|  Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells   
(Illustrations of The Japanese Fresh-water Algae, 1977). Species: Trichome without constriction; cell body elongated, 3-7 μm long, 1.5-2 μm wide; 
(Illustrations of The Japanese Fresh-water Algae, 1977).
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