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 | ... | Unionidae | Ambleminae | Quadrulini | Quadrulina | Theliderma stapes nominal species Unio retusus Say, 1834 Say, 1834. Amer. Conch. 6: ??.
(misidentified reference to Unio retusa Lamarck, 1819) = Theliderma stapes Taxonomic Opinions+ Quadrula (s.s.) stapes (Lea, 1831) — Simpson, 1914 + Quadrula (s.s.) stapes Lea — Simpson, 1900 + Unio retusus Lam. — Conrad, 1853 + Unio stapes Lea — Ferussac, 1835
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