Species: Cell body medium in size, broadly elliptical, 40-(45-48)-53 μm long,
32-(37-40)-44 μm wide, isthmus 14-(16-18)-21 μm wide;
semicells semicircular in shape, basal corners right-angled, 6 lines of apically-truncated warts (about 14 warts in each line)
present along their margins; 2 lines of warts or granules (upper 3 & lower 4) present at the center of the semicells
(Illustrations of The Japanese Fresh-water Algae, 1977).
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