Phylum: Charophyta   Family: Desmidiaceae

Staurastrum scabrum J. Ralfs 1848

A triradiate species with an Arctic-boreal distribution.
Cell dimensions: L: 27-40 µm; B: 26-38 µm; Is: 9-13 µm.
Widespread in a British and European context but not common. An acidophile found in oligotrophic bogs and moorland pools.

References: 
Coesel, P.F.M. & Meesters, K.J. (2013). European Flora of the Desmid Genera Staurastrum and Staurodesmus.
Van Westen, M.C. (2024).Sieralgen in Drenthe.
West, W., West, G.S. & Carter, N. (1923). A Monograph of the British Desmidiaceae, Volume 5.