| Page last updatedSun 07 Sep 2025
 | 
  | The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win! The synonymy list the nominal family-group level taxa circumscribed within the valid taxon. The MUSSEL Project Database has moved to a new server, with a new URL! The new address for this page is: https://musselpdb.org/db.php?ty=validfam_syn&id=Sphaerioidea Search the database pages:
 
 |  | Bivalvia | Sphaerioida superfamily SPHAERIOIDEA Deshayes,  (1820): nominal family-group taxa1 family
 
  | CYCLADOIDEA Rafinesque, 1820
    Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 318 [as ‘Cycladia’].
 Type genus: Cyclas Lamarck, 1799 = Sphaerium
 |  | SPHAERIOIDEA Deshayes, 1854
    Deshayes, 1854, Cat. Bivalves Brit. Mus. part 1: 261.
 Jeffreys, 1862, Br. Conchol. 1: 1.
 Type genus: Sphaerium Scopoli, 1777 = Sphaerium
 |  | PISIDIOIDEA Turton, 1857
    Gray in Turton, 1857, Man. Land Fresh-Water Shells Brit. Is.: 263 [as ‘Pisidiadae’].
 Type genus: Pisidium Pfeiffer, 1821 = Pisidium
 |  | CORNEOCYCLADOIDEA Hannibal, 1912
    Hannibal, 1912, Proc. Malac. Soc. London 10(2): ??.
 Type genus: Corneocyclas Blainville, 1818 = Sphaerium
 |  | EUPEROIDEA Heard, 1965
    Heard, 1965, unknown publication: ??.
 Type genus: Eupera Bourguignat, 1854 = Eupera
 |  | SPHAERIASTROIDEA Alimov & Starobogatov, 1968
    Alimov & Starobogatov, 1968, Moll. & Role in Ecosyst.: ??.
 Type genus: Sphaeriastrum Bourguignat, 1854 = Sphaerium
 |  | EUGLESOIDEA Pirogov & Starobogatov, 1974
    Pirogov & Starobogatov, 1974, Zool. Zhur. 53(3): 327.
 Type genus: Euglesa Jenyns, 1832 = Euglesa
 |  | MUSCULIOIDEA Stadnichenko, 1984
    Starobogatov in Stadnichenko, 1984, Fauna Ukrayiny 29: 155.
 Type genus: Musculium Link, 1807 = Sphaerium
 |  | LACUSTRINOIDEA Korniushin, 1989
    Korniushin, 1989, Zool. Zhur. 68(11): 22.
 Type genus: Lacustrina Sterki, 1916 = Pisidium
 |  | NEOPISIDIOIDEA Korniushin, 1989
    Korniushin, 1989, Zool. Zhur. 68(11): 22.
 Type genus: Neopisidium Odhner, 1921 = Odhneripisidium
 |  |  | Page updated: 08:14:45 Sun 07 Sep 2025 |  |