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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

 Closterium toxon
W. West

Closterium toxon Species: Cell body medium in size, slightly curved, centrally straight, gradually tapered toward ends, both ends truncated with rounded corners, 163-(190-350) μm long, 8-(8.4-13)-20 μm wide, L/W = 25-32; cell wall smooth, bands absent; chloroplasts with 5-7 pyrenoids (Illustrations of The Japanese Fresh-water Algae, 1977).

Closterium toxon W. West, cell body 227 μm long, 13.5 μm wide, L/W=16.8, x 400, x 640, Kareki-numa marsh, Nikko city (formerly Fujiwara town), Tochigi Pref., Japan, September 24, 2008 collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium toxon Closterium toxon Closterium toxon

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