Genus: cell body flat, constricted at the center; semicell ellipsoidal or subtriangular, central area of the apex slightly elevated,
cells connected with each other at their central area of apex forming filament.
Species:
cell body 8.4 μm long, 8.4-12 μm wide, constriction 4.2-4.8 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
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