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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium kuetzingii
Brébisson var. kuetzingii

Closterium kuetzingii Species: Cell body quickly attenuated toward both ends (cf. C. ralfsii), each extended part shorter than spindle-shaped part at middle (cf. C. setaceum), both termini slighlty curved, rounded, 270-690 μm long, 14-27 μm wide ( L/W= 18-20); cell wall transparent or brownish with thin lines (8-10 lines/10 μm wide); chloroplasts composed of 5 lamellae; 4-6 pyrenoids in each half-cell (Illustrations of The Japanese Fresh-water Algae, 1977).
270-512 μm long, 13-22 μm wide ( L/W= 18-30); 8-11 lines/10 μm wide (Photomicrographs of the Fresh-water Algae, vol. 4, 1985).
Similar species -->> C. ralfsii; C. setaceum;

Closterium kuetzingii Brébisson, cell body 560 μm long, 24 μm wide, L/W=23.3, striae visible (7-8 lines within 10 μm), x 200, x 400, x 640, Numa-no-hara marsh (Genseikaen), Madarao highland (Niigata & Nagano Pref.), Myoko village, Niigata Pref., Japan, May 15, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium kuetzingii Closterium kuetzingii Closterium kuetzingii
Closterium kuetzingii Closterium kuetzingii Closterium kuetzingii Closterium kuetzingii
Cell body 340 μm long, 14 μm wide, L/W=24.3, striae invisible, x 200, x 400, x 640
Closterium kuetzingii Closterium kuetzingii Closterium kuetzingii
Cell body 303 μm long, 14 μm wide, L/W=21.6, striae invisible, x 400, x 640
Closterium ralfsii Closterium ralfsii Closterium ralfsii Closterium ralfsii

Closterium setaceum Ehrenberg var. setaceum f. setaceum: Cell body small in size, elongate, L/W= 30-42, 252-528 μm long, 6-16 μm wide; both termini slightly curved, spindle-shaped at middle; cell wall transparent or brownish with thin lines (8-13 lines/10 μm wide); 2-3 pyrenoids in each half-cell (Photomicrographs of the Fresh-water Algae, vol. 6, 1997).

* Closterium kuetzingii BrébissonBrébisson var. kuetzingii: Cell body moderate in size, elongate, L/W= 18-30, 270-512 μm long, 13-22 μm wide; both termini slightly curved, spindle-shaped at middle; cell wall transparent or brownish with thin lines (8-11 lines/10 μm wide); chloroplasts composed of 5 lamellae; 4-6 pyrenoids in each half-cell (Photomicrographs of the Fresh-water Algae, vol. 4, 1985).

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