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River Mussel or Unio sp., vintage engraved illustration. Dictionary of Words and Things - Larive and Fleury - 1895 Stock Vector Image & Art - Alamy
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River mussel or unio sp., vintage engraving. River mussel or unio sp., vintage engraved illustration. dictionary of words and | CanStock
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European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect
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Shell shape of Unio species according to Zhadin's (1938) system: A, U.... | Download Scientific Diagram
![Morphology of Unio pictorum (left valve). (A) Outer surface showing... | Download Scientific Diagram Morphology of Unio pictorum (left valve). (A) Outer surface showing... | Download Scientific Diagram](https://www.researchgate.net/publication/321812313/figure/fig1/AS:690330781360132@1541599092660/Morphology-of-Unio-pictorum-left-valve-A-Outer-surface-showing-growth-layers-and-a.png)