Unionoida | Unionoidea | Unionidae | Unioninae | Unionini | Unio crassus nominal species Unio necomensis Locard, 1889
‘Drouët’ of Authors.
Locard, 1889, Contr. Faune Malacol. Franc. 13: 132 [26].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 159.
Germain, 1931, Faune de France 22: 725.
(error for Unio neocomensis Drouët, 1881)
= Unio crassus Taxonomic Opinions
+ Unio mancus var. macrorhynchus Bourguignat — Germain, 1931
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