Cosmarium porteanum W. Archer 1860

Division     Charophyta
Class     Zygnematophyceae
Order     Desmidiales
Family    Desmidiaceae

    Cells small, 1.3 times longer than broad; cells measure 20–27 μm in length and 14–18 μm in width. Cells deeply constricted at median and sinus opened, isthmus slightly elongated, 6–8 μm. Semicells elliptical with rounded granule, circular in lateral view and, elliptical in vertical view.


Thalli collected as plankton.

Distribution in India

Tamil Nadu.