Gamophyceae: 
Zygnematales: Desmidiaceae or Closteriaceae
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= 
; 
 
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Closterium pronum  , 
cell body 215 μm long, 7 μm wide, 
x 400, x 640, No. 4-2, Midagahara (bog/marsh), Tate-yama (Moutain), Tateyama town, Toyama Pref., Japan, August 23, 2006, by Y. Tsukii
 31 μm
 63 μm
 94 μm; x 640
Cell body 240 μm long, 7 μm wide, x 400, x 640
Closterium pronum ,  
cell body 136 μm long, 4.5 μm wide, L/W=30, 
x 640, Midagahara (bog/marsh), Tate-yama (Moutain), Tateyama town, Toyama Pref., Japan, August 23, 2006, by Y. Tsukii
 31 μm
 63 μm
 94 μm; x 640
Images of collecting locality: 
No. 4, Midagahara (bog/marsh), Tate-yama (Moutain), Tateyama town, Toyama Pref., Japan, August 23, 2006, by Y. Tsukii
Please click on images for viewing enlarged.
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