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Chlorophyceae: Chlorococcales: Scenedesmaceae

Scenedesmus armatus
(Chodat) G. M. Smith var. armatus
= Desmodesmus armatus (Chodat) E. Hegewald

Scenedesmus 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. arumatus ]: Colonies of 2, 4, 8 cells arranging linearly or slightly sigzag; cell body ovoid or elongated ellipsoidal, both ends rounded, 10-20 μm long, 3.5-8 μm wide; each cell with longitudinal ridges on both sides, ridges distinct at both ends but unclear at the center; outer cells with spiny projections (8-15 μm long) at both ends (Illustrations of The Japanese Fresh-water Algae, 1977).


Scenedesmus armatus (Chodat) G.M. Smith var armatus (or S. armatus (var. boglariensis) f. crassicaudatus Hortobágyi ??) all cells with longitudinal ridges which disappear at the center of the cells, cell body 14 μm long, 3.5 μm wide, spines 14 μm long, x 640, Omachi natural park, Ichikawa city, Chiba Pref., Japan, September 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus armatus Scenedesmus armatus Scenedesmus armatus Scenedesmus armatus Scenedesmus armatus


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