Literature

• GBIF. Global Biodiversity Information Facility. www.gbif.org. [link]

Literature references linked to higher taxa

• Catalogue of Life. Species 2000 & ITIS. [link] (Geoplanidae)
• Humann, P. 1992. Reef Creature Identification. New World Publications. (Platyhelminthes)
• WoRMS. World Register of Marine Species. www.marinespecies.org. [link] (Platyhelminthes)