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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum avicula
Brébisson in Ralfs var. subarcuatum (Wolle) W. et. G.S. West

Staurastrum avicula 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 avicula Brébisson in Ralfs var. subarcuatum (Wolle) W. et. G.S. West cell body 24 μm long, 30 μm wide (excluding spines), x 640, Numappara marsh, Nasu-shiobara city (formerly Kuroiso city), Tochigi Pref., Japan, August 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum pileatum Staurastrum pileatum Staurastrum pileatum Staurastrum pileatum Staurastrum pileatum Staurastrum pileatum

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