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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 164 μm long, 4.5 μm wide, L/W=36.4, x 640, Tanohara Natural Park, Ontake highland, Otaki town, Nagano Pref., Japan, June 26, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium pronum Closterium pronum
Cell body 170 μm long, 5 μm wide, L/W=34.0, x 640
Closterium pronum

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