Class Mammalia Linnaeus, 1758 - mammals
   Subclass †Allotheria Marsh, 1880
     Order †Multituberculata Cope, 1884
       Suborder †Cimolodonta McKenna, 1975
         Genus †Viridomys Fox, 1971, incertae sedis [monotypic]
           1 †Viridomys ferox Fox, 1971