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Gamophyceae: Zygnematales: Zygnemataceae

 Zygnema sp.

Zygnema Genus: Filament without branching; cell body cylindrical; two chloroplasts star-shaped; tubes formed (or cell body fused) at conjugation; zygospore spherical or broad ellipsoidal formed within female gametangium (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:

Zygnema Agardh, cell body 51-58 μm long, 31 μm wide, L/W=1.6-1.9, gelatinous coats 2.5 μm in thickness, x 640, Nakano-numa park, Nakano, Oura town, Gunma Pref., Japan, February 18, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Zygnema Zygnema

Images of collecting locality: Nakano-numa park, Nakano, Oura town, Gunma Pref., Japan, February 18, 2006 by Y. Tsukii

Zygnema excompressum Transeau: vegetative cells 32-80 μm long, 23-26 μm diam., 2 chloroplasts in each cell

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