Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Pteriomorphia Beurlen, 1944
       Order Ostreida Férussac, 1822 [monotypic]
         Superfamily Ostreoidea Rafinesque, 1815
           Family Gryphaeidae Vialov, 1936
             Subfamily Pycnodonteinae Stenzel, 1959
               Tribe †Pycnodontini Malchus, 1990, orth. inval. see Tribe Pycnodonteini Stenzel, 1959