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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., vegetative cells 250 μm long, 44 μm diam., 3 band-form chloroplasts making 2 turns in each cell, x 100, x 200, x 400, x 640, Torinome, Nasu-shiobara city (formerly Kuroiso city), Tochigi Pref., Japan, 2001 by Y. Tsukii
scale 100 μm scale 200 μm scale 300 μm; x 200 : scale 50 μm scale 100 μm scale 150 μm; x 400
Spirogyra Spirogyra
x 400
Spirogyra Spirogyra Spirogyra Spirogyra
x 640 : scale 31 μm scale 63 μm scale 94 μm; x 640
Spirogyra Spirogyra Spirogyra Spirogyra

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