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The genus Gymnogonos (Anthoathecata: Capitata: Corymorphidae)—redescription of known species and description of a new species from the North Pacific

Published online by Cambridge University Press:  22 July 2008

S.D. Stepanjants  and
A. Svoboda
S.D. Stepanjants*
Affiliation:
Zoological Institute of the Russian Academy of Sciences, Saint-Petersburg, 199034
A. Svoboda
Affiliation:
Ruhr University, Bochum, Germany
*
Correspondence should be addressed to: S. Stepanjants, Zoological Institute of the Russian Academy of Sciences, Universitetskaya nab. 1 St Petersburg, email:[email protected]
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Abstract

Four valid species of the genus Gymnogonos are known at this point of investigations: G. crassicornis (northern Atlantic and the Arctic Seas); G. obvolutus (northern Atlantic and the Arctic Seas); G. ameriensis (circumantarctic distribution) and the new species G. pacificus (northern Pacific). Other species, such as Corymorpha antarctica (Pfeffer, 1889) and Tubularia cingulata (Vanhöffen, 1910) from the southern hemisphere are recognized as ‘species inquirendae’. New descriptions and taxonomic discussions of the known Gymnogonos species have been proposed. This genus has a typical bipolar distribution in the classical meaning of this term. This genus origin may rise from tropical Corymorphidae by neoteny in the period of glacial cooling.

Keywords

genus Gymnogonosnew speciesbipolar distributionNorth Pacific
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Special Issue 8: Hydrozoans , December 2008 , pp. 1619 - 1629
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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