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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium pronum

Closterium pronum 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
Species: Cell body elongated spindle-shaped, μm long, μm wide, L/W=; cell wall transparent, smooth; chloroplasts with 3-6 pyrenoids


Closterium pronum or C. acutum ?, cell body 138 μm long, 3 μm wide, L/W=46.0, x 640, No.11, a marsh pond at Sensho-ga-hara, near Akita-komagadake (mountain), Shizukuishi town, Iwate Pref., Japan, August 6, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium pronum

Closterium pronum or C. acutum ?, cell body 320 μm long, 7 μm wide, L/W=45.7, x 200, x 400, x 640, No.11, a marsh pond at Sensho-ga-hara, near Akita-komagadake (mountain), Shizukuishi town, Iwate Pref., Japan, August 6, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium aciculare Closterium aciculare Closterium aciculare

Images of collecting locality: No.11, a marsh pond at Sensho-ga-hara, near Akita-komagadake (mountain), Shizukuishi town, Iwate Pref., Japan, August 6, 2007 by Y. Tsukii


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