Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Pteriomorphia Beurlen, 1944
       Order Arcida Gray, 1854
         Superfamily Arcoidea Lamarck, 1809
           1 Family Arcidae Lamarck, 1809 - arks
           2 Family Cucullaeidae Stewart, 1930
           3 Family †Frejidae Ratter & Cope, 1998
           4 Family Glycymerididae Dall, 1908 (1847) - glycymerids
           5 Family Noetiidae Stewart, 1930
           6 Family †Parallelodontidae Dall, 1898