Class Mammalia Linnaeus, 1758 - mammals "Eupantotheria" Kermack & Mussett, 1958, incertae sedis [paraphyletic] Superorder †Dryolestoidea Butler, 1939 Order †Dryolestida Prothero, 1981 Family †Paurodontidae Marsh, 1887 Genus †Euthlastus Simpson, 1927 [monotypic] †Euthlastus cordiformis Simpson, 1927