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Casas de la Dehesilla, Madrid, Spain
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Cosmarium observed in freshwater sediments in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics. This work was supported by the Australian Biological Resources Study.
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Micrasterias americana shows a very special morphological phenomenon. The four minor processes of apical lobes are optional. But if some of them are formed they show rotational symmetry according to direction of the appendices. This depth of focus picture assembling 14 high resolution shots showes a specimen with one appendix formed. See zip archive for details. Sample from spagnum pond situated in the northern alpine region of Austria near Salzburg. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Cosmarium protractum (NÃG.) DE BARY var. procerum LENZENW. The cells are only little longer than wide. The cell halves form three lobes, the lateral lobes are unequally rounded off, whereby they appear gently rolling. The vertex lobes are slightly widened outwards, rounded off laterally and slightly concave in the center. The central cuts are deep and outward extended. At the basis of both cell halves there is a hump, which is covered with larger verrucae. The remaining cell wall is covered with smaller warts. The vertex view is oblong oval with one distinct surface bulg each at the sides. Length 95 - 100 µm, width 55 - 65 µm. Occurrence: New description, well-known only from Greenland so far.
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Scale bar indicates 50 µm.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.Image under Creative Commons License V 3.0 (CC BY-NC-SA).
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San Martin De Castaneda, Castille and Leon, Spain
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Canencia, Madrid, Spain
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Covaleda, Castille and Leon, Spain
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Villoslada de Cameros, La Rioja, Spain
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Galende, Castille and Leon, Spain
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Ribadelago, Castille and Leon, Spain
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Hoyo de Manzanares, Madrid, Spain
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Villoslada de Cameros, La Rioja, Spain
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Ribadelago de Franco, Castilla y Len, Espaa
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Ribadelago, Castille and Leon, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Lumbreras, La Rioja, Espaa
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Ribadelago de Franco, Castille and Leon, Spain
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Lumbreras, La Rioja, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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A Veiga, Galicia, Spain
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Soba, Cantabria, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Vallibona, Valencia, Spain