Family: Unicells; cell wall present; two flagella (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Similar to Chlamydomonas, but pyrenoids absent.

C. tenebraria ? 1 clip cell 11-16 μm Uruguay, 1999

C. tenebraria ? 1 clip cell 11-16 μm Uruguay, 1999