| Page last updatedWed 1 October 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! 
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 Bivalvia order VENEROIDA  |  superfamily CYRENOIDEA Gray, 1840: 95 Recent species. synonymy (4 
             nomina) | 3 families
 Distribution: East Asia, Australasia, Afrotropics, South America, North Eurasia, North America, Central America
 |  | superfamily MACTROIDEA Lamarck, 1809: 1 Recent species.synonymy (1 
             nomen) | 1 family
 Distribution: East Asia
 |  | superfamily ARCTICOIDEA R.B. Newton, 1891: fossil only.synonymy (1 
             nomen) | 1 family
 |  | superfamily GLOSSOIDEA Gray, 1847 (1840): fossil only.synonymy (0 
             nomina) | 1 family
 |  | superfamily VENEROIDEA Rafinesque, 1815: fossil only.synonymy (0 
             nomina) | 1 family
 Distribution: Afrotropics
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