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Cyanophyceae: Chroococcales: Chroococcaceae

Chroococcus turgidus
(Kützing) Nägeli

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, cell body 27 μm long, 22 μm wide, L/W=1.2, gelatinous coats 5 μm in thickness, x 640, Yacho-no-mori marsh (near road sign No. 1), Sukawa highland, Kurikoma mountain, Higashi-naruse village, Akita Pref., Japan, July 24, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Chroococcus turgidus


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