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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium archerianum
Cleve

Closterium archerianum Species: Cell body strongly curved, gradually tapered toward ends, both ends rounded, 175-(225-300) μm long, 16-(22-25)-30 μm wide, L/W = 10-12; cell wall brownish in color, striated (5-6/10 μm); chloroplasts with 3-4 laminae, 5-7 pyrenoids in each semicell (Illustrations of The Japanese Fresh-water Algae, 1977).

Closterium archerianum Cleve ?, cell body 280 μm long, 25 μm wide, L/W=11.2, about 6.5 striae within 10 μm, x 400, x 640, Iroha-numa (marsh), Zao mountain, Yamagata city, Yamagata Pref., Japan, July 9, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium Closterium Closterium Closterium

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