Genus: Cingulum (horizontal groove) located at the center of the body
(Illustrations of The Japanese Fresh-water Algae, 1977).
Cingulum more or less median; sulcus straight (Illrustrated Guide, 1985).
Species:
Cell body 36-40 μm long
(An Illustrated Guide to Freshwater Zooplankton in Japan, 2000)
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