Phylum: Charophyta   Family: Desmidiaceae

Cosmarium pseudopyramidatum P. Lundell 1871

Found in acidic bogs, peaty pools and loch margins. Earlier reports suggest it should be quite common here but recent sampling has not produced many records.

References: 
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands
John, D.M. & Williamson, D.B. (2009) A Practical Guide to the Desmids of the West of Ireland
West, W. & West, G.S. (1905) A Monograph of the British Desmidiaceae, Volume 2