: Ulotrichales: Ulotrichaceae
; sexual reproduction by
Genus: Without gelatinous sheath; filaments consist of many cells;
formed at one end (Illustrations of The Japanese Fresh-water Algae, 1977).
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?, cell body
μm wide, x 640, Usui river, near Yachiyo bridge, Takasaki city, Gunma Pref., Japan, April 11, 2004 by Y. Tsukii
150 μm; x 400 :
94 μm; x 640
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