Species: Cell body 31-33.6 μm long, 27-28 μm wide, isthmus 7-8 μm wide;
semicells hexagonal in shape, central width larger than basal & apical ones;
apex flat with slightly swelled corners; apical view more or less diamond-shaped, with central bulges on both sides
(Illustrations of The Japanese Fresh-water Algae, 1977).
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