Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Pteriomorphia Beurlen, 1944
       Order Ostreida Férussac, 1822 [monotypic]
         Superfamily Ostreoidea Rafinesque, 1815
           1 Family Ostreidae Rafinesque, 1815 - true oysters
           2 Family †Arctostreidae Vialov, 1983
           3 Family †Chondrodontidae Freneix, 1960
           4 Family Gryphaeidae Vialov, 1936