Reference

Colin Curds (1982): British and other freshwater ciliated protozoa. Part I Ciliophora Kinetofragminophora. Keys and notes for the identification of the free-living genera. In: Kermack D.M. & Barnes R.S.K. (eds.): Synopsis of the British fauna – Cambridge Univ. Press, Cambridge etc. – 22: 1 - 387.