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Chlorophyceae: Chlorococcales: Scenedesmaceae

 Pseudotetradesmus quaternarius
Hirose et Akiyama

Pseudotetradesmus Genus: Cells arranged three-dimentionally; cell body crescent or cylindrical in shape, slightly curved, separated from each other, arranged longitudinally parallel (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Colonies of 4 cells; cell body cylindrical, slightly swelled at the center, both ends bluntly truncated, 8-18 μm long, 5-9 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> Scenedesmus producto-capitatus;

Pseudotetradesmus quaternarius Hirose et Akiyama (Scenedesmaceae, Chlorococcales), similar to Scenedesmus producto-capitatus Schmula var. indicus (Philipose) Hegewald, cell body crescent-shaped with both ends truncated, 13 μm long, 7 μm wide, x 400, x 640, Mizumoto Park, Katsushika-ku, Tokyo, Japan, July 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
Pseudotetradesmus quaternarius Pseudotetradesmus quaternarius Pseudotetradesmus quaternarius Pseudotetradesmus quaternarius Pseudotetradesmus quaternarius Pseudotetradesmus quaternarius

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