Class Mammalia Linnaeus, 1758 - mammals
   Subclass †Allotheria Marsh, 1880
     Order †Multituberculata Cope, 1884
       Suborder †Cimolodonta McKenna, 1975
         Family †Cimolomyidae Marsh, 1889, incertae sedis
           1 Genus †Cimolomysᵀ Marsh, 1889
           2 Genus †Meniscoessus Cope, 1882
           3 ?Genus †Buginbaatar Kielan-Jaworowska & Sochava, 1969 [monotypic]
           4 ?Genus †Essonodon Simpson, 1927 [monotypic]