Please help: Molluscs and Mussels of the Dnieper Kiev Ukraine

The Dnieper is one of the major rivers of Europe and flowing through Russia, Belarus and Ukraine to the Black Sea. The river is part of the Quagga mussel's native range. The mussel has been accidentally introduced around the world where it has become an invasive species.

During my stay in Kiev (Ukraine) I saw some other mussels and molluscs. I'm not an expert and its difficult for me to differ the several species. So, I would be very pleased if you can help me with the identification of the species below. Please write your answer in the comments.

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