Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758 Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795 Clade Heterobranchia Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837 Informal Group "Lower Heterobranchia" Family †Kuskokwimiidae Frýda & Blodgett, 2001