Higher Classification: > Kingdom Animalia > Subkingdom Eumetazoa > Phylum Cnidaria > Subphylum Medusozoa > Class Hydrozoa > Subclass Hydroidolina > Order Leptothecata > Family Haleciidae > Genus Halecium

Halecium sessile Norman, 1867

Rank: Species
Taxon Status: accepted

Relationships towards this taxon

Genus group names

*Halecium*	Oken, 1815	accepted genus name
*Haloikema*	Bourne, 1890	synonym
*Thoa*	Lamouroux, 1816	synonym

Literature

original description	Norman, A M. (1867). Report of the committee appointed for the purpose of exploring the coasts of the Hebrides by means of the Dredge. Part II. On the Crustacea, Echinodermata, Polyzoa, Actinozoa, and Hydrozoa. Reports of the Meetings of the British Association for the Advancement of Science. 36: 193-206.
basis of record	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
additional source	Brunel, P., L. Bosse & G. Lamarche. (1998). Catalogue of the marine invertebrates of the estuary and Gulf of St. Lawrence. Canadian Special Publication of Fisheries and Aquatic Sciences, 126. 405 pp.
additional source	Calder, D. R. and S. D. Cairns. 2009. Hydroids (Cnidaria: Hydrozoa) of the Gulf of Mexico, Pp. 381–394 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
additional source	Cornelius, P.F.S., 1975. A revision of the species of Lafoeidae and Haleciidae (Coelenterata: Hydroida) recorded from Britain and nearby seas. Bull. Br. Mus. nat. Hist., Zool. 28 8: 373-426.
additional source	Integrated Taxonomic Information System (ITIS).
additional source	Liu, J.Y. [Ruiyu] (ed.). (2008). Checklist of marine biota of China seas. China Science Press. 1267 pp.
additional source	Trott, T. J. (2004). Cobscook Bay inventory: a historical checklist of marine invertebrates spanning 162 years. Northeastern Naturalist. 11, 261-324.
additional source	Hayward, P.J. & J.S. Ryland (Eds.). (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. 627 pp.
additional source	Cairns, S.D., L. Gershwin, F.J. Brook, P. Pugh, E.W. Dawson, O.V. Ocaña, W. Vervoort, G. Williams, J.E. Watson, D.M. Opresko, P. Schuchert, P.M. Hine, D.P. Gordon, H.I. Campbell, A.J. Wright, J.A.Sánchez & D.G. Fautin. (2009). Phylum Cnidaria: corals, medusae, hydroids, myxozoans. in: Gordon, D.P. (Ed.) (2009). New Zealand inventory of biodiversity: 1. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. :59-101.
additional source	Muller, 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.
source of synonymy	Cornelius, P.F.S., 1975. A revision of the species of Lafoeidae and Haleciidae (Coelenterata: Hydroida) recorded from Britain and nearby seas. Bull. Br. Mus. nat. Hist., Zool. 28 8: 373-426.
redescription	Schuchert, P. (2001). Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa). Meddelelser om Grønland. Bioscience. 53: 1-184.
redescription	Cornelius, P. F. S. (1995). North-West European Thecate Hydroids and their Medusae. Part 1. Laodiceidae to Haleciidae. In: R.S.K. Barnes & J.H. Crothers, eds, Synopses of the British Fauna (New Series). The Linn. Soc. London and Est. Coas. Sci. Ass. - Field Studies Council. 50 : i-vii, 1-347.

Genbank

Citation

Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2025). World Hydrozoa Database. Halecium sessile Norman, 1867. Accessed through: World Register of Marine Species at: https://marinespecies.org/aphia.php?p=taxdetails&id=117605