living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Class Bivalvia Linnaeus, 1758 - bivalves
             Subclass Pteriomorphia Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944
               Superorder Prionodonta McNeil, 1937 see Superorder Filibranchia
                 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 Litharca Gray, 1842
                         4 Genus Trisidos Röding, 1798