Literature

• WoRMS. World Register of Marine Species. www.marinespecies.org. [link]

Literature references linked to higher taxa

• Encyclopedia of Life. [link] (Haplotaxida)
• Fauna Europaea. (Oligochaeta)
• Humann, P. 1992. Reef Creature Identification. New World Publications. (Annelida)
• Voss, G.L. 1976. Seashore Life of Florida and the Caribbean. 167. E.A. Seemann Publishing, Inc.. (Annelida)