Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
Trichome straight, without constriction at cell-cell junction, 15-20 μm wide;
cell body short, 3-5 μm long, L/W=1/6-1/3;
granules present along septum; terminal cells semielliptical, with thickened cell wall
(Illustrations of the Japanese Fresh-water Algae, 1977).
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