Phylum: Charophyta   Family: Desmidiaceae

Staurastrum verticillatum W. Archer 1869

An extremely rare desmid originally found by Archer (1869) in Ireland. There are just two or three other records for Scotland including one from Lewis. Found in acidic oligotrophic waters such as moorland lochs and boggy pools.

References: 
Archer, W. (1869) In: Dublin Microscopical Club. Quarterly Journal of Microscopical Science, New Series 9: 196.
West, W., West, G.S. & Carter, N. (1923) A Monograph of the British Desmidiaceae, Volume 5
Coesel, P.F.M. & Meesters, K.J. (2013) European Flora of the Desmid Genera Staurastrum and Staurodesmus