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Valganon, La Rioja, Spain
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Ribadelago, Castille and Leon, Spain
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Ribadelago, Castille and Leon, Spain
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SEM of coccosphere. Flagellar opening is toward top right. Note considerable variation in coccolith size and wing development
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Rhipidodendron (rip-ee-doe-dend-ron, is a colonial spongomonad flagellate, in which the cells are located at the end of a branching (aborescent) colony. The matrix of the colony is formed from adhering small globules of mucilage. The branches are flat, with several channels in each blade. One cell is located at the end of each channel and the cells have two flagella. Phase contrast.
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Composite image showing single scales (upper left). Upper left corner treated with hydrofluoric acid to show siliceous nature, vertical scale from trophic cell (Nomarski image upper right corner), larger scale from the cyst (middle right image). The lower image is a transmission electron micrograph of a thin section showing the scales adhering to the outer surface of the cell.
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Transmission electron micrograph of a whole plate scale from the surface of a cell.
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Small centrohelid heliozoon, thin axopodia carry kinetocysts - a type of extrusome - that look like granules on the axopodia. The cell body seems to lack any surrounding layer of mucus, spines or scales. Phase contrast microscopy.
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Galende, Castile and Len, Spain
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, Andaluca, Espaa
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Ribadelago de Franco, Castille and Leon, Spain
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Broken coccolith of H. wallichii in distal view, breakage shows the proximal shield.
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Various teratological (malformed) scales. Transmission electron micrographs of whole scales.
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Portrait of Acanthocystis aculeata HERTWIG & LESSER, 1874, a heliozoan with long thin radiating axopodia containing bead-like extrusomes and layered surface plates with shorter curved sharp projecting spines. This individual contains zoochlorellae. From freshwater pond near Boise, Idaho. Brightfield.
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Chlamydaster (Clam-ee-das-ter), a centrohelid heliozoon in which the body is surrounded by a layer of mucus and it may have bacteria or other small particles adhering to the outside. With fine arms, not tapering. Phase contrast.
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Galende, Castile and Len, Spain
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Lumbreras, La Rioja, Spain
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Helicosphaera wallichii (Lohmann 1902) Okada & McIntyre 1977 [Coccolithophora] Like H. carteri but: central-area with oblique twisted slits; bridge typically better developed; and liths perhaps slightly larger. NB Slits obliquity: In distal view the slits are rotated about 10-20° clockwise (and so away from the wing), this is the ânormalâ sense of obliquity in Helicosphaera, as shown by many fossil species. The Pleistocene species H. inversa is similar but shows the opposite sense of obliquity. HOL phase - unknown but H. wallichii often co-occurs with Syracolithus dalmaticus in our samples (Geisen et al., 2004).
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Aka Heterophrys fockii. Scale bar indicates 25 µm. 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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Galende, Castile and Len, Spain
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Melgar de Tera, Castille and Leon, Spain
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This tiny prymnesiomonad belongs to group of Coccolithophoraceae. In a mucous cover they wear lots of calcified scales (coccoliths). The depth of focus picture shows coccoliths covering the monad cell. Picture generated from 7 shots using CombineZ by Alan Hadley. For details see ZIP archive. Collected from littoral region (stand of Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.