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Polar Biology

, Volume 29, Issue 2, pp 128–136 | Cite as

A new tritoniid species (Mollusca: Opisthobranchia) from Bouvet Island

  • Manuel Ballesteros
  • Conxita Avila
Original Paper

Abstract

Tritoniid sea slugs (Mollusca, Gastropoda, Opisthobranchia) are reported for the first time from Bouvet Island. Tritonia dantarti sp. n. shows morphological and anatomical differences with regard to the two previously known tritoniids reported from Antarctica and Sub-Antarctica, Tritonia vorax (Odhner 1926) and Tritonia challengeriana Bergh, 1884. Regarding the external morphology, T. dantarti sp. n. is characterized by a very bright orange coloration in the dorsum, white dorsal crests, highly ramified dendritic gills (the largest vertically orientated and the rest laterally orientated), and a quadrangular cross section. The radula presents very long, thin lateral teeth and the jaws present mainly unicuspidate, striated denticles. The seminal receptacle is large, pear-shaped and its grey pigmentation differs from the rest of the genital system. The Antarctic species T. challengeriana was also found in waters off Bouvet Island, while the Subantarctic species T. vorax was not found.

Keywords

Digestive Gland Hydroid Seminal Receptacle Lateral Tooth Genital Papilla 
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.

Notes

Acknowledgements

Thanks are due to A. Corbacho and S. Taboada for helping with the bibliography. We also thank C. Debenham, T. Brey, W. Arntz and the crew of R/V “Polarstern”. We are thankful for the support of the ECOQUIM projects (REN2003-00545 and REN2002-12006-E ANT). We thank S. Thatje, H. Wägele and M. Schrödl for reading and improving the first draft of this paper.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Department de Biologia Animal, Facultat de BiologiaUniversitat de BarcelonaBarcelonaSpain
  2. 2.Centre d‘Estudis Avançats de Blanes (C.S.I.C.)BlanesSpain

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