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Chlorophyceae: Chlorococcales: Oocystaceae

 Trochiscia sp.

Trochiscia Genus: Unicells; cell body spherical in shape; cell wall warty or wrinkled (Illustrations of The Japanese Fresh-water Algae, 1977).
Cell wall with warts or a network of ridges or lines (Dillard, Common Freshwater Algae of the United States, J. Cramer 1999).
Species:

Trochiscia sp., cell body spherical, 10-12 μm in diam., cellwall warts about 2 μm in thickness, gelatinous coats 3 μm in thickness, x 640, Yoshigadaira (or Yoshigataira) marsh, Shirane mountain, Kusatsu town, Gunma Pref., Japan, June 5, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Trochiscia Trochiscia

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