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Gamophyceae: Zygnematales: Zygnemataceae

 Spirogyra singularis
Nordstedt

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 singularis Nordstedt, cell body 163 μm long, 35 μm wide, a single band-form chloroplast making 4 turns in each cell, x 640, a pond at Iwatsuki Park, Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, April 9, 2006 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 singularis Spirogyra singularis
Spirogyra singularis Spirogyra singularis
Spirogyra singularis Spirogyra singularis Spirogyra singularis

Images of collecting locality: a pond at Iwatsuki Park, Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, April 9, 2006 by Y. Tsukii

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