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Chlorophyceae: Chlorococcales: Scenedesmaceae

 Actinastrum hantzschii
Lagerheim var. hantzschii

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 4 or 8 cells; body spindle-shaped, truncated at both ends; 10-25 μm long, 3-6 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Actinastrum hantzschii, cell body 14 μm long, 2 μm wide, L/W=7, x 640, Mihashi Park, Saitama city (Omiya), Saitama Pref., Japan, October 2, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Actinastrum hantzschii

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