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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, daughter cells attached forming curved colony, cell body μm long, μm wide, x 640, Umi-no-nakamichi Seaside Park, Fukuoka city, Fukuoka Pref., Japan, October 2001 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus Scenedesmus Scenedesmus Scenedesmus Scenedesmus Scenedesmus Scenedesmus Scenedesmus Scenedesmus
Cell body μm long, μm wide, longitudinal ridges present
Scenedesmus protuberans Scenedesmus protuberans Scenedesmus protuberans Scenedesmus protuberans


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