The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

• Cairns, Stephen D., Dale R. Calder, Anita Brinckmann-Voss, Clovis B. Castro, Daphne G. Fautin,.. 2002. Common and Scientific Names of Aquatic Invertebrates from the United States and Canada: Cnidaria and Ctenophora, Second Edition, 2002. American Fisheries Society Special Publication 28. xi + 115
• Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp
• Guiry, M.D. & Guiry, G.M. (2011). Species.ie version 1.0 World-wide electronic publication, National University of Ireland, Galway (version of 15 March 2010).
• Hayward, P.J.; Ryland, J.S. (Ed.) (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp.
• Hydrozoa (2012). Amphisbetia operculata (Linnaeus, 1758). In: Schuchert, P. (2012) World Hydrozoa database. Accessed through: Schuchert, P. (2012) World Hydrozoa database at http://www.marinespecies.org/hydrozoa/aphia.php?p=taxdetails&id=117874 on 2013-03-02
• Leloup, E. (1933). Contribution à la connaissance des hydropolypes de la côte des Pays-Bas [Contribution to the knowladge of the hydropolyps of the Dutch coast]. Bull. Mus. royal d'Hist. Nat. Belg./Med. Kon. Natuurhist. Mus. Belg. 9(45): 1-30
• Leloup, E. (1952). Coelentérés [Coelenterata]. ---. Institut royal des Sciences naturelles de Belgique: Brussels, Belgium. 283 pp.
• MEDIN (2011). UK checklist of marine species derived from the applications Marine Recorder and UNICORN, version 1.0.  
• Moyano H. 1995. Bryozoa. En: S Simonetti JA, MTK Arroyo, A Spotorno & E Lozada (eds) Diversidad Biológica de Chile. Comité Nacional de Diversidad Biológica. Comisión Nacinal de Investigación Cientñifica y Tecnológica, Santiago Chile. 364 pp.
• Müller, Y. (2004). Faune et flore du littoral du Nord, du Pas-de-Calais et de la Belgique: inventaire. [Coastal fauna and flora of the Nord, Pas-de-Calais and Belgium: inventory]. Commission Régionale de Biologie Région Nord Pas-de-Calais: France. 307 pp.
• Schuchert, P. (2013). WoRMS Hydrozoa: World Hydrozoa database (version 2013-03-04). In: Species 2000 & ITIS Catalogue of Life, 11th March 2013 (Roskov Y., Kunze T., Paglinawan L., Orrell T., Nicolson D., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Hernandez F., De Wever A., eds). Digital resource at www.catalogueoflife.org/col/. Species 2000: Reading, UK.
• UNESCO-IOC Register of Marine Organisms
• Vanderperren, J.-P. (1991). Report Natural History Archive 1990 [Verslag Natuurhistorisch Archief 1990]. De Strandvlo 11(3): 65-75
• van der Land, J.; Vervoort, W.; Cairns, S.D.; Schuchert, P. (2001). Hydrozoa, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 112-120