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Xanthophyceae: Mischococcales: Pseudostaurastrumceae

 Pseudostaurastrum hastatum
(Reinsch) Chodat

Pseudostaurastrum Genus: Unicellular; planktonic; cell body guadrangular, each corner drawn out and branched two times forming 2-3 short, thick projections; many chloroplasts disc-shaped, without pyrenoids (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:
Similar genus -->> Staurastrum; Tetraedron;

Pseudostaurastrum hastatum, cell body 32 μm long, 34 μm wide, L/W=0.9, x 640, west end of Kondo-numa (Kondo pond), Kondo-numa park, Tatebayashi city, Gunma Pref., Japan, April 30, 2007 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Pseudostaurastrum hastatum Pseudostaurastrum hastatum Pseudostaurastrum hastatum

Images of collecting locality: west end of Kondo-numa (Kondo pond), Kondo-numa park, Tatebayashi city, Gunma Pref., Japan, April 30, 2007 by Y. Tsukii

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