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Chlorophyceae: Chlorococcales: Scenedesmaceae

Scenedesmus circumfusus
Hortobagyi var. circumfusus

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: Colonies of 2, 4 cells arranging linearly; cell body elongated ellipsoidal, with 1-2 short spiny projections at both ends, 9-13 μm long, 3.5-5 μm wide; each cell with longitudinal rows of small dented projections on both sides; outer cells have an additional row of dented projections arranging outside (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> S. serratus;


Scenedesmus circumfusus Hortobagyi var. circumfusus (or Scenedesmus serratus ?), cell body 19 μm long, 6 μm wide, L/W=, x 640, Ikei-no-ike (pond), Nasu town, Tochigi Pref., Japan, September 3, 2006, collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Scenedesmus circumfusus Scenedesmus circumfusus Scenedesmus circumfusus


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