Cosmarium granatum Brébisson ex Ralfs 1848

    Cells small sized, 1.5-1.75 times longer than broad, measures 35-38 µm length and 23-26 µm width. Cells deeply constricted at the center and sinus is closed, isthmus is 6-8 µm. Semicell trapezoid in shape, basal angle and end of apex rounded or slightly flatten with sparsely punctuated cell wall. Semicells elliptical in both lateral and vertical view.