Phylum [Mollusca] Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Order Arcoida see Order Pteriomorpha Beurlen, 1944
       Superfamily Arcacea see Superfamily Arcoidea Lamarck, 1809
         Family Arcidae Lamarck, 1809 - arks
           Subfamily Arcinae Lamarck, 1809
             1 Genus Arca Linnaeus, 1758
             2 Genus Barbatia Gray, 1842
             3 Genus Bentharca Verrill & Bush, 1898
             4 Genus Trisidos Röding, 1798