Literature
  • 1987
  • The Glyceridae (Polychaeta) of the North Atlantic and Mediterranean, with descriptions of two new species. Jour. of Nat. Hist., 21: 167-189.
  • , Åkesson 1990
  • Ophryotrocha socialis n. sp., a link between two groups of simultanous hermaphrodites within the genus (Polychaeta, Dorvilleidae). Ophelia, 31(3): 145-162.
  • Orrhage 1962
  • Über die äussere Morphologie der Familie Apistobranchidae Mesnil & Caullery (Polychaeta sedentaria). Zool. Bidr. Upssala, 33: 423-446.