Literature
  • Manuel 1981
  • British Anthozoa. Synopses of the British Fauna (N.S.)., 18.
  • Millar 1970
  • British Ascidians. Synopses of the British Fauna (N.S.)., 1.
  • Mortensen 1927
  • Echinoderms of the British Isles. Oxford University Press, London.