![European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0075951121000554-gr2.jpg)
European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect
![Shell shape of Unio species according to Zhadin's (1938) system: A, U.... | Download Scientific Diagram Shell shape of Unio species according to Zhadin's (1938) system: A, U.... | Download Scientific Diagram](https://www.researchgate.net/profile/Manuel-Lopes-Lima/publication/318013566/figure/fig2/AS:510522997313536@1498729575983/Shell-shape-of-Unio-species-according-to-Zhadins-1938-system-A-U-pictorum-ZSU-U3_Q640.jpg)
Shell shape of Unio species according to Zhadin's (1938) system: A, U.... | Download Scientific Diagram
![European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0075951121000554-gr3.jpg)
European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect
![European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0075951121000554-gr4.jpg)
European freshwater mussels (Unio spp., Unionidae) in Siberia and Kazakhstan: Pleistocene relicts or recent invaders? - ScienceDirect
![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)