Kingdom Animalia Linnaeus, 1758 - animals Phylum Mollusca Linnaeus, 1758 - molluscs Subphylum Cyrtosoma Runnegar & Pojeta Jr., 1974 see Phylum Mollusca Linnaeus, 1758 Class Monoplacophora Odhner, 1940 - monoplacophorans Genus †Mellopegma Runnegar & Jell, 1976