image_list image_listE

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 27 μm long, μm wide, x 400, x 640, Vermont-Maine U.S.A., August 7-13, 1999, by Y. Tsukii
Tetraedron trigonum


Please click on images for viewing enlarged.
Copyright Protist Information Server