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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium angustatum
Kützing var. angustatum f. angustatum

Closterium angustatum Genus: Cell body crescent in shape (long, curved, tapered at both ends); cross section rounded; cell wall smooth or with longitudinal lines, bands on the cell wall in some species; chloroplast laminae ridged and radially arranged, which makes cross section star-shaped; pyrenoids aligned or scattered (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:


Closterium angustatum Kützing var. angustatum f. angustatum, cell body μm long, μm wide, L/W=, x 200, x 400, x 640, a pond near the entrance of climbing route to Omine mountain, Minakami town, Gunma Pref., Japan, October 21, 2007 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 angustatum Closterium angustatum Closterium angustatum
x 640
Closterium angustatum Closterium angustatum Closterium angustatum Closterium angustatum Closterium angustatum
Cell body μm long, μm wide, L/W=, x 400, x 640
Closterium angustatum Closterium angustatum Closterium angustatum Closterium angustatum Closterium angustatum

Closterium angustatum Kützing var. angustatum f. angustatum, cell body μm long, μm wide, L/W=, x 200, x 400, x 640, a pond near the entrance of climbing route to Omine mountain, Minakami town, Gunma Pref., Japan, October 21, 2007 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 angustatum Closterium angustatum Closterium angustatum Closterium angustatum
x 640
Closterium angustatum Closterium angustatum Closterium angustatum Closterium angustatum Closterium angustatum

Images of collecting locality: a pond near the entrance of climbing route to Omine mountain, Minakami town, Gunma Pref., Japan, October 21, 2007 by Y. Tsukii


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