Family:
(Illustrations of The Japanese Fresh-water Algae, 1977).
Genus:
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:
Tetracystis sp. (or Gloeocystis ?),
cell body μm long, μm wide,
x 640, Central Park, Tsukuba city, Ibaraki Pref., Japan, July 2002 by Y. Tsukii
31 μm
63 μm
94 μm; x 640