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Fig 1: Schematic drawings of Chaetoceros socialis chains; a. vegetative cells, b. cells producing resting spores.
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O. sinensis is closely related to O. mobiliensis and O. regia but the processes are nearly parallel to the cell axis and the processes are close to the processes. The valve face between the processes is flat or concave.
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Phasde contrast micrograph of living diatom - cracked.
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Ditylum (die-tie-lum) brightwellii. Marine centric diatom, cylindrical frustule from the ends of which is a long spine or labiate process. This contains two products of cell division, and each cell has numerous golden chloroplasts. Differential interference microscopy.
data on this strain.
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Chain forming diatom, which produces wing like extensions one valve end, which link adjacent cells. This is a cosmopolitan species.
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Image shows chloroplasts, small sparkling droplets of storage matter, and the fine connection tubes between the cells. Scale bar indicates 100 µm. 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 americana 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.Image shows chloroplasts, small sparkling droplets of storage matter, and the fine tubes of the labiate processes (rimoportulae). Scale bar indicates 100 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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Peniscola, Valencia, Spain
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Pera, Faro, Portugal
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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 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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Grove, O, Galicia, Spain
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Peniscola, Valencia, Spain
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Grove, O, Galicia, Spain
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Balea, Galicia, Spain
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16 level composite light photomicrograph of the type specimen.
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Fig 2: Lugol's stained colony of cells
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Biddulphia pulchella.
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Biddulphia ?. A triangular version? Collected by ATOL special protist hunters 1st ocean taw in Woods Hole during the Protistology Workshop at MBL, October-November 2005. Isolation and art by Adrian Reyes-Prieto.
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Ditylum (die-tie-lum) brightwellii. Marine centric diatom, cylindrical frustule from the ends of which is a long spine or labiate process. Many small plastids and central nucleus. Differential interference microscopy.
data on this strain.
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Odontella (owe-don-tell-a) mobiliensis, a centric diatom. The frustule or shell is formed of two valves joined by girdle bands. Many small peripheral chloroplasts and a central nucleus. Differential interference microscopy.
data on this strain.
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Image shows chloroplasts, small sparkling droplets of storage polysaccharide chrysolaminarin used as carbohydrate food reserve, and the fine connection tubes between the cells. The image was built up using several photomicrographic frames with manual stacking technique. Scale bar indicates 50 µm. 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 americana 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: frustrules (600x magnification). sea water
