Marine Biology

, Volume 39, Issue 2, pp 197–202 | Cite as

Polyp and medusa of Dipurena bicircella n. sp. (Hydrozoa: Corynidae) from Northern California

  • J. T. Rees


The polyp and medusa of Dipurena bicircella n. sp., a metagenic hydrozoan from Northern California, USA, is described. The arrangement of capitate tentacles of the polyp, in two alternating cycles or circlets, is unique to the genus Dipurena as well as to the family Corynidae. Medusae released in the laboratory attained sexual maturity in 2 weeks. The adult medusa can be distinguished from other medusae of the genus by means of 2 gonad rings, a slight terminal nematocyst cluster on each tentacle, and a relatively small size (about 2 mm in bell height). The polyp was not found in association with sponges, as is the case with some of the other polyps of the genus Dipurena. The medusa is not yet known from the plankton.


Sponge Sexual Maturity Capitate Tentacle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • J. T. Rees
    • 1
    • 2
  1. 1.Bodega Marine LaboratoryUniversity of CaliforniaBodega BayUSA
  2. 2.Lawrence Berkeley Laboratory Energy and Environment DivisionUniversity of CaliforniaBerkeleyCaliforniaUSA

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