Phylum [Mollusca] Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Pteriomorphia Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944 1 Order Arcoida see Order Pteriomorpha Beurlen, 1944 2 Order Mytiloida Férussac, 1822 see Order Mytilida Férussac, 1822 3 Order Pterioida Newell, 1965 see Order Pteriida Newell, 1965