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
                 Genus Lampsilis Rafinesque, 1820
                   1 Subgenus Delphinonaias Crosse & Fischer, 1894
                   2 Subgenus Disconaias Fischer & Crosse, 1894
                   3 Subgenus Mesonaias Crosse & Fischer, 1894
                   4 Subgenus Phyllonaias Fischer & Crosse, 1894
                   5 Subgenus Ortmanniana Frierson, 1927
                   6 Subgenus Venustaconcha Thiele, 1934