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

Gonatozygon brebissonii
de Bary

Gonatozygon Genus: Two chloroplasts plate-like or slightly spiralled; a nucleus centrally located between the chloroplasts; mostly unicells, filaments rare (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Cell body constricted near the both ends, (68-160)-288 μm long, (7-8)-10.8 μm wide, L/W = 10-16, cell wall densely granulated (Illustrations of The Japanese Fresh-water Algae, 1977).

Gonatozygon brebissonii de Bary, cell body μm long, 6 μm wide, L/W=, x 640, No.2, Near Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, October 12, 2008 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Gonatozygon brebissonii Gonatozygon brebissonii Gonatozygon brebissonii Gonatozygon brebissonii
Cell body μm long, μm wide, L/W=, x 400, x 640
Gonatozygon brebissonii Gonatozygon brebissonii Gonatozygon brebissonii

Images of collecting locality: No.2, Near Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, October 12, 2008 by Y. Tsukii

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