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Gamophyceae: Zygnematales

 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 122 μm long, 22 μm wide, a single band-form chloroplast making 4 turns in each cell, x 100, x 200, x 400, x 640, standing water under Akigase bridge, Akigase park, Saitama city, Saitama Pref., Japan, February 27, 2005 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
x 640
Spirogyra Spirogyra Spirogyra

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