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Diatom frustules are brittle and delicate. This Pinnularia frustule was broken when it was flattened between the microscope slide and the coverslip.
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Soba, Cantabria, Spain
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Lumbreras, La Rioja, Spain
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Ontgola, Castile-La Mancha, Spain
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Prejano, La Rioja, Spain
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Santa Cruz de la Sierra, Extremadura, Spain
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Collected from Le Barron white cedar swamp on July 1, 2004.
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Ajamil, La Rioja, Spain
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Villoslada de Cameros, La Rioja, Spain
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Barcelona, Catalunya, Espaa
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Luanco, Asturias, Spain
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S Pedro, Galicia, Spain
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Originally referred to by Haeckel as Navicula lyra.
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Torrelles de Foix, Catalonia, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Madrid, Madrid, Spain
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Campillos, Andaluca, Espaa
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Pinnularia viridis.Valvar view. Scale bar indicates 25 m.Sample from a wetland at the Pillersee (Tyrol, Austria). 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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Diatoms are algae which live in little glass boxes or frustules - rather like little petri dishes. Pennate diatoms are motile, and rely on, we believe, the excretion of mucus through a slit in the wall - the slit is the raphe and runs down the flat faces of the petri dishes (frustules in diatom terminology). The frustule is perforated with tiny holes to allow the diatom to excrete waste products, and pick up nutrients, dissolved gases etc. from the surrounding water. This image shows the raphe and the pattern of sculpting in the frustule. Phase contrast.
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Soba, Cantabria, Spain
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Grove, O, Galicia, Spain