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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 , cell body 300 μm long, 6.5 μm wide, L/W=, x 200, x 400, x 640, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, May 8, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium pronum Closterium pronum Closterium pronum

Closterium pronum , cell body (left) 136 μm long, 4 μm wide, L/W=34, x 640, Karakemi marsh, Yasaka village, Nagano Pref., Japan, November 23, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Closterium gracile Closterium gracile

Images of collecting locality: Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, May 8, 2006 by Y. Tsukii


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