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] 1 Genus †Amphitherium Blainville, 1838