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)
             Family Sphaeriidae Deshayes, 1855 (1820) - freshwater fingernail clams
               1 Subfamily Sphaeriinae Deshayes, 1855 (1820)
               2 Subfamily Euglesinae Pirogov & Starobogatov, 1974
               3 Subfamily Euperinae Heard, 1965
               4 Subfamily Pisidiinae Gray, 1857