Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     1 Subclass Protobranchia Pelseneer, 1889
     2 Subclass Pteriomorphia Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944
     3 Subclass Palaeoheterodonta Newell, 1965 see Clade Palaeoheterodonta Newell, 1965
     4 Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
     5 Subclass Anomalodesmata Dall, 1889 [monotypic] see Order Anomalodesmata Dall, 1889