Species:
Colonies linear filaments consisting of 10-20 cells; cell body short cylindroid, both ends rounded,
15-20 μm long, 8-10 μm in diam.; cells separated each other;
a single chloroplast plate-like, with a pyrenoid (Illustrations of the Japanease Freshwater Algae, 1977).
The thickness of the gelatinous sheath variable; planktonic; cell body ellipsoidal or cylindrical with rounded ends,
25-35 μm long, 9-20 μm in diam.; cells scarcely adherent to each other or
equally separated on another; chloroplasts a single, plate-like forming a girdle, with a pyrenoid
(Photomicrographs of the Fresh-water Algae, vol. 3 (1985).
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