Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758 Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795 Clade Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960 Family †Spirostylidae Cossmann, 1909, incertae sedis