The image shows three different types of oysters on a black background, with the text "Unio contortus muticus heude, 1877 USNM 472400" at the top.
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The image shows three different types of oysters on a black background, with the text "Unio contortus muticus heude, 1877 USNM 472400" at the top. The oysters are arranged in a triangular formation, with one oyster in the center and two on either side. The shells are a light brown color with a glossy sheen, and the text is written in a bold white font.