Phylum: Charophyta Family: Closteriaceae
Closterium cynthia De Notaris 1867
The species is widespread and common in association with peaty pools and loch-margins. Almost identical to C. jenneri but that species has no striae or girdle bands.
References:
Brook, A.J. & Williamson, D.B. (2010) A Monograph on some British Desmids
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands
Ruzicka, J. (1977) Die Desmidiaceen Mitteleuropas, Volume 1, Part 1
West, W. & West, G.S. (1904) A Monograph of the British Desmidiaceae, Volume 1