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Gamophyceae: Zygnematales: Zygnemataceae

Spirogyra majuscula
Kützing var. majuscula

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 cellls 68-190 μm long, 50-80 μm diam., 5-8 chloroplasts straight or slightly curved; conjugation scalariform, tubes formed from both gametangial cells; zygospores compressed spherical, 70-75 μm diam., medial spore wall thick, 3-5 μm in thickness, brown, smooth when matured (Photomicrographs of the Fresh-water Algae, 1985).


Spirogyra majuscula, cell body μm long, 69 μm wide, covered with thick gelatinous sheaths, x 640, Mitsu-ike Park, Tsurumi-ku, Yokohama city, Kanagawa Pref., Japan, January 2002 by Y. Tsukii
x 100, x 200, x 400
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
x 640
Spirogyra Spirogyra
x 100, x 200, x 400
Spirogyra Spirogyra Spirogyra Spirogyra Spirogyra
x 640
Spirogyra


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