Unionoida | Unionoidea | Unionidae | Unioninae | Unionini | Unio crassus nominal species Unio sanderi Bourguignat, 1862
Bourguignat, 1862, Malacol. Lac Quatre-Cantons: 55.
Bourguignat, 1864, Malac. Aix-les-Baines: 76.
= Unio crassus Taxonomic Opinions
+ Unio mancus var. macrorhynchus Bourguignat — Germain, 1931
+ Unio (Groupe de l’U. macrorhynchus) sandriopsis Bourguignat — Locard, 1893
+ Unio sandriopsis (Bgt.) Servain, 1885 — Westerlund, 1890
+ Unio (Sandriana) sandriopsis Bourguignat — Locard, 1889
+ Unio sandriopsis Bourguignat, mss. — Servain, 1885
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