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Desmids have the ability to move slowly on the surface excreting mucilage out of special pores. The picture shows this pores of Euastrum oblongum. High resolution DOF picture assembled of over 40 shots (manually stacked) taken with Planapo 63/1.4 showing the multilevel surface structur. See zip archive for details. Sample from sphagnum 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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Canencia, Comunidad de Madrid, Espaa
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Ribadelago de Franco, Castille and Leon, Spain
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Galende, Castille and Leon, Spain
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Hoyo de Manzanares, Madrid, Spain
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Lumbreras, La Rioja, Espaa
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Lumbreras, La Rioja, Spain
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S Pedro, Galicia, Spain
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Rancho de la Herradura, Andalusia, Spain
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El Maillo, Castille and Leon, Spain
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Lumbreras, 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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Galende, Castille and Leon, Spain
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Casa De Banos De Benasque, Aragon, Spain
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A Veiga, Galicia, Espaa
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Rancho de la Herradura, Andalusia, Spain
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Euastrum oblongum (GREV.) RALFS ex RALFS The cells are appr. 2 times longer than wide and slenderly elliptical in shape. The cell halves consists of two clearly distinguishable sets of lobes which are weakly concave in the center. The vertex lobes are clearly contrasted, widened wedge-shaped with a cut in the center. The cuts in the middle of the cell are not peripherally widened. There exists a big pore in the middle of the cell halves between the two humps. Further humps are visible at the lateral lobes. The cell wall is covered with densely packed pores. Length 150 - 170 µm, width 70 - 85 µm. Occurrence: Adaptable alga, ubiquitous
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Canencia, Comunidad de Madrid, Espaa
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Ribadelago de Franco, Castille and Leon, Spain
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Galende, Castille and Leon, Spain
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Hoyo de Manzanares, Madrid, Spain
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Lumbreras, La Rioja, Spain
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Lumbreras, La Rioja, Spain