Genus: Subaerial algae; cell body without gelatinous coat; a single chloroplast cup-shaped with a pyrenoid
(Illustrations of The Japanese Fresh-water Algae, 1977).
Chlorococcum sp. ?,
small cells 5 μm long, 2.5 μm wide, L/W=,
large cells up to 22 ╝m in diam.,
x 400, x 640, water reservoir, Kumakubo, Nasu-shiobara city (formerly Kuroiso city), Tochigi Pref., Japan, December, 2005, collected by Eizaburo Tsukii, photo by Y. Tsukii
94 μm; x 640