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Scale bar indicates 25 m. Sample from Lake Constance in the vicinity of Bodman. 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 permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Ribadelago de Franco, Castille and Leon, Spain
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Lumbreras, La Rioja, Spain
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Ribadelago, Castille and Leon, Spain
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Detail of the junction of three cells of a coenobium of the chlorophycean, Hydrodictyon reticulatum (Lagerheim, 1894.The tubular coenobia have walls composed of a meshwork of cells whose interspaces are bordered by 5 or 6 cells (five in this case). Coenobia may form nets up to 2 feet in length.The cylindrical cells are uninucleate when toung and become multinucleate as they age. the plastid is peripheral and reticulate in older cells. there are many pyrenoids (seen here). Biflagellate zoospores released within the mother cell wall may may aggregate to form a mini meshwork that is ultimately released as a new coenobium.Collected from a temporary freshwater pond near Boise, Idaho. August 2005.DIC.
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Ankistrodesmus (anne-kissed-ro-des-muss) is a green alga, small tangled clusters of twisted cells. Four cells in this tangle. Not uncommon in freshwater habitats. Differential interference contrast.
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Pediastrum braunii.
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The cells of Hydrodictyon have multiple nuclei with large central nucleoli. In the picture are two of them visible in the cell center and at the right end of the cell. The larger, dark-green body in the left half cell is a pyrenoid. Scale bar indicates 25 m.Sample from the Lake Constance (vicinity of Bodman). 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 permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Neila, Castille and Leon, Spain
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San Martin De Castaneda, Castille and Leon, Spain
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Mahide, Castille and Leon, Spain
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Miranda do Douro, Bragana, Portugal
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Logroo, La Rioja, Espaa
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Coelastrum astroideum (De Notaris 1867). Collected from freshwater aquaculture tub near Boise, Idaho December 2005. Brightfield.
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Ankistrodesmus (anne-kissed-ro-des-muss) is a green alga, small tangled clusters of twisted cells. Two tangles seen here making a spectacle of themselves. Not uncommon in freshwater habitats. Phase contrast.
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Pediastrum cruciatum.
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Malgrat de Mar, Catalonia, Spain
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San Martin De Castaneda, Castille and Leon, Spain
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Miranda do Douro, Bragana, Portugal
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Logroo, La Rioja, Espaa
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Coelastrum astroideum (De Notaris 1867). Collected from freshwater aquaculture tub near Boise, Idaho December 2005.
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Ankistrodesmus (anne-kissed-ro-des-muss) is a green alga, small tangled clusters of twisted cells. Two tangles seen here Not uncommon in freshwater habitats. Phase contrast.
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Pediastrum darwinii.