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9 August

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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 search fields. Either way, you win!

Taxa known only as fossils are highlighted in gray. Those without representatives in fresh waters are highlighted in gold.



Bivalvia | Unionoida | Unionidae | Unio | Unio crassus

NOTICE! This version of the MUSSELpdb online is no longer supported or up-to-date. It will be removed from this web site in the summer of 2019.

Click here to view these data in the current, updated version. Or, click here to browse from the starting page.

Unio stepanoffi Drouët, 1881: taxonomic history

Drouët, 1881, Unionidae Russie: 15.

Taxonomic History
=Unio stepanoffi Drouët, 1881. — Kantor et al. (2010: 329).
+Unio crassus gontieri Bourguignat, 1856. — Haas (1969: 53).
+Unio stevenianus Krynicki, 1837. — Zhadin (1965: 244).
+Unio crassus gontieri Bourguignat, 1856. — Haas (1940: 131).
=Unio (s.s.) crassus var. stepanovi [sic] Drouet, 1881. — Zhadin (1938: 90).
*** OMITTED *** — Simpson (1914).
=Unio stepanoffi Drouët, 1881. — Westerlund (1890: 77).
=Unio stepanoffi Drouët. — Kobelt (1886: 36).
=Unio stepanoffi Drouët (sp. n.). — Drouët (1881: 15).

+ Unio crassus

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