Category:Organisms on black background
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This category has the following 3 subcategories, out of 3 total.
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Media in category "Organisms on black background"
This category contains only the following file.
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Coscinodiscus oculus-iridis (Ehrenberg) Ehrenberg 1840 diatom shell. Colored SEM image.jpg 4,500 × 4,500; 18.8 MB