Microcondylaea bonellii is a species of bivalve belonging to the family Unionidae. The species is endemic to South Europe.

Microcondylaea bonellii is a freshwater bivalve occurring in both rivers and lakes. It was known from Switzerland, Italy, Slovenia, Croatia, Montenegro, Lake Ohrid in Albania/North Macedonia, and Greece. However, it is extinct in Switzerland and Greece and possibly extinct in Lake Ohrid. Small populations remain in northern Italy, Slovenia, Montenegro, Albania and Croatia.

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