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Gamophyceae: Zygnematales

 Spirogyra setiformis
(Roth) Kützing

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: Vegetative cells 140-320 μm long, 90-115 μm diam., 4 (or 3 or 5) chloroplasts making 0.5-4 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spirogyra setiformis (Roth) Kützing ??, cell body μm long, 110 μm wide, 4 band-form chloroplasts making 1.5 turns, x 640, Tama river, Chofu city, Tokyo, Japan, February 24, 2004 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 setiformis Spirogyra setiformis Spirogyra setiformis Spirogyra setiformis Spirogyra setiformis

Spirogyra Spiryogyra margaritata Wollny: Vegetative cells 150-400 μm long, 100-120 μm diam., 13-15 chloroplasts making 0.25-0.5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra ellipsospora Transeau: Vegetative cells 125-500 μm long, 125-150 μm diam., 3-8 chloroplasts making 0.4-5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

* Spiryogyra setiformis (Roth) Kützing: Vegetative cells 140-320 μm long, 90-115 μm diam., 4 (or 3 or 5) chloroplasts making 0.5-4 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra yunnanensis Li: Vegetative cells 185-292 μm long, 92-110 μm diam., 6-8 chloroplasts making 2-4 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra minuticrassoidea Yamagishi: Vegetative cells (75-) 140-396 μm long, (78-) 102-120 μm diam., 6-7 chloroplasts making 0.5-2 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra crassa Kützing: Vegetative cells (110-) 126-300 μm long, (125-) 140-165 μm diam., 6-12 chloroplasts making 0.5-1 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra oblata Jao: Vegetative cells 98-226 μm long, 105-117 μm diam., 6-10 chloroplasts making 0.5-1.5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra peipingensis Jao: Vegetative cells 105-332 μm long, 113-125 μm diam., 5-6 chloroplasts making 0.5-1.5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

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