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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum dorsidentiferum
W et GS West var ornatum Grünblad

Staurastrum dorsidentiferum 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: with arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species [var. ornatum]: Cell body 43-58 μm long (excluding arms), 47-94 μm long (including arms), 19-24 μm wide (excluding arms), 90-103 μm wide (including arms), isthmus 11-13 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977)

Staurastrum dorsidentiferum W. et G.S. var. ornatum Grünblad, cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, No.1, Saiko (Lake Sai) at Arakawa-Saiko park, Minami-ku, Saitama city, Saitama Pref., Japan, December 2, 2007 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 dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum Staurastrum dorsidentiferum

Images of collecting locality: No.1, Saiko (Lake Sai) at Arakawa-Saiko park, Minami-ku, Saitama city, Saitama Pref., Japan, December 2, 2007 by Y. Tsukii

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