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Gamophyceae: Zygnematales: Zygnemataceae

 Spirogyra daedaleoides
Czurda

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 65-240 μm long, 29-36 μm diam.; 1 chloroplast making 2.5-8 turns in each cell; conjugation scalariform; tubes formed from both gametangial cells; female gametangium cylindrical or slightly swelled; zygospores football-shaped (55-85 μm long, 30-36 μm wide) (Illustrations of The Japanese Fresh-water Algae, 1977).

Spirogyra daedaleoides Czurda (or S. longata (Vaucher) Kützing ?), cell body 88 μm long, 35 μm wide, L/W=2.5, a single chloroplast making 3.5 turns in each cell, x 200, x 400, x 640, rice field next to Uehara-ike (pond), Ueda city, Nagano Pref., Japan, July 6, 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

Images of collecting locality: Rice field next to Uehara-ike (pond), Ueda city, Nagano Pref., Japan, July 6, 2006 by Y. Tsukii

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