Phylum: Charophyta   Family: Desmidiaceae

Hyalotheca mucosa Ralfs 1848

A species of slightly acidic to neutral waters, found with the plankton of shallow lochs. Widespread in the Outer Hebrides but not common.

References: 
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
West, W., West, G.S. & Carter, N. (1923) A Monograph of the British Desmidiaceae, Volume 5