Genus: Unicellular; planktonic; cell body tetrahedron in shape; each corner drawn out to form a projection;
many chloroplasts disc-shaped, without pyrenoids
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:
Similar genus -->> Tetraplektron;
Tetraedron;
Tetraedriella spinigera,
cell body 24 μm long, 24 μm wide, L/W=1.0,
x 640, Nanbata castle park, Fujimi city, Saitama Pref., Japan, September 18, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640