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Chlorophyceae: Chlorococcales: Scenedesmaceae

 Scenedesmus abundans
var. spicatus (W. et G.S. West) G.M. Smith

Scenedesmus abundans 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. spicatus): Spiny projections of outer cells short (1.5-3 μm long), many; cell body 7-10 μm long, 3-4 μm wide (Illustrations of the Fresh-water Algae, 1977).

Scenedesmus abundans ?, cell body 9-10 μm long, 3 μm wide, spines up to 5 μm long, x 640, Bessho-numa, Saitama Pref., Japan, June 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 abundans var. spicatus (W. et G.S. West) G.M. Smith: Spiny projections of outer cells short (1.5-3 μm long), many; cell body 7-10 μm long, 3-4 μm wide (Illustrations of the Fresh-water Algae, 1977).

Scenedesmus abundans var. brevicauda G.M. Smith: Cell body small, ovoid in shape, 5-7 μm long, 2-3 μm wide; spiny projections short (1.5-3 μm long) (Illustrations of The Japanese Fresh-water Algae, 1977).

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