Class Bivalvia Linnaeus, 1758 - bivalves
Status: extant
   Subclass Autobranchia Grobben, 1894
  Status: extant
     Superorder Heteroconchia Gray, 1854
    Status: extant
       Clade Heterodonta Neumayr, 1884
      Status: extant
         Order †Orthonotida Pojeta, 1978 [monotypic]
        Status: fossil
           1 Superfamily †Orthonotoidea Miller, 1877
          Status: fossil