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Chlorophyceae: Chlorococcales: Scenedesmaceae

 Scenedesmus abundans
var. longicauda 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. longicauda): Cell body 8-10 μm long, 3-4 μm wide; outer cells with longer spiny projections at both ends (10-12 μm long) and at outer sides (5-7 μm long) (Illustrations of The Japanese Fresh-water Algae, 1977).

Scenedesmus abundans var. longicauda G. M. Smith, cell body elongated ellipsoidal, 9 μm long, 3 μm wide, spines up to 8 μm long, x 640, Kaisei park, Koriyama, Fukushima Pref., Japan, 2001 collected by H. Shiomizu, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus abundans Scenedesmus abundans Scenedesmus abundans Scenedesmus abundans Scenedesmus abundans Scenedesmus abundans Scenedesmus abundans Scenedesmus abundans

Scenedesmus abundans (Kirchner) Chodat var. abundans: Colonies of 4 cells arranging lineary; cell body ovoid or ellipsoidal in shape, 9-20 μm long, 3-5 μm wide; outer cells with long spines at both ends (6-8 μm long) and short spines at outer side (3-5 μm long); inner cells sometimes have a short spine at both ends (Illustrations of The Japanese Fresh-water Algae, 1977).

* Scenedesmus abundans var. longicauda G. M. Smith: Cell body 8-10 μm long, 3-4 μm wide; outer cells with longer spiny projections at both ends (10-12 μm long) and at outer sides (5-7 μm long) (Illustrations of The Japanese Fresh-water Algae, 1977).

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