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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 sp., vegetative cells μm long, 44 μm diam., a slight constriction at septum, 2 chloroplasts in each cell, x 100, x 200, x 400, x 640, Tsukuba city, Ibaraki Pref., Japan, October 2000, collected by N. Kinoshita, photo by Y. Tsukii
Zygnema Zygnema
scale 50 μm scale 100 μm scale 150 μm; x 400
Zygnema Zygnema
scale 31 μm scale 63 μm scale 94 μm; x 640
Zygnema Zygnema Zygnema

Before and after cell division, cell body 31, 62 μm long, 44 μm wide, x 400, Tsukuba city, Ibaraki Pref., October 2000, collected by N. Kinoshita, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Zygnema Zygnema Zygnema Zygnema Zygnema

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

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