Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Trichome nearly straight, slightly tapered toward both ends, without constriction at septum, 4-6 μm wide;
cell body 2.5-4 μm long, granules present along septum; pseudovacuoles also present;
terminal cells variable in shape, sometimes form conical-shaped calyptra, or rounded
(Illustrations of The Japanese Fresh-water Algae, 1977).
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