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Cells at two focal levels. Material from a plankton tow off Martha's Vineyard, Massachusetts. Image by Jeff Cole.
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This species consists of very small cells which are united into curved chains. Cells have three short setae and one long one which causes the formation of larger secondary colonies by linking up in the centre of the colony with the long setae of other chains
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Closeup of Porosira glacialis chain. Note that the delicate spines are chitinous. Focus on frustule surface. Scale bar indicates 50 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Material from the Netherlands.
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After several minutes of observation chloroplasts are transported to the cell center, maybe to save the nucleus and most of the chloroplasts against harmful amounts of UV radiation. The image was built up using several photomicrographic frames with manual stacking technique. Scale bar indicates 50 µm. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Valves are cylindrical terminating in a proboscis. Processes are absent. This is a temprate, coastal species.
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Terpsinoe americana by Lisa M. Weimer (USGS)Found in Chesapeake Bay Diatoms by Lisa M. Weimer, an online USGS publication located at http://pubs.usgs.gov/pdf/of/of99-45/diatom.pdfPlate 2Terpsinoe americana (Bail.) Rolfs, PTMC 3-P-2 422-424 cm., x 2000.
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Madrid, Comunidad de Madrid, Espaa
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Coscinodiscus radiatus.Valvar view. Scale bar indicates 25 m. Sample from North Sea near Heligoland (spring diatom bloom). The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at
www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de..
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Pera, Faro, Portugal
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Soba, Cantabria, Spain
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Formentera, Illes Balears, Espaa
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Reboredo, Galicia, Espaa
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Rhizosolenia setigera shortly after binary fission, accompanied by Thalassiosira nordenskjoeldii and Coscinodiscus wailesii. Scale bar indicates 100 m. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at
www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de.
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Porosira glacialis.Short chain of Porosira glacialis. Note that the delicate spines are chitinous. Scale bar indicates 50 m. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at
www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de.
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Hoyo de Manzanares, Madrid, Spain
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O Grove, Galicia, Spain
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Mediopyxis helysia.Image shows chloroplasts, small sparkling droplets of storage polysaccharide chrysolaminarin used as carbohydrate food reserve, and the fine tubes of the labiate processes (rimoportulae). The image was built up using several photomicrographic frames with manual stacking technique. Scale bar indicates 50 m. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at
www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de.
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Balea, Galicia, Spain
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Grove, O, Galicia, Spain
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A Veiga, Galicia, Espaa
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Mahide, Castille and Leon, Spain
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Peniscola, Valencia, Spain
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Cocconeis scutellum.Scale bar indicates 50 m.Collected from Bodden, the brackish waters lying between the isles of Hiddensee and Ruegen (German Baltic Sea). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at
www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de.