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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., cell body 240 μm long, 70 μm wide, L/W=, a single band-form chloroplast making 5.5 turns in a cell, x 640, Tamogi-ike (water reservoir), Nabekura highland, Iiyama city, Nagano Pref., October 19, 2008, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Spirogyra Spirogyra Spirogyra Spirogyra Spirogyra

Images of collecting locality: a wetland near Tamogi-ike (water reservoir), Nabekura highland, Iiyama city, Nagano Pref., October 19, 2008, by Y. Tsukii

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