Cope, 1884 Suborder †Cimolodonta McKenna, 1975 †Paracimexomys group incertae sedis Genus †Bryceomys Eaton, 1995 †Bryceomys hadrosus Eaton, 1995