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Roscoffia sp
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Roscoffia (roz-coffee-a) capitata Balech 1956. The image shows a cell in left lateral view. The cingulum is near the anterior end of the cell. There are no plastids visible, however a large reddish food particle is visible. The cell is thecate, and there are sulcal lists present (on the left side of the image).
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Herdmania (herd-mane-ee-a) litoralis Dodge 1981. This is an armoured dinoflagellate with a superficial similarity to Katodinium. The cingulum is located around the middle of the cell - although it does not completely encircle the cell. There is an apical hook pointed to the left of the cell (this cell is viewed from its ventral surface), the nucleus is in the upper right portion of the cell (upper left in the image), the large empty-looking structure in the hypotheca (posterior part of the cell) is the pusule, an organelle of uncertain function.
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Herdmania litoralis, from the dorsal side, observed in marine muds and sandy sediments in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics. This work was supported by the Australian Biological Resources Study.
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Herdmania litoralis, from the dorsal side, observed in marine muds and sandy sediments in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics. This work was supported by the Australian Biological Resources Study.
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Herdmania litoralis Dodge 1981
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Herdmania litoralis Dodge 1981
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Herdmania litoralis Dodge 1981
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Herdmania litoralis Dodge 1981
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This image was made from samples taken during a scientific cruise in the Pacific. Water was filtered to concentrate the organisms that were present, then dried onto a thin sheet of plastic and then shadowed with a fine layer of metal to provide contrast. The preparation was then observed with an electron-microscope. This technique has been used to document the diversity of marine microbes, especially, protists in the oceans.
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Sabulodinium (sab-you-low-din-ee-um) undulatum Saunders & Dodge 1984. The image shows a cell in left lateral view. The cell is laterally compressed. The cingulum is near the anterior end of the cell. There are no plastids visible, however a reddish food particle is visible. The cell is thecate. The nucleus is in the posterior of the cell.
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Sabulodinium undulatum Saunders et Dodge 1984
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Sabulodinium undulatum Saunders et Dodge 1984
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Sabulodinium undulatum Saunders et Dodge 1984
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Stylodinium (style-owe-din-ee-um) is a rather unusual dinoflagellate, in which one phase of the life history is as a stalked and unflagellated cell - as here. Other forms include cysts, flagellates and heliozoan like organisms. The dinoflagellate nucleus with its condensed chromosomes is seen upper right. The circular structure is /are starch deposits around a pyrenoid. Probably related to Pfiesteria, a genus gaining (undue?) significance for its potential as a source of fish killer. Differential interference contrast.
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Stylodinium littorale motile cells are oval from the dorsal side. Length 12 - 20 microns, width 9 15 microns. Non-motile cells are a similar shape, surrounded by a hyaline layer, attached to the substrate by a colourless stalk, approximately 15 microns long and 3 microns wide, from the apex. On the motile cell, cingulum begins approximately 0.5 of the cell length from the apex, in the centre of the cell, descending across the dorsal side, not continuing onto the ventral side. Cytoplasm full of small yellow-green plastids. Colourless globules also present. Pyrenoid (2 3 microns) present in the centre of the cell. Nucleus in the hypocone, 3 4 microns wide. Motile cell very fast swimming.
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Stylodinium littorale Horiguchi et Chihara 1983
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Stylodinium littorale Horiguchi et Chihara 1983
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Stylodinium littorale Horiguchi et Chihara 1983
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Peridinium divergens.
