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Chlorophyceae: Chlorococcales: Scenedesmaceae

Scenedesmus quadricauda
(Turpin) Brébisson sensu Chodat, 1913 var. biornatus

Scenedesmus quadricauda 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 [ var. quadricauda ]: Colonies of 2, 4 or 8 cells arranging linearly; cell body elongated ellipsoidal, 11-18 μm long, 3.5-7 μm wide; terminal cells with long spiny projections (10-17 μm long); cell wall smooth.
[ var. biornatus ]: Cell body 7-15 μm long, 3-5 μm wide; all cells have spiny projections (5-14 μm long) at both ends (Illustrations of The Japanese Fresh-water Algae, 1977).
S= length of Spines; L=Body length
->> Cell division


Scenedesmus quadricauda var. biornatus, terminal cell body 22 μm long, 6 μm wide, spines 17-20 μm long, L/W= 3.7, S/L = 0.8-0.9, inner cells larger than terminal ones, x 640, Higashi-Urawa (Minuma-tanbo), Saitama Pref., Japan, June 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus Scenedesmus


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