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Species: Cell body large, slightly curved, gradually tapered toward ends, both ends broadly truncated with rounded
corners, 250-(430-736) μm long, 30-(42-48)-58 μm wide,
L/W=10-11; cell wall dotted, yellowish in color, especially at both ends; 5-7 pyrenoids in each semicell
(Illustrations of The Japanese Fresh-water Algae, 1977).
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50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
