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

References

• Borges, P.A.V., Costa, A., Cunha, R., Gabriel, R., Gonçalves, V., Martins, A.F., Melo, I., Parente, M., Raposeiro, P., Rodrigues, P., Santos, R.S., Silva, L., Vieira, P. & Vieira, V. (Eds.) (2010). A list of the terrestrial and marine biota from the Azores. Princípia, Oeiras, 432 pp.
• 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
• Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
• Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp
• Govindarajan, A.F.; Boero, F.; Halanych, K.M. (2006). [Phylogenetic analysis with multiple markers indicates repeated loss of the adult medusa stage in Campanulariidae (Hydrozoa, Cnidaria)]. Molecular Phylogenetics and Evolution 38: 820-834
• Hayward, P.J. & Ryland, J.S. (ed.), (1995b). Handbook of the marine fauna of North-West Europe. Oxford: Oxford University Press.
• 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.
• Howson, C.M. & Picton, B.E. (ed.), (1997). The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
• Hydrozoa (2012). Obelia bidentata Clark, 1875. 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=117385 on 2013-03-02
• ILVO macrofauna data: macrofauna monitoring on the Belgian Part of the North Sea since 1979
• Leewis, R. (2002). Flora en fauna van de zee [Marine flora and fauna]. Veldgids, 16. KNNV Uitgeverij: Utrecht, The Netherlands. ISBN 90-5011-153-X. 320 pp.
• MEDIN (2011). UK checklist of marine species derived from the applications Marine Recorder and UNICORN, version 1.0.  
• 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.
• North-West Atlantic Ocean species (NWARMS)
• Ramos, M. (ed.). 2010. IBERFAUNA. The Iberian Fauna Databank
• 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.
• Syntype:
• Syntype: Clark, S. F. 1875. Trans. Conn. Acad. Arts Sci. 3: 58, pl. 9, fig. 2.
• UNESCO-IOC Register of Marine Organisms
• 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