Literature
- Kramp, P.L. 1959. The hydromedusae of the Atlantic Ocean and adjacent waters. Dana Report 46: 1-283; 2 plates, 335 text figures.
- Kramp, P.L. 1961. Synopsis of the medusae of the world. Journal of the Marine Biological Association of the United Kingdom 40: 1-469.
- Kramp, P.L. and D. Damas 1925. Les Méduses de la Norvège. Videnskabelige Meddelelser fra Dansk naturhistorisk Forening i København 80: 217-323.
- Russell, F.S. 1980. Trachymedusae. Families: Geryonidae, Ptychogastriidae, Halicreatidae. Fiches d'Identification du Zooplancton, 164 (.