Species: Cells bright blue-green, sometimes coarsely granulated,
8-32 μm in diam. (without sheath), sheaths 2-6 μm in thickness
(Photomicrographs of the Freshwater Algae, vol. 3, 1985).
Chroococcus turgidus (Kützing) Nägeli var. thermalis Rabenhorst,
cell body 18 μm long, 11 μm wide,
x 640, near Nan-ko (lake), Shirakawa city, Fukushima Pref., Japan, August 2003, by Y. Tsukii
94 μm; x 640