Staurastrum heinerlianum

mouse over Images © Alfred van Geest

Staurastrum heimerlianum. Notice fusiform semicells ending in about parallel processes.

Cell dimensions (L x B): 16 x 30 µm

 

 

Desmid of the month
January 2023

Staurastrum heimerlianum

Cells of Staurastrum heimerlianum are usually quadriradiate, the angles produced to form moderately long processes. Semicells are transversionally fusiform with parallel or slightly convergent processes which are furnished with relatively stout spines arranged in some scattered, concentric series. St. heimerlianum is a rare species, recently encountered in some oligo-mesotrophic pools in the province of Drenthe.


Image © Alfred van Geest

Cell of St. heimerlianum in apical view showing its quadriradiate configuration. Notice relatively stout spines arranged in some concentric series around the processes.


Image © Marien van Westen

SEM picture of St. heimerlianum in apical view
(scale bar = 10 µm).


Images © Alfred van Geest

Another cell of St. heimerlianum with somewhat shorter processes.


Image © Marien van Westen

SEM picture of St. heimerlianum in frontal view
(scale bar = 10 µm).