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Chlorophyceae: Chlorococcales: Scenedesmaceae

Scenedesmus perforatus
Lemmermann
or Scenedesmus tropicus Crow

Scenedesmus perforatus Species: Colonies sometimes surrounded by mucilage; cell body cylindrical to spool-shaped, with broadly rounded ends and slightly concave sides, 10-21 μm long, 3-8 μm wide; cells arranged in a linear series contacting at the polar regions of the sides making intercellular perforation between the cells; outer cells with slightly convexed outer side and a long, slightly curved spine at each corner; cell wall smooth or punctate (Photomicrographs of the Freshwater Algae, vol. 16, 1996).

* Preliminary DNA analyses showed that stock Ffu-1, an isolate from these cells, is not belong to S. perforatus, but to S. tropicus. Ffu-1 may belong to an intermediate type between both species (communicated by Dr. E. Hegewald at Research Centre Jülich, ICG III Phytosphere, Germany, December 2005).


Scenedesmus perforatus (or S. tropicus ?), cell body 32 μm long, 10 μm wide, spines 26 μm long, x 640, Umi-no-nakamichi Seaside Park, Fukuoka city, Fukuoka Pref., Japan, October 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 perforatus Scenedesmus perforatus Scenedesmus perforatus


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