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Chlorophyta: Gamophyceae: Zygnematales: Zygnemataceae

Spirogyra sp.

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).

Spirogyra sp., tape No. 0327, time code 0000, cell body μm long, 34 μm wide, 4 band-form chloroplasts making 2-3 turns in each cell, x 400, x 640, Kanayama green park, Kiyose city, Tokyo, Japan, August 2001 by Y. Tsukii

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