Phylum: Charophyta   Family: Desmidiaceae

Staurodesmus corniculatus (P. Lundell) Teiling 1967

A rare species found in slightly acidic waters, usually in the plankton of mesotrophic shallow lochs. It would appear to have an Atlantic distribution.

References: 
Teiling, E. (1967) The Desmid Genus Staurodesmus. A taxonomic study.
Coesel, P.F.M. & Meesters, K.J. (2013) European Flora of the Desmid Genera Staurastrum and Staurodesmus.