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 (Syn. Chlamydocapsa sp. ?),
cell body μm long, μm wide, L/W=,
x 640, Kareki-numa marsh, Nikko city (formerly Fujiwara town), Tochigi Pref., Japan, August 2, 2008, collected by Eizaburo Tsukii, photo by Y. Tsukii
94 μm; x 640