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 25-38 μm long, 20-26 μm wide; constriction 7-10 μm;
indentation widely opened and rounded the the extremity; semicells subtriangular with broadly rounded
margins; vertical view of semicells triangular with broadly rounded angles and sides strongly concave;
filaments not twisted
(Phtomicrographs of the Fresh-water Algae, vol.3, 1985)
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