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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium pronum

Closterium pronum Genus: Cell body crescent in shape (long, curved, tapered at both ends); cross section rounded; cell wall smooth or with longitudinal lines, bands on the cell wall in some species; chloroplast laminae ridged and radially arranged, which makes cross section star-shaped; pyrenoids aligned or scattered
Species: Cell body elongated spindle-shaped, μm long, μm wide, L/W= ;

Closterium pronum , cell body 153 μm long, 4 μm wide, L/W=38.3, x 400, x 640, Sayama Natural Park, Higashi-Murayama city, Tokyo, Japan, December 2001 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Closterium gracile Closterium gracile Closterium gracile
Cell body 160 μm long, 4 μm wide, L/W=40, x 400, x 640, x 640, by Y. Tsukii
Closterium gracile Closterium gracile Closterium gracile
Cell body 196 μm long, 7 μm wide, L/W=28, x 400, x 640, by Y. Tsukii
Closterium gracile Closterium gracile
Cell body 185 μm long, 4.5 μm wide, L/W=41.1, x 640, by Y. Tsukii
Closterium gracile Closterium gracile Closterium gracile Closterium gracile

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