Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Pteriomorphia Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944
       1 Order Arcida Gray, 1854
       2 Order Mytilida Férussac, 1822 [monotypic]
       3 Order Pteriida Newell, 1965
       4 Order Limida Moore, 1952 [monotypic]
       5 Order Ostreida Férussac, 1822