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Chlorophyceae: Chlorococcales: Scenedesmaceae

 Scenedesmus quadricauda
(Turpin) Brébisson sensu Chodat, 1913

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 (Illustrations of The Japanese Fresh-water Algae, 1977).

Scenedesmus quadricauda (Turpin) Brébisson sensu Chodat, inner cells 15.5 μm long, 5.5 μm wide, L/W=2.8, outer cells 14 μm long, 5 μm wide, L/W=2.8, spines 5-10 μm long, x 640, a small pond at Tsutsuji-ga-oka park, Tatebayashi city, Gunma Pref., Japan, February 18, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus quadricauda

Images of collecting locality: A small pond at Tsutsuji-ga-oka park, Tatebayashi city, Gunma Pref., Japan, February 18, 2006 by Y. Tsukii

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