Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Palaeoheterodonta Newell, 1965
         Order Unionida Gray, 1854
           Superfamily Unionoidea Rafinesque, 1820
             Family Unionidae Rafinesque, 1820 - pearly mussels
               Subfamily Unioninae Rafinesque, 1820
                 1 Tribe Unionini Rafinesque, 1820
                 2 Tribe Anodontini Rafinesque, 1820