Class Mammalia Linnaeus, 1758 - mammals †"Symmetrodontans" Simpson, 1925, incertae sedis see Infraclass Symmetrodonta Simpson, 1925 Family †Amphidontidae Simpson, 1925 ?Genus †Manchurodon Yabe & Shikama, 1938 [monotypic] †Manchurodon simplicidens Yabe & Shikama, 1938