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Illustration: Antique Engraved Illustration Of Swan Mussel. Vintage Illustration Of Anodonta Cygnea. Old Engraved Picture. Book

ID 262135375 © Romannerud | Megapixl.com

Antique engraved illustration of swan mussel. Vintage illustration of Anodonta cygnea. Old engraved picture. Book illustration published 1907. 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. The shell is thin but large & x28;approximately 10 to 20 cm& x29; and rather flat, even at the umbo. The shell color is often pale greenish or brownish. It differs from Anodonta anatina in being larger shell with straighter, more parallel dorsal and ventral margins the growth lines of the inner, oldest part of the shell are finer and shallower, and reach the margin.

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Antique engraved illustration of swan mussel. Vintage illustration of Anodonta cygnea. Old engraved picture. Book

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