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
                     1 Genus Rhipidondonta
                     2 Subfamily Hyriinae Swainson, 1840
                     3 Subfamily Hyridellinae McMichael, 1955 (1934) see Tribe Hyridellini McMichael, 1955 (1934)
                     4 Subfamily Velesunioninae Iredale, 1934
                     5 Subfamily Lortiellinae Modell, 1942 see Subfamily Velesunioninae Iredale, 1934
                     6 Subfamily Cucumerunioninae Iredale, 1934 see Tribe Hyridellini McMichael, 1955 (1934)
                     7 Subfamily Rectidentinae Modell, 1942