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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium praelongum
Brébisson var. brevius Nordstedt

Closterium praelongum Species [var. praelongum]: Cell body 380-885 μm long, 11-26 μm, L/W = 22-24; slightly curved but straight at the center, tapered at both ends; curveture reversed at both ends, cell wall finely striated.
[var. brevius Nordstedt ]: Cell body shorter than v. praelongum, 198-360 μm long, 13-24 μm, L/W = 10-22.
[var. porosum (Gutwinski) Krieger ]: Cell body 120-557 μm long, 18-24 μm, L/W = 10-22; cellwall finely dotted, (Illustrations of the Japanese Fresh-Water Algae, 1977).


Closterium praelongum Brébisson var. brevius Nordstedt, cell body 266 μm long, 13 μm wide, L/W=20.5, x 400, x 640, rice field, Sano (near Minami-kamishiro railway station), Hakuba village, Nagano Pref., Japan, October 3, 2004 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


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