Class Mammalia Linnaeus, 1758 - mammals "Eupantotheria" Kermack & Mussett, 1958, incertae sedis [paraphyletic] Superorder †Dryolestoidea Butler, 1939 Order †Dryolestida Prothero, 1981 Family †Dryolestidae Marsh, 1879 Genus †Phascolestes Owen, 1871 [monotypic] 1 †Phascolestes mustelulus (Owen, 1871)