 
 
|  Genus: Four flagella of equal length inserted close together into an anterior papilla; 
contractile vacuole anterior (An illustrated guide to freshwater zooplankton in Japan, 2000). Species: | 
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400 :
 150 μm; x 400 : 
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
 
cf.
C. moewusii Gerloff: 9-16 μm long, 
5-8 μm wide; ellipsoidal to subcylindrical; 
chloroplast urn-shaped; pyrenoid laterial; stigma present (Illustrated Guide, 1985).