Class Mammalia Linnaeus, 1758 - mammals
   "Eupantotheria" Kermack & Mussett, 1958, incertae sedis [paraphyletic]
     Superorder †Dryolestoidea Butler, 1939
       Order †Amphitheriida Prothero, 1981 [monotypic]
         Family †Amphitheriidae Owen, 1846 [monotypic]
           Genus †Amphitherium Blainville, 1838
             1 †Amphitherium prevostiiᵀ (Mayer, 1832)
             2 †Amphitherium rixoni Butler & Clemens, 2001 see Amphitherium prevostii (Mayer, 1832)