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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, cell body 13 μm long, 5 μm wide, L/W=2.6, x 640, Jizoh-bori at Sannoh Park, Saitama city, Saitama Pref., Japan, November 13, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Pseudotetradesmus quaternarius Pseudotetradesmus quaternarius

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