Genus: Subaerial algae; cell body without gelatinous coat; a single chloroplast cup-shaped with a pyrenoid
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
Chlorococcum ?,
cell body μm long, μm wide,
x 640, Tama river, Tokyo, Japan, March or May, 2004 by Y. Tsukii
31 μm
63 μm
94 μm; x 640