Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Palaeoheterodonta Newell, 1965 see Clade Palaeoheterodonta Newell, 1965
       Order Unionida Gray, 1854
         Superfamily Unionoidea Rafinesque, 1820
           Family Hyriidae Swainson, 1840
             Subfamily Hyriinae Swainson, 1840
               Genus Hyridella Swainson, 1840
                 1 Subgenus Lortiella Iredale, 1934
                 2 Subgenus Protohyridella Cotton & Gabriel, 1932
                 3 Subgenus Velesunio Iredale, 1934 see Genus Velesunio Iredale, 1934