Class Bivalvia Linnaeus, 1758 - bivalves
   Subclass Autobranchia Grobben, 1894
     Superorder Heteroconchia Gray, 1854
       Clade Heterodonta Neumayr, 1884
         Order Venerida Gray, 1854
           Superfamily Sphaerioidea Deshayes, 1855 (1820)
             1 Family Sphaeriidae Deshayes, 1855 (1820) - freshwater fingernail clams
             2 ?Family †Ferganoconchidae Martinson, 1961
             3 Family †Kijidae Kolesnikov, 1977
             4 Family †Limnocyrenidae Kolesnikov, 1977
             5 ?Family †Neomiodontidae Casey, 1955
             6 Family †Pseudocardiniidae Martinson, 1961
             7 Family †Sibireconchidae Kolesnikov, 1977