Phylum: Charophyta Family: Desmidiaceae
Cosmarium ovale Ralfs ex Ralfs 1848
Found in the tychoplankton of mainly oligotrophic lochs and lochans. Widely distributed but rarely recorded.
References:
Kouwets, F.A.C. (in manuscript) European Flora of the Desmid Genus Cosmarium
John, D.M. & Williamson, D.B. (2009) A Practical Guide to the Desmids of the West of Ireland
West, W. & West, G.S. (1908) A Monograph of the British Desmidiaceae, Volume 3