portrait

Description:

Cosmarium quadrum P. LUNDELL

 The cells are a little longer than wide, rounded off rectangular in shape. The sides are straight or flat convex. The central cuts are deep, linear, and extended outwards. The cell wall is covered with warts. They run in crossing rows (under an angle of appr. 45°). Around each of the warts are pores, which build symmetrical hexagon in their arrangement.

  Length 55 - 85 µm, width 50 - 80 µm.
 Occurrence: Common in littoral region and quaking bogs of moor ponds and in moderate acidic moorlands in Central Europe.