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 Unionidae Rafinesque, 1820 - pearly mussels
             Subfamily Ambleminae Rafinesque, 1820
               Tribe Lampsilini Ihering, 1901
                 01 Genus Lampsilis Rafinesque, 1820
                 02 Genus Actinonaias Crosse & Fischer, 1894
                 03 Genus Carunculina Simpson, 1898
                 04 Genus Cyprogenia Agassiz, 1852
                 05 Genus Cyrtonaias Crosse & Fischer, 1894
                 06 Genus Dromus Simpson, 1900
                 07 Genus Dysnomia Agassiz, 1852
                 08 Genus Ellipsaria Rafinesque, 1820
                 09 Genus Ensinaia Starobogatov, 1970
                 10 Genus Friersonia Ortmann, 1912
                 11 Genus Glebula Conrad, 1853
                 12 Genus Lemiox Rafinesque, 1831
                 13 Genus Leptodea Rafinesque, 1820
                 14 Genus Ligumia Swainson, 1840
                 15 Genus Medionidus Simpson, 1900
                 16 Genus Micromya Agassiz, 1852, nom. illeg.
                 17 Genus Obliquaria Rafinesque, 1820
                 18 Genus Obovaria Rafinesque, 1819
                 19 Genus Pachynaias Fischer & Crosse, 1894
                 20 Genus Potamilus Rafinesque, 1818
                 21 Genus Ptychobranchus Simpson, 1900
                 22 Genus Simpsonunio Starobogatov, 1970
                 23 Genus Truncilla Rafinesque, 1819
                 24 Genus Villosa Frierson, 1927