image_list image_listE

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. nematodes ?), cell body 300 μm long, 25 μm wide, L/W=12.0, x 400, x 640, No.2, Nozomiko (Lake Nozomi), Myoko-kogen (Myoko highland), Iiyama city, Nagano Pref., Japan, April 26, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium rostratum Closterium rostratum Closterium rostratum Closterium rostratum
Cell body 230 μm long, 21 μm wide, L/W=11.0, x 400, x 640
Closterium rostratum Closterium rostratum Closterium rostratum
Cell body 245 μm long, 25 μm wide, L/W=9.8, x 400, x 640
Closterium rostratum Closterium rostratum Closterium rostratum Closterium rostratum
Cell body 280 μm long, 25 μm wide, L/W=11.2, x 400, x 640
Closterium rostratum Closterium rostratum Closterium rostratum Closterium rostratum
Cell body 255 μm long, 25 μm wide, L/W=10.2, x 400, x 640
Closterium rostratum Closterium rostratum

Images of collecting locality: No.2, Nozomiko (Lake Nozomi), Madarao highland, Iiyama city, Nagano Pref., Japan, April 26, 2007 by Y. Tsukii

Please click on images for viewing enlarged.
Copyright Protist Information Server