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


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.


Digestive Gland Hydroid Seminal Receptacle Lateral Tooth Genital Papilla 
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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.


  1. Arntz WE, Brey T (2005) The expedition Antarktis XXI/2 of RV Polarstern in 2003–2004. Ber Polar Meeresforsch 503:1–149Google Scholar
  2. Arntz WE, Thatje S, Linse K, Avila C, Ballesteros M, Barnes DKA, Cope T, Cristobo Rodríguez FJ, De Broyer C, Gutt J, Isla E, López-González P, Montiel A, Munilla T, Ramos Esplá A, Raupach M, Rauschert M, Rodríguez E, Teixidó N (2005) Missing link in the Southern Ocean: sampling the marine benthic fauna of remote Bouvet Island. Polar Biol (this volume)Google Scholar
  3. Avila C, Ballesteros M, Debenham C (2005) Chemical ecology of Antarctic invertebrates. In: Arntz WE, Brey T (eds) The expedition Antarktis XXI/2 of RV Polarstern in 2003–2004. Ber Polar Meeresforsch 503:68–72Google Scholar
  4. Dell RK (1990) Antarctic Mollusca: with special reference to the fauna of the Ross Sea. Bull R Soc N Z 27:1–311Google Scholar
  5. Linse K (2005) New records of shelled marine molluscs at Bouvet Island and their biogeographic affinities. Polar Biol (this volume)Google Scholar
  6. Marcus EBR (1983) The Western Atlantic Tritoniidae. Bolm Zool Univ S Paulo 6:177–214Google Scholar
  7. Odhner NH (1926) Die Opisthobranchien. Further Zool Res Swed Antarctic Exped 1901–1903, 2:1–100Google Scholar
  8. Odhner NH (1934) The Nudibranchiata. British Antarctic “Terra Nova“ Expedition, 1910. Zoology. Mollusca, Polychaeta, Chaetognata, vol VII. British Museum Natural History, London, pp 229–309Google Scholar
  9. Odhner NH (1936) Nudibranchia Dendronotacea. A revision of the system. Mem Mus Roy Hist Nat Bel 2(3):1057–1128Google Scholar
  10. Odhner NH (1963) On the taxonomy of the Family Tritoniidae (Mollusca: Opisthobranchia). Veliger 6:48–52Google Scholar
  11. Schrödl M (1999) Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions. Sci Mar 63(Suppl 1):409–416Google Scholar
  12. Schrödl M (2003) Sea slugs of southern South America. Systematics, biogeography and biology of Chilean and Magellanic Nudipleura (Mollusca: Opisthobranchia). ConchBooks, HackenheimGoogle Scholar
  13. Smith VG, Gosliner TM (2003) A new species of Tritonia from Okinawa (Mollusca: Nudibranchia), and its association with a gorgonian octocoral. Proc California Acad Sci 54(16):255–278Google Scholar
  14. Wägele H (1989) On the anatomy and zoogeography of Tritoniella belli Eliot, 1907 (Opisthobranchia, Nudibranchia) and the synonymy of T. sinuata Eliot, 1907. Polar Biol 9:235–243CrossRefGoogle Scholar
  15. Wägele H (1995) The morphology and taxonomy of the Antarctic species of Tritonia Cuvier, 1797 (Nudibranchia, Dendronotoidea). Zool J Linn Soc 113:21–46CrossRefGoogle Scholar
  16. Willan RC (1988) The taxonomy of two host-specific, cryptic dendronotoid nudibranch species (Mollusca: Gastropoda) from Australia including a new species description. Zool J Linn Soc 94:39–63CrossRefGoogle Scholar

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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