Phylum: Euglenophta   Family: Euglenaceae

Phacus pleuronectes  (O.F. Müller) Nitzsch ex Dujardin, 1841

Thought to be widespread in ditches, lakes and lochs

Determiner: 
Chris Johnson

References: 
John, Whitton & Brook (2011) - The Freshwater Algal Flora of the British Isles