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Chlorophyceae: Chlorococcales: Hydrodictyaceae

 Pediastrum muticum
Kützing var. longicorne Raciborski
( or P. boryanum (Turpin) Meneghini var. longicorne Reinsch )

Pediastrum muticum Genus: Colonies of a fixed number of cells, flat, circular in shape; cell body polygonal in shape, with horn-like projections; cell wall garanulated, wrinkled or notched; chloroplasts plate-like or reticular; asexual reproduction by zoospore; sexual reproduction by isogametes (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Pediastrum muticum Kützing, colony about 190 μm wide, x 640, Uzuma-koen (park), Tochigi city, Tochigi Pref., Japan, January 4, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Pediastrum muticum Pediastrum muticum

Images of collecting locality: Uzuma-koen (park), Tochigi city, Tochigi Pref., Japan, January 4, 2007 by Y. Tsukii

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