Genus: Unicellular; planktonic; cell body oval or ellipsoidal, both ends rounded, covered with many elongated spiny-projections; one or 2-4 chloroplasts parietal plate-like with a single pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998). Species:

31 μm 63 μm 94 μm; x 640