Class Mammalia Linnaeus, 1758 - mammals
   Subclass †Allotheria Marsh, 1880
     Order †Multituberculata Cope, 1884
       Family †Arginbaataridae Hahn & Hahn, 1983, incertae sedis [monotypic]
         1 Genus †Arginbaatar Trofimov, 1980 [monotypic]