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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum denticulatum
(Nägeli) Archer

Staurastrum 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:

Staurastrum denticulatum (Nägeli) Archer, cell body ?? μm long, 28 μm wide, isthmus ?? μm wide, x 640, Ohnuma (a pond in Ohnuma enchi), Nasu-shiobara city (formerly Shiobara town), Tochigi Pref., Japan, May 5, 2006, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum denticulatum Staurastrum denticulatum

Images of collecting locality: Ohnuma (a pond in Ohnuma enchi), Nasu-shiobara city (formerly Shiobara town), Tochigi Pref., Japan, May 5, 2006, by Y. Tsukii

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