|  Species: Cells 8-17 μm; 
colony 20-50 μm to 250 μm; 
16 cells as a tight sphere within clear matrix 
(How to know the protozoa, 1979).  
Colony barrel-shaped, 8- or 16-celled; cells wedge-shaped; chloroplast longitudinally striated; 
colony 20-42 μm across, 60 μm 
long; cells 8-17 μm diam. (Illustrated Guide, 1985). 
Sexual reproduction by isogamy 
(An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).  
Sexual reproduction by iso- or anisogamy 
(Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983). |