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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium rostratum
Ehrenberg ex Ralfs 1848

Closterium rostratum Species: Cell body medium in size, slightly curved, central region spindle-shaped, both side convex, both termini slightly swelled, with slanted edges (cf. C. ralfsii), 190-(320-400)-530 μm long, 18-(29-33) μm wide, L/W=11-16; cell wall striated (10 lines within 10 μm), brownish in color; chloroplasts with 3 laminae, 3-5 pyrenoids in each semicell (Illustrations of The Japanese Fresh-water Algae, 1977).


Closterium rostratum Ehrenberg, cell body μm long, μm wide, L/W=, x 400, x 640, Shibakusadaira (marsh), Zao mountain, Shichigashuku town, Miyagi Pref., Japan, August 17, 2007 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium rostratum Closterium rostratum Closterium rostratum Closterium rostratum
Cell body μm long, μm wide, L/W=, x 400, x 640
Closterium rostratum Closterium rostratum Closterium rostratum

Images of collecting locality: Shibakusadaira (marsh), Zao mountain, Shichigashuku town, Miyagi Pref., Japan, August 17, 2007 by Y. Tsukii


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