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Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum longispinum
(Bailey) Archer var. bidentatum (Wittrock) West

Staurastrum longispinum Genus: Cell body short, radiate in shape; apical view of the cell, triangular, polygonal, ellipsoidal or spindle-shaped; zygospores formed outside of mother cells (Illustrations of The Japanese Fresh-water Algae, 1977)
Subgenus: lacks arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)

Species (var. bidentatum): cell body excluding spines 31-62 μm long, 37-64.5 μm wide (excluding spines), constriction 11-26.5 μm wide, (Illustrations of The Japanese Fresh-water Algae, 1977)


Staurastrum longispinum (Bailey) Archer var. bidentatum (Wittrock) West (or Staurastrum wildemanii ?), cell body 75 μm long, 65 μm wide (excluding spines), L/W=1.2, isthmus 28 μm wide, spines about 30 μm long, x 400, x 640, Ushidome-ike (pond), Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 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
Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum
Cell body 78 μm long, 60 μm wide, L/W=1.3, isthmus 26 μm wide, spines up to 40 μm long, x 400, x 640
Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum
Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum
Cell body 75 μm long, 60 μm wide, L/W=1.3, isthmus 27 μm wide, spines up to 40 μm long, x 640
Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum
Cell body 70 μm long, 60 μm wide, L/W=1.2, isthmus 28 μm wide, spines up to 40 μm long, x 640
Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum
Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum
Cell body μm long, μm wide, L/W=, isthmus μm wide, x 640
Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum
Cell body ? μm long, 60 μm wide, L/W=, isthmus 25 μm wide, spines up to 30 μm long, x 640
Staurastrum longispinum Staurastrum longispinum Staurastrum longispinum


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