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Gamophyceae: Zygnematales: Zygnemataceae

 Spirogyra distenta
Transeau

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 (50-) 58-165 μm long, (43-) 48-58 μm diam., 2 chloroplasts making 2-3.5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spirogyra distenta Transeau ??, cell body μm long, 49 μm wide, 2 band-form chloroplasts making 3 turns in each cell, x 100, x 200, x 400, x 640, a lotus pond at Ikoi-no-mori park, Fuchu city, Tokyo, Japan, March 10, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Spirogyra distenta Spirogyra distenta Spirogyra distenta Spirogyra distenta Spirogyra distenta Spirogyra distenta

* Spiryogyra distenta Transeau: Vegetative cells (50-) 58-165 μm long, (43-) 48-58 μm diam., 2 chloroplasts making 2-3.5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

* Spiryogyra occidentalis (Transeau) Czurda: Vegetative cells 125-300 μm long, 40-50 μm diam., 1-2 or 3 chloroplasts making 1-2.5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra porticalis Müller Cleve: Vegetative cells 66-200 μm long, 40-50 μm diam., 1 chloroplast making 3-5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra ternata Ripart: Vegetative cells (48-) 85-330 μm long, (55-) 60-85 μm diam., 3-4 chloroplasts making 1-3 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra pulchrifigurata Jao: Vegetative cells 64-192 μm long, 42-58 μm diam., 3-4 chloroplasts making 1.5-4 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra majuscula Kützing: Vegetative cells 68-190 μm long, 50-80 μm diam., 5-8 chloroplasts making 0 turns in each cell or slightly curved (Illustrations of The Japanese Fresh-water Algae, 1977).

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