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Dinophyceae: Gymnodiniales: Gymnodiniaceae
Dinoflagellida: Diniferina: Gymnodiniidae

 Gyrodinium sp.

Gyrodinium Order: Cell body without theca (Illustrations of The Japanese Fresh-water Algae, 1977).
Family:
Genus:

Gyrodinium (or Katodinium vorticella ?), cell body 44 μm long, 38-44 μm wide, x 200?, x 400, x 640, Kurome river, Asaka city, Saitama Pref., Japan, November 1998 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Gyrodinium Gyrodinium Gyrodinium Gyrodinium Gyrodinium Gyrodinium Gyrodinium Gyrodinium

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