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Gamophyceae: Desmidales: Mesotaeniaceae
(Charophyceae: Zygnematales: Mesotaeniaceae)

 Cylindrocystis brebissonii
Meneghini var. brebissonii

Cylindrocystis Genus: Two chloroplasts with axis and laminae structure; axis short, laminae also short making the chloroplasts star-shaped
Species: Cell body cylindrical, large, 20-87 μm long, 11-35 μm wide (Photomicrographs of the Fresh-water Algae, 1984).
[var. brebissonii]: Cell body cylindridal with both round ends, 30-87 μm long, 14-35 μm wide, L/W=2-4; chloroplasts star-shaped, with a single pyrenoid. (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar genus -->> Zygnema; Penium; Mesotaenium;

Cylindrocystis brebissonii Meneghini var. brebisonii, cell body 55 μm long, 23 μm wide, L/W=2.4, x 640, No.1, Shirakaba-Yachi, Komado marsh (No.6), Showa village and Tajima town, Fukushima Pref., Japan, May 21, 2007, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cylindrocystis brebissonii Cylindrocystis brebissonii
Cell body 67 μm long, 23 μm wide, L/W=2.9, x 640
Cylindrocystis brebissonii Cylindrocystis brebissonii

Images of collecting locality: No.1, Shirakaba-Yachi, Komado marsh (No.6), Showa village and Tajima town, Fukushima Pref., Japan, May 21, 2007, by Y. Tsukii

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