Phylum [Mollusca] Linnaeus, 1758 - molluscs Count: - Class Bivalvia Linnaeus, 1758 - bivalves Count: 6o Subclass Pteriomorphia Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944 Count: 3o Order Arcoida see Order Pteriomorpha Beurlen, 1944 Count: -