Merismopedia (mer-is-mo-pea-dee-a) is a blue-green alga or cyanobacterium. The genus is distinguished by the square-packed pattern of the coccoid cells. It is common in sediments, but the number of cells which occur in a colony may vary from only a few to thousands. As a cyanobacterium, the photosynthetic pigments are located throughout the cytoplasm. These can be seen if the cells are illuminated with ultra-violet light and then the distribution of the pigment detected by the resulting fluorescence. Fluorescence microscopy. This picture was taken by David Patterson, Linda Amaral Zettler and Virginia Edgcomb of material from the salt marsh at Little Sippewissett (Massachusetts, USA) in Autumn, 2000 and in Spring and summer, 2001. Image copyright: D. J. Patterson, L. Amaral-Zettler and V. Edgcomb, image used under license to MBL (micro*scope).
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From the collection
Little Sippewissett salt marsh, Massachusetts, USA
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