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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 or C. ralfsii ?, cell body 330 μm long, 30 μm wide, L/W= 11, x 400, x 640, Vermont-Maine U.S.A., August 7-13, 1999, 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 Closterium Closterium Closterium
Closterium Closterium Closterium Closterium
Closterium Closterium Closterium Closterium


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