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Fig 8: Small colony of C. socialis cells under light microscope.
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Trigonium (try-go-knee-um) or Hydrocera (high-dro-see-ra) is a marine diatom. It is a centric diatom in which a three pointed asymmetry has been imposed. Test only. Differential interference contrast,
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Triceratium moronense.
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Scale bar indicates 10 µm. Sample from North Sea near Heligoland (spring diatom bloom). Use of SEM equipment courtesy of Lab Dr. Karl-Heinz Schäffner, Solingen, Germany.
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Image shows chloroplasts and nuclei. The image was built up using several photomicrographic frames with manual stacking technique. Scale bar indicates 50 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Terpsinoe musica by H. and M. PeragalloDiatomées marines de France et des districts maritimes voisins, par H. et M. Peragallo (b. 1851 and 1853, respectively). Publication info: Grez-sur-Loing,M. J. Tempère,1897-1908.Plate 90
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Mediopyxis helysia.After several minutes of observation chloroplasts are transported to the cell center, maybe to save the nucleus and most of the chloroplasts against harmful amounts of UV radiation. The image was built up using several photomicrographic frames with manual stacking technique. Scale bar indicates 50 m. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at
www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de.
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Fig 1: Schematic drawing of Chaetoceros convolutus
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Triceratium pentacrinus.
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Scale bar indicates 25 µm. Sample from North Sea near Heligoland (spring diatom bloom). Use of SEM equipment courtesy of Lab Dr. Karl-Heinz Schäffner, Solingen, Germany.
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Closeup showing connection site, chloroplasts, sparkling droplets of storage matter and the nuclei with central hyalin nucleolus and the granulated karyoplasma around. Scale bar indicates 25 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Terpsinoe musica by Henri CoupinFrom: Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces / par Henri Coupin (b. 1868).Plate 313: Seen in two directions. Fresh water. About 150 µ long.
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Mediopyxis helysia.Closeup showing labiate processes (rimoportulae), chloroplasts, sparkling droplets of storage matter and the nuclei with central hyalin nucleolus and the granulated karyoplasma around. Scale bar indicates 25 m. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at
www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de.
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Fig 1: Schematic drawing of Chaetoceros concavicornis
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Portrait (girdle view) of two frustules of the centric marine diatom Triceratium pentacrinus (Ehrenberg). Collected from a commercial saltwater aquarium in Boise, Idaho, october 2004. DIC.
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Depth-of-focus image exhibiting structure of the frustules. Chloroplasts are concentrated in cell centers due to long lasting exposition with microscope's illumination. Scale bar indicates 25 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Closeup showing chloroplasts, sparkling droplets of storage matter and the nuclei with central hyalin nucleolus and the granulated karyoplasma around. Scale bar indicates 25 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Group portrait (valve view)of the centric marine diatom, Triceratium pentacrinus (Ehrenberg). Collected from a commercial saltwater aquarium in Boise, Idaho October 2004. DIC.
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Long chains of Odontella aurita accompanied by Chaetoceros danicus and Thalassiosira nordenskjoeldii. Scale bar indicates 100 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Portrait (valve view) of the centric marine diatom, Triceratium pentacrinus (Ehrenberg). Collected from a commercial saltwater aquarium in Boise, Idaho, October 2004. DIC.
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Depth-of-focus image exhibiting structure of the frustules (apical view). Oblique light. Scale bar indicates 50 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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D. brightwelli are elongate cells, triangular in valve view (transapical diameter: 25-60 microns). The cells have long processes extending from the center of thre valve face and sometimes small spines on the valve margin
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E. zodiacus forms long spiralling chains. It has blunt processes connecting adjacent cells. This species can be abundant in autumn