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 (or Gloeocapsa ?),
cell body 15 μm long, 9 μm wide,
x 640, a small pond near Yamaguchi university, Yamaguchi city, Yamaguchi Pref., November 21, 2004, by Y. Tsukii
94 μm; x 640