Class [Mammalia] Linnaeus, 1758 - mammals Order Pinnipedia Illiger, 1811 - seals, sea lions, and walrus see Parvorder Pinnipedia Illiger, 1811 Family Phocidae Gray, 1821 - true seals Genus Hydrurga Gistel, 1848 - leopard seal 1 Hydrurga leptonyx (Blainville, 1820) - leopard seal