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Gamophyceae: Zygnematales: Desmidiaceae
(Chlorophyceae: Zygnematales: Gonatozygaceae or Mesotaeniaceae)

 Mesotaenium macrococcum
(Kützing) Roy et Bisset

Mesotaenium macrococcum Genus: Cell body ellipsoidal or short cylindrical; chloroplasts plate-like.
Species: Cell body cylindrical, 22-38 μm long, 11-20 μm wide, both ends rounded, a single plate-like chloroplast present, margins dented (Illustrations of The Japanese Fresh-water Algae, 1977) .

Mesotaenium macrococcum (Kützing) Roy et Bisset ?, cell body μm long, μm wide, L/W=, x 640, No.3, Ayamedaira, Oze-ga-hara (Oze marsh), Katashina village, Gunma Pref., Japan, October 6, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Mesotaenium macrococcum Mesotaenium macrococcum Mesotaenium macrococcum

Images of collecting locality: No.3, Ayamedaira, Oze-ga-hara (Oze marsh), Katashina village, Gunma Pref., Japan, October 6, 2007 by Y. Tsukii

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