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 sp. ?,
cell body μm long, μm wide, L/W=,
x 640, water field near Takao bridge, near Takao-sakura park, Kitamoto city, Saitama Pref., April 17, 2005 by Y. Tsukii
94 μm; x 640