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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium nematodes
Joshua var. proboscideum Turner

Closterium nematodes 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 nematodes Joshua var. proboscideum Turner, cell body μm long, μm wide, L/W=, x 640, Hanadate South wetland, Chokai mountain, Yuri-Honjo city, Akita Pref., Japan, September 29, 2008 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 nematodes Closterium nematodes Closterium nematodes Closterium nematodes Closterium nematodes Closterium nematodes

Images of collecting locality: No.1, Hanadate South wetland, Chokai mountain, Yuri-Honjo city, Akita Pref., Japan, September 29, 2008 by Y. Tsukii

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