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Chlorophyceae: Chlorococcales: Chlorococcaceae (Oocystaceae)

Tetraedron trigonum
(Nägeli) Hansgirg var. trigonum

Tetraedron trigonum Genus: Cell body short, radiate in shape; apical view of the cell, triangular, polygonal, ellipsoidal or spindle-shaped; zygospores formed outside of mother cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Unicells, planktonic; cell body flat, triangular (or qadrangular) in shape; laterally concave, 20-30 μm long; corners tapered into straight or slightly curved spines, 4-6 μm long; cell wall smooth (Photomicrographs of the Freshwater Algae, vol. 1, 1984).
Similar genus -->> Tetraedriella (Xanthophyceae); Goniochloris (Xanthophyceae);


Tetraedron trigonum var. trigonum, cell body 24 μm wide, x 640, a water reservoir (pond) near Yamaguchi university, Yamaguchi city, Yamaguchi Pref., November 21, 2004, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Tetraedron Tetraedron


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