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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 135 μm long, 19 μm wide, L/W=7.1, a single band-form chloroplasts making 5 turns in each cell, x 400, x 640, Lake Kizaki, Omachi city, Nagano Pref., Japan, November 23, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Spirogyra Spirogyra

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