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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, 28 μm wide (excluding spines 4 μm long), L/W=, isthmus 9 μm wide, x 640, No.5, Kashibaru marsh, Karatsu city, Saga Pref., Japan, November 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum avicula Staurastrum avicula Staurastrum avicula Staurastrum avicula

Staurastrum avicula Brébisson in Ralfs var. subarcuatum (Wolle) W. et. G.S. West, cell body ? μm long, 28 μm wide, L/W=, isthmus μm wide, x 640, No.5, Kashibaru marsh, Karatsu city, Saga Pref., Japan, November 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum avicula Staurastrum avicula

Images of collecting locality: No.5, Kashibaru marsh, Karatsu city, Saga Pref., Japan, November 22, 2006 by Y. Tsukii

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