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 Amblemini Rafinesque, 1820
                 Genus Caelatura orth. inval. see Genus Coelatura Conrad, 1853
                   1 Subgenus Grandidieria Bourguignat, 1885 see Genus Grandidieria Bourguignat, 1885
                   2 Subgenus Kalliphenga Haas, 1936
                   3 Subgenus Kistinaia Haas, 1936
                   4 Subgenus Laevirostris Simpson, 1900
                   5 Subgenus Mweruella Haas, 1936 see Genus Mweruella Haas, 1936
                   6 Subgenus Rhytidonaia Haas, 1936
                   7 Subgenus Zairella Vaught, 1989, orth. inval. see Subgenus Zairiella Haas, 1962
                   8 Subgenus Zairia Rochebrune, 1886