Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Palaeoheterodonta Newell, 1965 see Clade Palaeoheterodonta Newell, 1965
       Order Unionida Gray, 1854
         Superfamily Muteloidea Gray, 1847 see Superfamily Etherioidea Deshayes, 1832
           Family Mutelidae Gray, 1847 see Subfamily Iridininae Swainson, 1840
             1 Genus Mutela Scopoli, 1777
             2 Genus Aspatharia Bourguignat, 1885
             3 Genus Iridina Lamarck, 1819
             4 Genus Pseudospatha Simpson, 1900
             5 Genus Pteromutela Starobogatov, 1970
             6 Genus Berpolis Leach, 1825