|  Genus: 
Branching; terminal cells never form rhizoid; 
attached substrates by a single cell; no akinete 
(Illustrations of The Japanese Fresh-water Algae, 1977). Species: Cell body elongated cylindrical, 45-60(-100) μm in diam., L/W=8-15
chloroplasts reticulated, with many pyrenoids; rhizoids branching and spreading 
(Illustrations of Japanese freshwater algae, 1977).@@
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