Subgenus: Cell body cylindrical or dumbbell-shaped, dorso-ventrally not compressed, transverse section circular.
Section [ Eudysphinctium ]: Cell body dumbbell-shaped, constriction strong, cell surface smooth, dotted or punctated (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Google Image Search

C. zonatum var. zonatum ? 49 x 23 μm Omine-numa Tsukiyono Gunma, 2003	C. zonatum var. zonatum ? 49 x 23 μm Omine-numa Tsukiyono Gunma, 2006	C. zonatum var. zonatum ? 46 x 32 μm Omine-numa 6 Minakami Gunma, 2007	C. zonatum var. zonatum ? μm Omine-numa 5 Minakami Gunma, 2008
C. zonatum var. zonatum ? μm Kareki-numa Nikko Tochigi, 2008	C. zonatum var. zonatum ? 50 x 23.5 μm Ichinose-enchi Norikura highland Nagano, 2006

Please click on species name for more images.

Copyright Protist Information Server