File:Stromatolitic-structures-built-by-filamentous-sheathed-non-heterocystous-cyanobacteria-recognized-as-two-new-species-of.jpg
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Stromatolitic-structures-built-by-filamentous-sheathed-non-heterocystous-cyanobacteria-recognized-as-two-new-species-of.jpg (600 × 497 pixels, file size: 53 KB, MIME type: image/jpeg)