Class [Mammalia] Linnaeus, 1758 - mammals Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972 Family †Picrodontidae Simpson, 1937 Genus †Zanycteris Matthew, 1917 1 †Zanycteris paleocenus Matthew, 1917