Phylum: Charophyta   Family: Desmidiaceae

Haplotaenium minutum  (Ralfs) Bando

Common in peaty moorland pools and disused peat-cuttings

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
Tsarenko, P.M., Wasser, S.P. & Nevo, E. editors (2014) Algae of Ukraine, Volume 4: Charophyta