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Chlorophyceae: Chlorococcales: Scenedesmaceae

Scenedesmus polydenticulatus
Hortobagyi

Scenedesmus 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: Cell body spindle in shape or long ellipsoid, slightly curved, tapered at both ends, 15-20 μm long, 4-8 μm wide, cell body covered with short thin spines, outer cells with 2-3 long spines at both ends, inner cells with 2-3 long spines at only one end, cells attached side by side, slightly zigzag (Photomicrographs of the Freshwater Algae, vol. 15, 1995).
Similar genus -->> S. denticulatus; S. spinulatus


Scenedesmus polydenticulatus, cell body 19 μm long, 6.5 μm wide, spines at both ends 2-2.5 μm long, x 640, Naga-ike (pond), Shinbaru, Sue-machi (Sue town), Fukuoka Pref., Japan, October 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus polydenticulatus Scenedesmus polydenticulatus


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