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 Paleoheterodonta see Order Unionida Gray, 1854
               Order Unionoida see Order Unionida Gray, 1854
                 Superfamily Unionacea Fleming, 1828 see Superfamily Unionoidea Rafinesque, 1820
                   Family Hyriidae Swainson, 1840
                     Subfamily Hyriinae Swainson, 1840
                       1 Genus Diplodon Spix, 1827
                       2 Genus Prisodon Schumacher, 1817
                       3 Genus Paxyodon Schumacher, 1817
                       4 Genus Castalia Lamarck, 1819
                       5 Genus Castalina Ihering, 1891
                       6 Genus Castaliella Simpson, 1900
                       7 Genus Callonaia Simpson, 1900