Kingdom Animalia Linnaeus, 1758 - animals Phylum Mollusca Linnaeus, 1758 - molluscs Subphylum Cyrtosoma Runnegar & Pojeta Jr., 1974 see Phylum Mollusca Linnaeus, 1758 Class Cephalopoda Cuvier, 1795 - cephalopods Subclass †Bactritoidea Shimanskiy, 1951 Genus †Bactrites Sandberger, 1842 Genus †Lobobactrites Schindewolf, 1932