Phylum: Charophyta Family: Desmidiaceae
Cosmarium meneghinii Brébisson ex Ralfs
A widespread species but not as common at it was once reported, especially for Scotland generally. The parameters have moved considerably since Ralfs (1848) first described it. It is currently regarded as a species complex
References:
Ralfs, J. (1848) The British Desmidieae
West, W. & West, G.S. (1908) A Monograph of the British Desmidiaceae, Volume 3
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands