Phylum: Euglenophyta   Family: Euglenaceae

Euglena proxima P.A. Dangeard

A widely distributed species and probably common but under-recorded. It would appear to tolerate a range of water condition including mildly polluted

References: 
John, D.M., Whitton, B.A. & Brook, A.J. (2011 second edition) The Freshwater Algal Flora of the British Isles
Wehr, J.D., Sheath, R.G. & Kociolek, J.P. editors (2015 second edition) Freshwater Algae of North America