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. or Gloeocystis ?,
cell body spherical-ellipsoidal, 9-10 μm long, 7-9 μm wide,
each cell embedded within a distinct gelatinous sheath, which retained after several cell division,
x 400, x 640, Shinobazu-ike (pond), Ueno, Taito-ku, Tokyo, Japan, March 2001 by Y. Tsukii
150 μm; x 400 :
94 μm; x 640