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Sympagohydra tuuli gen. nov. and sp. nov. (Cnidaria: Hydrozoa) a cool hydroid from the Arctic sea ice

Published online by Cambridge University Press:  08 September 2008

S. Piraino ,
B.A. Bluhm ,
R. Gradinger  and
F. Boero
S. Piraino*
Affiliation:
Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università degli Studi del Salento, 73100 Lecce, Italy
B.A. Bluhm
Affiliation:
School of Fisheries and Ocean Sciences, Institute of Marine Science, University of Alaska Fairbanks, Fairbanks AK 99775, USA
R. Gradinger
Affiliation:
School of Fisheries and Ocean Sciences, Institute of Marine Science, University of Alaska Fairbanks, Fairbanks AK 99775, USA
F. Boero
Affiliation:
Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università degli Studi del Salento, 73100 Lecce, Italy
*
Correspondence should be addressed to: S. Piraino, Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università degli Studi del Salento, 73100 Lecce, Italy email: [email protected]
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Abstract

A new interstitial hydroid, Sympagohydra tuuli, has been collected from the three-dimensional brine channel system of the coastal fast ice off Barrow, Alaska (71°N 156ºW) in 2003 to 2006. This is the first cnidarian species described from the sea ice interstitial habitat. A morphological and systematic account of the new species is provided here. The hydroid stage is represented by solitary naked polyps, which become almost spherical under contraction. Body length can vary from 200 µm to >1 mm according to the degree of relaxation. The aboral side is extensible into a tubular foot-like projection made by epidermal tissue only, a typical feature of representatives of Protohydridae, order Capitata. However, in contrast to the other two known Protohydridae species, S. tuuli is characterized by three to four solid filiform tentacles, armed with microbasic mastigophore and desmoneme cnidocysts, and located at the base of a short hypostome bearing stenoteles. A small number of mastigophores are also scattered along the body column. Due to its unique combination of features, this taxon is designated here as a new species, and the new genus Sympagohydra is established as a new member of the class Hydroidomedusa, subclass Anthomedusae, order Capitata, family Protohydridae, to accommodate S. tuuli.

Keywords

sympagic faunainterstitial faunaArctic sea iceCnidariaHydrozoaProtohydridaeSympagohydra tuulinew speciesnew genus
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Special Issue 8: Hydrozoans , December 2008 , pp. 1637 - 1641
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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References

REFERENCES

Anokhin, B.A. (2001) Finding of Protohydra leuckarti (Cnidaria, Hydrozoa) in the Sea of Japan. Zoological Journal 80, 1411–1414.Google Scholar
Bluhm, B.A., Gradinger, R. and Piraino, S. (2007) First record of sympagic hydroids (Hydrozoa, Cnidaria) in Arctic coastal fast ice. Polar Biology 30, 1157–1563.CrossRefGoogle Scholar
Bouillon, J. (1985) Essai de classification des hydropolypes–Hydroméduses (Hydrozoa–Cnidaria). Indo-Malayan Zoology 1, 29–243.Google Scholar
Bouillon, J. and Grohmann, P.A. (1994) Pinushydra chiquitita gen. nov. et sp. nov. (Cnidaria, Hydrozoa, Athecata), a solitary marine mesopsammic polyp. Cahiers de Biologie Marine 31, 291–305.Google Scholar
Bouillon, J., Gravili, C., Pages, F., Gili, J.M. and Boero, F. (2006) An introduction to Hydrozoa. Mémoires du Muséum National d'Histoire Naturelle, Paris 194, 1–591.Google Scholar
Bozhenova, O.V., Stepanjants, S.D. and Sheremetevski, A.M. (1989) Pervoe obnaruzhenie meiobentosnoy knidarii Boreohydra simplex (Hydrozoa, Athecata) v Belom more. The first finding of the meiobenthic Cnidaria Boreohydra simplex (Hydrozoa, Athecata) in the White Sea. Zoolgicheskii Zhurnal 68, 11–16.Google Scholar
Collins, A.G., Winkelmann, S. and Schierwater, B. (2005) An assessment of partial mitochondrial 16S rDNA sequences as indicators of Corynidae (Hydrozoa, Anthoathecata) phylogeny. Zoologica Scripta 34, 91–99.CrossRefGoogle Scholar
Collins, A.G., Schuchert, P., Marques, A.C., Jankowski, T., Medina, M. and Schierwater, B. (2006) Medusozoan phylogeny and character evolution clarified by new large and small subunit rDNA data and an assessment of the utility of phylogenetic mixture models. Systematic Biology 55, 97–115.CrossRefGoogle Scholar
Giere, O. (1993) Meiobenthology: the microscopic fauna in aquatic sediments. Berlin: Springer.CrossRefGoogle Scholar
Gradinger, R., Meiners, K., Plumley, G., Zhang, Q. and Bluhm, B.A. (2005) Abundance and composition of the sea ice meiofauna in off-shore pack ice of the Beaufort Gyre in summer 2002 and 2003. Polar Biology 28, 171–181.CrossRefGoogle Scholar
Heip, C. (1971) The succession of benthic micrometazoans in a brackish water habitat. Biologisch Jaarboek 39, 191–196.Google Scholar
Heip, C. and Smol, N. (1976) On the importance of Protohydra leuckerti as a predator of meiobenthic populations. In Persoone, G. and Jaspers, E. (eds) Proceedings of the 10th European Marine Biology Symposium 2: Population dynamics of marine organisms in relation with nutrient cycling in shallow waters. Wetteren: Universa Press, pp. 285–296.Google Scholar
ICZN. (1999) International code of zoological nomenclature, 4th edition. London: International Trust for Zoological Nomenclature.Google Scholar
Petersen, K.W. (1990) Evolution and taxonomy in capitate hydroids and medusae (Cnidaria: Hydrozoa). Zoological Journal of the Linnean Society 100, 101–231.CrossRefGoogle Scholar
Pfannkuche, O. and Thiel, H. (1987) Meiobenthic stocks and benthic activity on the NE-Svalbard shelf and in the Nansen Basin. Polar Biology 7, 253–266.CrossRefGoogle Scholar
Piraino, S., Fanelli, G. and Boero, F. (2002) Variability of species' role in marine communities: change of paradigms for conservation priorities. Marine Biology 140, 1067–1074.Google Scholar
Schewe, I. (2001) Small-sized benthic organisms of the Alpha Ridge, central Arctic Ocean. Internationale Revue der Gesamten Hydrobiologie 86, 317–335.3.0.CO;2-V>CrossRefGoogle Scholar
Schuchert, P. (2006) The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Capitata. Part 1. Revue Suisse de Zoologie 113, 325–410.CrossRefGoogle Scholar
Schuenemann, H. and Werner, I. (2005) Seasonal variations in distribution patterns of sympagic meiofauna in Arctic pack ice. Marine Biology 146, 1091–1102.CrossRefGoogle Scholar
Stepanjants, S.D., Anokhin, B.A. and Kuznetsova, V.G. (2000) Hydrida composition and place in the system of Hydroidea (Cnidaria: Hydrozoa). Trudi Zoologicheskogo Instituta RAN/Proceedings of the Zoological Institute. Zoological Sessions Annual Reports 286, 155–162.Google Scholar
Thiel, H. (1988) Cnidaria. In Higgins, R.P. and Thiel, H.Introduction to the study of meiofauna. Washington DC: Smithsonian Institution Press, pp. 266–272.Google Scholar
Weissenberger, J., Dieckmann, G., Gradinger, R. and Spindler, M. (1992) Sea ice: a cast technique to examine and analyze brine pockets and channel structure. Limnology and Oceanography 37, 179–183.CrossRefGoogle Scholar