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Description of Komma

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Cryptomonad flagellates, cells are comma-shaped, or acuminate, with a rounded anterior end, tapering to a pointed or acutely rounded posterior. A furrow is lacking but a tubular gullet extends posteriorly from the base of the vestibulum. The periplast consists of relatively small internal and surface hexagonal plates, with the surface plates being crystalline in composition and occasionally, rosulate, heptagonal scales lie on the surface of these plates. The periplastidial compartment contains a single blue-green chloroplast with a central pyrenoid lacking traversing thylakoids and projecting from the chloroplast, the chloroplast occupying a dorso-central position of the cell, and a nucleomorph situated at the level of the pyrenoid. The chloroplast contains C-phycocyanin 645. Freshwater.
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