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Chlorophyceae: Chlorococcales: Scenedesmaceae

Scenedesmus opoliensis
P. Richter
= Desmodesmus opoliensis (P. Richer) E. Hegewald

Scenedesmus opoliensis 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: Coloies of 4, 8 cells, attached adjacent cells at the center, arranging linearly; cell body spindle-shaped, 12-28 μm long, 5-8 μm wide; outer cells with long spiny projections 5-28 μm long; inner cells sometimes with a short spines (Illustrations of The Japanese Fresh-water Algae, 1977). Cells arranging lineary but not on a flat plane, outer cells attached inner cells slightly frontal side, thus forming a plane curve.
Similar species -->> S. carinatus; S. protuberans; S. quadricauda; S. circumfusus;


Scenedesmus opoliensis Richter, cell body spindle-shaped, 18 μm long, 7 μm wide, L/W=2.6, spines 12 μm long, x 640, O-ike, Shiroyama Park, Okegawa city, Saitama Pref., Japan, January 29, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus opoliensis Scenedesmus opoliensis Scenedesmus opoliensis

Images of collecting locality: O-ike, Shiroyama Park, Okegawa city, Saitama Pref., Japan, January 29, 2006 by Y. Tsukii


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