Phylum: Charophyta Family: Desmidiaceae
Cosmarium quadrifarium P. Lundell
A widespread but seemingly rare species found in the tychoplankton of lochans and pools, also found in mountainous regions.
Kouwets, F.A.C. (in manuscript) European Flora of the Desmid Genus Cosmarium
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands
West, W. & West, G.S. (1908) A Monograph of the British Desmidiaceae, Volume 3