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Portion 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. 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. Brightfield.
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Pediastrum is a large, flat desmid. Many cells join together by their cellulose walls to form a regular, star-shaped array.
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Pediastrum furcatum.
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Several prominent nuclei and pyrenoids. Focus on the pyrenoids. 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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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, 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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Pediastrum lunatum.
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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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Miranda do Douro, Bragana, Portugal
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Logroo, La Rioja, Espaa
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A rare variety of Pediastrum duplex in Lake Kinneret. This specimen was collected at the shore by the Kinneret Limnological Laboratory in June 2006.
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Pediastrum octonum.
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Malgrat de Mar, Catalonia, Spain
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Miranda do Douro, Bragana, Portugal
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Logroo, La Rioja, Espaa
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Pediastrum solare.
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Several prominent nuclei and pyrenoids. Focus on the nuclei. 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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Miranda do Douro Municipality, Braganca, Portugal
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Ajamil, La Rioja, Espaa
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Pediastrum trochiscus.
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Scale bar indicates 50 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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Miranda do Douro, Bragana, Portugal