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Gamophyceae: Zygnematales: Zygnemataceae

 Spirogyra varians
(Hassall) Kützing

Spirogyra varians 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 30-70 μm long, 30-38 μm wide; a single chloroplast making 1-4 turns in each cell; conjugation scalariform; female gametangium swelled toward male gametangium; zygospores ellipsoidal or broad ellipsoidal or spherical in shape (45-65 μm long, 30-35 μm wide) (Illustrations of The Japanese Fresh-water Algae, 1977).

Spirogyra varians (Hassall) Kützing, cell body 100 μm long, 32 μm wide, L/W=3.1, a single band-form chloroplast making 3 turns in each cell, x 640, water field near Takao bridge, near Takao-sakura park, Kitamoto city, Saitama Pref., April 17, 2005 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
Cell body 43-85 μm long, 35 μm wide, L/W=1.2-2.4, a single band-form chloroplast making 2-4 turns in each cell, x 400, x 640
Spirogyra Spirogyra
Zygotes 60 μm long, 40 μm wide, L/W=1.5, x 200, x 400, x 640
Spirogyra Spirogyra Spirogyra
Zygotes 60-70 μm long, 37 μm wide, L/W=1.6-1.9, x 400
Spirogyra

** 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 daedaleoides Czurda: Vegetative cells 65-240 μm long, 29-36 μm diam., 1 chloroplast making 2.5-8 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

* Spiryogyra micropunctata Transeau: Vegetative cells 96-170 μm long, 30-34 μm diam., 1 chloroplast making 3.5-7 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra singularis Nordstedt: Vegetative cells 50-170 μm long, 29-39 μm diam., 1 chloroplast making 3-5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra varians (Hassall) Kützing: Vegetative cells 30-70 μm long, 30-38 μm diam., 1 chloroplast making 1-4 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra bicarptrata Czurda: Vegetative cells (32-) 52-68 μm long, 38-40 μm diam., 1 chloroplast making 1-4 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra variformis Transeau: Vegetative cells 60-140 μm long, 43-50 μm diam., 1 chloroplast making 1-6.5 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra scrpboculata (Stockmayer) Czurda: Vegetative cells 56-132 μm long, 32-38 μm diam., 1 chloroplast making 1-3 turns in each cell (Illustrations of The Japanese Fresh-water Algae, 1977).

Spiryogyra daedalea Lagerheim: Vegetative cells (96-) 160-280 μm long, 32-36 μm diam., 1 chloroplast 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).

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