Genus: Subaerial algae; cell body without gelatinous coat; a single chloroplast cup-shaped with a pyrenoid
(Illustrations of The Japanese Fresh-water Algae, 1977).
cell body ellipsoidal, 10 μm long, 6.5 μm wide,
a pyrenoid 2.5 μm in diam., located at mid-lateral side of the cell,
x 640, Yakusho-ji-ike Park, Kosugi town, Toyama Pref., Japan, September 2002, by Y. Tsukii
94 μm; x 640
Zoospores (?) getting out from old cell wall