Phylum: Charophyta Family: Desmidiaceae
Staurodesmus connatus (P.Lundell) Thomasson
An acidophile of moorland pools and bog. Probably widespread in such habitats but not common
References:
Thomasson, K. (1960) Notes on the plankton of Lake Bangweulu, Part 2
Coesel, P.F.M. & Meesters, K.J. (2013) European Flora of the Desmid Genera Staurastrum and Staurodesmus