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Gamophyceae: Zygnematales: Desmidiaceae or Closteriaceae

Closterium kuetzingii
Brébisson var. kuetzingii

Closterium kuetzingii 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).
Subgenus [Euclosterium]: Cell body curved.
Species: Cell body moderate in size, elongate, 270-512 μm long, 13-22 μm wide ( L/W= 18-30); slightly curved at both ends, spindle-shaped at middle; both termini slighlty rounded; cell wall transparent or brownish with thin lines (8-11 lines/10 μm wide); chloroplasts composed of 5 lamellae; 4-6 pyrenoids in each half-cell (Photomicrographs of the Fresh-water Algae, vol. 4, 1985).
Similar species -->> C. ralfsii; C. setaceum;


Closterium kuetzingii Brébisson, cell body 290 μm long, 15 μm wide, L/W=19.3, x 400, x 640, Yacho-no-mori marsh (near road sign No. 4), Sukawa highland, Kurikoma mountain, Higashi-naruse village, Akita Pref., Japan, July 24, 2005 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 kuetzingii Closterium kuetzingii
Cell body 235 μm long, 15 μm wide, L/W=15.7, x 400, x 640
Closterium kuetzingii Closterium kuetzingii Closterium kuetzingii Closterium kuetzingii


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