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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium navicula
(Brébisson) Lütkemüller

Closterium navicula Species: Cell body not curved, spindle or boat in shape; 24-(35-84)-93 μm long, 8-(11-20)-22 μm wide; L/W = 3-4; a single chloroplast and 1 or 2 pyrenoids in each semicell (Illustrations of The Japanese Fresh-water Algae, 1977).

Closterium navicula (Brébisson) Lütkemüller, cell body 33 μm long, 11 μm wide, x 640, Ohnuma (a pond in Ohnuma enchi), Nasu-shiobara city (formerly Shiobara town), Tochigi Pref., Japan, May 5, 2006, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium navicula Closterium navicula

Images of collecting locality: Hotarunosato (firefly hometown), Oyama general park, Oyama city, Tochigi Pref., Japan, March 30, 2006 by Y. Tsukii

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