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Chlorophyceae: Chlorococcales: Scenedesmaceae

 Actinastrum hantzschii
Lagerheim var. fluviatile Shroeder

Actinastrum Genus: Colonies, 3-dimensional; cell body cylindrical or long spindle in shape, radially arranged by attaching at one end to each other (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Colonies of 8, 16, 32 cells; tapered at both ends; 20-25 μm long, 2-3 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Actinastrum hantzschii var. hantzschii, cell body 25 μm long, 3 μm wide, x 640, Nakai-numa park, Nakai, Yoshikawa city, Saitama Pref., Japan, April 9, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Actinastrum Actinastrum

Images of collecting locality: Nakai-numa park, Nakai, Yoshikawa city, Saitama Pref., Japan, April 9, 2006 by Y. Tsukii

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