Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l. Family Fissurellidae Fleming, 1822 - keyhole limpets Subfamily Fissurellinae Fleming, 1822 Genus Diodora Gray, 1821 Diodora cayenensis (Lamarck, 1822) - Cayenne keyhole limpet