Genus: Colonies spherical or aggregates in shape; sheath conspicuous; cell body spherical in shape;
chloroplasts cup-shaped or plate-like (Illustrations of the Japanese fresh-water algae, 1977).
Gloeocystis gigas (or Chlamydocapsa sp. ?),
cell body ellipsoidal (14 μm long, 10 μm wide) or spherical (18 μm in diam.),
x 640, Omine-numa (pond/marsh), Tsukiyono town, Gunma Pref., Japan, September 2003 by Y. Tsukii
94 μm; x 640