Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Trichome straight or slightly curved, without constriction at cell-cell junction, 2-3 μm wide;
cell-body length nearly the same as its width (Illustrations of The Japanese Fresh-water Algae, 1977).
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