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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium intermedium
Ralfs var. intermedium

Closterium intermedium Species [var. intermedium]: Cell body slightly curved, central region not swelled(inner side slightly concave), both ends broadly truncated with slanted edges, 76-(200-300)-470 μm long, 14-(17-22)-25 μm wide, L/W=6-15; cell wall brownish in color, with bands and lined (6-10 lines within 10 μm)
[var. hibernicum]: Cell body straight at central region, 200-(350)-384 μm long, 14-(26) μm wide, L/W=; (Illustrations of The Japanese Fresh-water Algae, 1977).

Closterium intermedium var. hibernicum W. et G.S. West, cell body 330 μm long, 24 μm wide, L/W=, x 200, x 400, x 640, wetland at Ichinose-enchi, Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 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 intermedium Closterium intermedium Closterium intermedium Closterium intermedium Closterium intermedium

Images of collecting locality: a wetland at Ichinose-enchi, Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii

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