Phylum: Charophyta   Family: Desmidiaceae

Staurastrum bohlinianum W. Schmidle 1898

First described and illustrated by Schmidle (1898: 53, pl. 3: 3). Named for Knut Harald Bohlin (1869-1956), Swedish botanist and phycologist. A small cell covered in small denticulations, more pronounce at the lateral angles.
Cell dimensions: L: 20-24 µm; B: 20-27 µm; Is: 8.2-9.5 µm.
A seemingly rare species found in slightly acidic condition such as moorland bogs and vegetated loch-margins.

References: 
Coesel, P.F.M. & Meesters, K.J. (2013) European Flora of the Desmid Genera Staurastrum and Staurodesmus.
Schmidle, W. (1898) Über einige von Knut Bohlin in Pite Lappmark und Vesterbotten gesammelte Süsswasseralgen.