Kingdom Animalia Linnaeus, 1758 - animals Phylum Mollusca Linnaeus, 1758 - molluscs Subphylum Diasoma Runnegar & Pojeta Jr., 1974 see Phylum Mollusca Linnaeus, 1758 Class Scaphopoda Bronn, 1862 - tusk shells Order Siphonodentalioida see Order Gadilida Starobogatov, 1974 Genus Dischides Jeffreys, 1867