Class [Mammalia] Linnaeus, 1758 - mammals Order †Plesiadapiformes Simons & Tattersall, 1972 see Suborder Plesiadapiformes Simons & Tattersall, 1972 Family †Picrodontidae Simpson, 1937 Genus †Picrodus Douglass, 1908 †Picrodus silberlingi Douglass, 1908