portrait

Description:

Cosmarium pachydermum P. LUNDELL

 The cells are up to 1.4 times longer than wide and coarsely elliptical in shape. The cell halves are semicircular. The central cuts are narrowly rounded on the inside and extend strongly to the outside. The cell wall is thick. Some areas are covered closely, others are covered loosely with standing pores. The vertex view is broadly elliptical. 

 Length 100 - 120 µm, width 70 - 90 µm.
 Occurrence: acidophilic alga, widely spread in sphagnum bogs