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Chlorophyceae: Chlorococcales: Chlorococcaceae (Oocystaceae)

 Tetraedron regulare
Kützing var. regulare

Tetraedron 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:
Similar genus -->> Tetraedriella (Xanthophyceae); Goniochloris (Xanthophyceae);

Tetraedron regulare, cell body 12 μm long, 14 μm wide, x 400, x 640, Vermont-Maine U.S.A., August 7-13, 1999, 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
Tetraedron Tetraedron Tetraedron Tetraedron Tetraedron

Tetraedron, Uruguay 1999, photo by Y. Tsukii

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