The image shows four different types of freshwater mussels, Anodon Aubryi Heude, 1881, USNM 472422, against a dark background.
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The image shows four different types of freshwater mussels, Anodon Aubryi Heude, 1881, USNM 472422, against a dark background. The shells are arranged in a collage-like formation, with text at the top and bottom of the image.