|  Species: 
Cell body ellipsoidal or slightly ovoid, 10-15 μm long, 5-10.5 μm wide; 
young daughter cells slightly asymmetrical; cellwall thin; papilla absent; 
length of flagella nearly the same as that of cell body; 
chloroplast cup-shaped; a pyrenoid central-lateral or at posterior half of the cell; 
stigma at equator or anterior; nucleus centrally located or slightly anterior 
(Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983). |