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Trunk : Cnidarians (Cnidaria)
Class : Hydrozoa (Hydrozoa)
Subclass : Hydroidolina
Order : Anthoathecata
Subordination : Capitata
Family : Boreohydridae
Scientific name
Westblad , 1947

The Boreohydridae are a family of hydrozoa (Hydrozoa) from the tribe of the cnidarians (Cnidaria) that live exclusively in the sea . It is a small family of two species , each in monotypical genera , whose occurrence is limited to the eastern North Atlantic and its tributaries and the Arctic Ocean.


The two species in this family do not develop a free medusa stage , only polyps . The hydrants are relatively small and solitary. They only have a wreath of reduced tentacles that sits around the mouth or in the middle part of the body. The tentacles may or may not be capitat. The perisarc is reduced or completely absent. The gonophores are tight sacs of spores.

Geographical occurrence

The two species of the two monotypical genera of the family were found in the northern North Atlantic (Norway) and the Arctic Ocean (White Sea) as well as in the western Baltic Sea , the North Sea and the western Mediterranean .


The family currently includes only two monotypical genera:



  • Jean Bouillon, Cinzia Gravili, Francesc Pagès, Josep-Maria Gili, Fernando Boero: An introduction to Hydrozoa. Publications Scientifiques du Muséum, Paris 2006, ISBN 2-85653-580-1 , ( Mémoires du Muséum national d'Histoire naturelle 194), pp. 1-591.
  • Marymegan Daly, Mercer R. Brugler, Paulyn Cartwright, Allen G. Collin, Michael N. Dawson, Daphne G. Fautin, Scott C. France, Catherine S. McFadden, Dennis M. Opresko, Estefania Rodriguez, Sandra L. Romano, Joel L. Stake: The phylum Cnidaria. A review of phylogenetic patterns and diversity 300 years after Linnaeus. In: Zootaxa 1668, 2007, ISSN  1175-5326 , pp. 127-182, abstract (PDF; 406 kB) .


Individual evidence

  1. OV Bozhenova, SD Stepan'yants and A M. Sheremetevskij: The first finding of the meiobenthic Cnidoria Boreohydra simplex (Hydrozoa, Athecata) in the White Sea. Zoologičeskij žurnal, 68 (7): 11-16, Leningrad / St. Petersburg 1989 ISSN  0044-5134
  2. Peter Schuchert: The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Capitata Part 1. Revue Suisse de Zoologie, 113 (2): 325-410, Geneva 2006 PDF
  3. ^ World Hydrozoa Database

Web links