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Gamophyceae: Zygnematales: Zygnemataceae

 Spirogyra sp.

Spirogyra Genus: Filament without branching; cell body cylindrical; one or several chloroplasts band-shaped, spirally arranged within the cell, pyrenoids present; septum with or without folded structure (Guide book to the "Photomicrographs of the Freshwater Algae", 1998). About 300 species (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Spirogyra sp. Link 1820, cell body 88-102 μm long, 28 μm wide, a single band-form chloroplast making 3 turns in each cell, x 400, x 640, wetland at Ichinose-enchi, Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Spirogyra Spirogyra

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