Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Pteriomorphia Beurlen, 1944
       Order Arcida Gray, 1854
         1 Family †Catamarcaiidae Cope, 2000
         2 Superfamily Arcoidea Lamarck, 1809
         3 Superfamily †Glyptarcoidea Cope, 1996 [monotypic]
         4 Superfamily Limopsoidea Dall, 1895