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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium sinense
Lütkemüller

Closterium sinense 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: Cell body slightly curved, inner side concave, both ends broadly rounded, 140-(160-192) μm long, 14-(15-19.6) μm wide, L/W=8-12; cell wall smooth, transparent (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> C. cornu (L/W=16-17); C. littorale (L/W=10-12);

Closterium sinense Lütkemüller (or C. littorale Gay ?), cell body slightly curved 130-150 μm long, 14 μm wide, L/W=9.3-10.7, cell wall smooth, 3-4 (or 5) pyrenoids in semicells, x 400, x 640, Higashi-Urawa (Minuma-tanbo), Saitama Pref., Japan, June 2001 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 sinense Closterium sinense Closterium sinense Closterium sinense Closterium sinense
Closterium sinense Closterium sinense Closterium sinense

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