Sampling date 04/2011. Scale bars indicate 50 µm (1), 25 µm (2).Nodules on the valves contain pyrenoids. Place name: orth Sea around Heligoland Latitude: 54.186311 Longitude: 7.895034Microscope Zeiss Universal, camera Olympus C7070WZ. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
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