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 intermedius Eaton & Cifelli, 2001