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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, after culturing with KCM & Hyponex for several moths, cell body 175 μm long, 11 μm wide, L/W=15.9, x 640, Omotsubo marsh (omotubo marsh, Suzuran-no-sono), Tetta-cho, Okayama Pref., Japan, November 22, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium toxon Closterium toxon

Closterium toxon W. West, cell body 207 μm long, 10.5 μm wide, L/W=19.7, x 640, Omotsubo marsh (omotubo marsh, Suzuran-no-sono), Tetta-cho, Okayama Pref., Japan, November 22, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium toxon Closterium toxon Closterium toxon Closterium toxon

C. toxon W. West: Cell body slightly curved, 163-(190-350) μm long, 8-(8.4-13)-20 μm wide, L/W = 25-33; both termini broadly rounded (nearly truncated); cell wall transparent, smooth; 5-7 pyrenoids arranged in a single line (Illustrations of The Japanese Fresh-water Algae, 1977).

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