Phylum: Charophyta   Family: Desmidiaceae

Cosmarium pseudoconnatum Nordstedt 1870

A rarely recorded species of oligotrophic waters such as peat bogs, shallow lochs and moorland pools. It has a predominantly north-western distribution in the British Isles.

References: 
Kouwets, F.A.C. (in manuscript) European Flora of the Desmid Genus Cosmarium
Coesel, P.F.M. & Meesters, K.J. (2007). Mesotaeniaceae and Desmidiaceae of the European Lowlands
West, W. & West, G.S (1908). A Monograph of the British Desmidiaceae, Volume 3