Description
Anodonta cygnea (latin), swan mussel (en), Större dammussla (sv) from Sweden
Date 200606
Author Boldie
Source: https://commons.wikimedia.org/wiki/File:Anodonta_cygnea1.jpg

The swan mussel, Anodonta cygnea, is a large species of freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels. Because of its morphological variability and its wide range of distribution, there are over 500 synonyms for this species. Its native distribution is European-Siberian. The geographical distribution of this species is from the British Isles east to Siberia, and south into northern Africa. Order: Unionoida, Family: Unionidae.