Literature
  • Stiasny-Wijnhoff 1934
  • Some remarks on North Atlantic non-pelagic Polystylifera. Q. Jl microsc. Sci., 77: 167-190.
  • Hylbom 1957
  • Studies on palaeonemerteans of the Gullmar Fiord area (west coast of Sweden). Arkiv for Zoologi, Uppsala, 10: 539-582.