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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium cynthia
De Notaris var. cynthia

Closterium cynthia Species [var. cynthia]: Cell body small, strongly curved, inner side concaved or straight at the centeral region, 73-180 μm long, 11-22 μm wide, L/W=8-10; cell wall brownish in color, finely striated (10-11 striae/10 μm); 3-5 pyrenoids in each semicell;
[var. jenneri]: Cell body small, inner side concaved or straight at the centeral region, 43-(64-98)-110 μm long, 7-(8-11)-18 μm wide, cell wall smooth, transparent or brownish in color (Illustrations of The Japanese Fresh-water Algae, 1977).
[var. curvatisssimum]: Strongly curved, central region nearly straight or slightly concave, tapered toward ends, both ends rounded, 88-137 μm long, 13-19 μm wide, L/W=6.5-9; cell wall lined (about 9 lines/10 μm); 5-6 pyrenoids in each semicell (Photomicrographs of the Freshwater Algae, vol.10, 1989).


Closterium cynthia De Notaris var. cynthia, cell body 105 μm long, 13.5 μm wide, L/W=7.8, x 640, Kareki-numa marsh, Nikko city (formerly Fujiwara town), Tochigi Pref., Japan, August 2, 2008, collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium cynthia Closterium cynthia

Images of collecting locality: Kareki-numa marsh, Nikko city (formerly Fujiwara town), Tochigi Pref., Japan, August 2, 2008 by Eizaburo Tsukii


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