The image shows a group of four different types of oysters on a black background, with the text "Unio Moreletianus Heude, 1883" at the top.
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The image shows a group of four different types of oysters on a black background, with the text "Unio Moreletianus Heude, 1883" at the top. The oysters are arranged in a symmetrical pattern, with each one having a unique shape and texture. The colors of the oysters range from light brown to dark brown, with some having a glossy sheen. The text is written in a bold, white font, making it stand out against the dark background.
