 
 
Chlorophyceae: 
Chlorococcales: Scenedesmaceae
Scenedesmus longus
Meyen, Syn: S. brevispina (G. M. Smith) Codat
|  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:
 | 
Scenedesmus longus Meyen ?, 
cell body 13 μm long, 4-5 μm wide, spines 2 μm long, 
x 640, Iruma river, Kami-terayama, Kawagoe city, Saitama Pref., Japan, January 18, 2004 by Y. Tsukii
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
Scenedesmus longus Meyen ?, 
cell body 12 μm long, 5 μm wide, 
x 640, Iruma river, Kami-terayama, Kawagoe city, Saitama Pref., Japan, January 18, 2004 by Y. Tsukii
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
 
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