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Chlorophyceae: Chlorococcales: Scenedesmaceae

 Scenedesmus costatus
Schmidle var. costatus
->> Enallax costatus (Schmidle) Pascher

Scenedesmus costatus Genus: Colonies of 4 (or 2, 8, 16) cells attached side by side, arranged linearly or zigzag; cell body elliptical or spindle or crescent in shape; terminal cells with spiny projections in many species; cell wall usually smooth, but in some species granulated or dented or ridged (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Enallax costatus (Schmidle) Pascher, formerly Scenedesmus costatus Schmidle var. costatus, cell body 16 μm long, 7 μm wide, x 640, near Imori pond, Myoko-kogen (Myoko highland), Myoko village, Niigata Pref., Japan, November 7, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus Scenedesmus Scenedesmus

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