Phylum: Charophyta Family: Desmidiaceae
Cosmarium carinthiacum Lütkemuller 1942
A widespread, tiny cell that is not at all common - possibly overlooked. An acidophile most likely to be found in oligotrophic waters such as peaty moorland pools, often in association with Sphagnum.
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
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands