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 | Unioninae | Unionini | Unionina | Unio crassus nominal species Unio besnardianus Locard, 1889  Servain, 1888. Bull. Soc. Malac. France 5: 317. [nomen nudum]
Bourguignat in Locard, 1889. Contr. Faune Malacol. Franc. 13: 141 [35], 206 [100].
‘Servain’ Locard, 1893. Coqu. Eau Douce Saumâtre France: 172, fig. 186 [as ‘besnardinus’].
(renamed Unio besnardi Germain, 1904)
Type(s): LECTOTYPE MNHN_22133 (by Graf, 2011: 463), La Loire, à Saint-Gemmes (Maine-et-Loire).
= Unio crassus Taxonomic Opinions+ Unio crassus Philipsson in Retzius, 1788 — Lopes-Lima et al., 2024 + Unio crassus batavus Maton & Rackett — Haas, 1969 + Unio crassus batavus (Maton & Rackett, 1807) — Haas, 1940 + Unio batavus Maton et Rackett — Germain, 1931 + — Simpson, 1914 + Unio (Batavusiana) besnardi Servain (nom. em.) — Germain, 1904 = Unio (Groupe de l’U. batavus) besnardinus [sic] Servain — Locard, 1893 = Unio besnardianus Servain in Locard, 1889 — Westerlund, 1890 = Unio (Batavusiana) besnardianus Servain — Locard, 1889 = Unio (Bataviana) besnardianus Servain — Servain, 1888
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