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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 24-28 μm long, 36-37 μm wide, gelatinous sheath about 6 μm in thickness, x 640, a small pond No. 10, Mida-ga-hara (bog/marsh), Gassan (mountain), Tsuruoka city (formerly Haguro town) & Shonai town (formerly Tachikawa town), Yamagata Pref., Japan, August 3, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Chroococcus Chroococcus

Images of collecting locality: No. 10, Mida-ga-hara (bog/marsh), Gassan (mountain), Tsuruoka city (formerly Haguro town) & Shonai town (formerly Tachikawa town), Yamagata Pref., Japan, August 3, 2006 by Y. Tsukii


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