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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium acutum
var. variabile (Lemmermann) Krieger

Closterium 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 [var. variabile]: Cell body strongly curved, nearly semicircular, 43-140-(150) μm long, 2.5-5-(6) μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).


Closterium acutum var. variabile (Lemmermann) Krieger, cell body 122 μm long, 4 μm wide, L/W = 30.5, x 400, x 640, Yamagata Pref., Japan, 1999, 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 Closterium Closterium


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