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Collected from Cumloden Swamp on October 7, 2002.
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Image of the colonial diatom Thalassionema from the waters off Martha's Vineyard. First image by the inaugural protistology workshop team - not bad for starters - eh?
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Striatella (stree-at-ell-a) is a pennate diatom, this cell being seen from the sidle (girdle view). There are numerous girdle bands wrapping around the cell, plastids and nuclei have condensed in the centre of the cell and there are fine cytoplasmic strands leading to the surrounding skeleton or frustule. Phase contrast.
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of the colonial diatom, Asterionella formosa (Hassall, 1850). The linear frustules have expanded ends. The frustules of the colony are connected by gelatinous cushions at the larger of their two ends in a radial array all in more or less the same plane The yellow chloroplasts are seen here. Blooms of this diatom may impart a disagreeable fishy taste to fresh water. Collected from freshwater pond near Boise, Idaho January 2003. Phase contrast illumination.
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