Staurodesmus convergens (Ehrenberg ex Ralfs) Lillieroth 1950

Division     Charophyta
Class     Zygnematophyceae
Order     Desmidiales
Family    Desmidiaceae
Basionym     Arthrodesmus convergens Ehrenberg ex Ralfs
SynonymStaurastrum convergens Meneghini; Arthrodesmus convergens f. typica W.B.Turner

    Cells medium size with 2 (3) radiate structures. Cells broader than long or sometime as broad as long measures 43-48 µm in length and 46-54 µm in breadth. Cells deeply constricted, sinus open widely outside, isthmus 12-18 µm. Semicells ellipsoid with truncated apex and rounded basal angles. Lateral margins with pointed and slightly curved spines, 11-18 µm in length. Semicells ellipsoid or rarely triangles in vertical view.


Freshwater planktonic alga prefers acidic, oligo-mesotrophic water bodies.