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Cyanophyceae: Chroococcales: Chroococcaceae

Chroococcus turgidus
var. maximus Nygaard

Chroococcus Species [ var. turgidus ]: 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).
Colony of 2-4 cells, covered with layered gelatinous sheath; cell body 8-32 μm in diam. (excluding sheath), 13-40 μm in diam. (including sheath).
[ var. maximus ]: Cell body 22-45 μm in diam. (excluding sheath, 5-10 μm in thickness)
[ var. thermalis]: Sheath present, but not layered (Illustrations of The Japanese Fresh-water Algae, 1977).


Chroococcus turgidus (Kützing) Nägeli var. maximus Nygaard, cell body 25 μm long, 14 μm wide, gelatinous sheath 4.5 μm in thickness, x 640, Mida-ga-hara (bog), Gassan (mountain), Haguro & Tachikawa town, Yamagata Pref., Japan, July 10, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Chroococcus turgidus
Cell body 31-35 μm long, 25 μm wide, gelatinous sheath 5.5 μm in thickness, x 640
Chroococcus turgidus


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