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Gamophyceae: Zygnematales: Zygnemataceae

 Spirogyra tenuissima
(Hassall) Kützing

Spirogyra tenuissima 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: Vegetative cells 66-198 μm long, 10-14 μm diam.; 1 chloroplast making 3.5-6 turns in each cell; conjugation scalariform, female gametangium swelled; zygospores elliptical (44-62 μm long, 20-28 μm wide) (Illustrations of The Japanese Fresh-water Algae, 1977).

Spirogyra tenuissima ?, cell body 280 μm long, 15 μm wide, a single band-form chloroplast making about 9 turns in each cell, septum folded, x 100, x 200, x 400, x 640, standing water near Murakuni ike (pond), Iwatsuki-bunka Park, Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, April 9, 2006 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 Spirogyra Spirogyra Spirogyra

Images of collecting locality: standing water near Murakuni ike (pond), Iwatsuki-bunka Park, Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, April 9, 2006 by Y. Tsukii

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