Species: Collar present: lorica spherical or ellipsoidal: surface coarse
Species: Lorica ellipsoid, both ends narrowly rounded, lateral sides swelled;
collar present; wall scabrous with minute protuberances irregularly disposed;
23-26 μm long, 18-20 μm wide
(Photomicrographs of the Fresh-water Algae, vol.8, 1988).
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