Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island
Among nudibranch molluscs, the family Tritoniidae gathers taxa with an uncertain phylogenetic position, such as some species of the genus Tritonia Cuvier, 1798. Currently, 37 valid species belong to this genus and only three of them are found in the Southern Ocean, namely T. challengeriana Bergh, 18...
Published in: | Polar Biology |
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Language: | English |
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2021
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Online Access: | https://hdl.handle.net/1983/9b0213a6-1130-4d5a-96d0-8b4db6c263ca https://research-information.bris.ac.uk/en/publications/9b0213a6-1130-4d5a-96d0-8b4db6c263ca https://doi.org/10.1007/s00300-021-02813-8 https://research-information.bris.ac.uk/ws/files/275450270/Full_text_PDF_final_published_version_.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/9b0213a6-1130-4d5a-96d0-8b4db6c263ca 2024-02-04T09:53:12+01:00 Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island Rossi, Maria Eleonora Avila, Conxita Moles, Juan 2021-03 application/pdf https://hdl.handle.net/1983/9b0213a6-1130-4d5a-96d0-8b4db6c263ca https://research-information.bris.ac.uk/en/publications/9b0213a6-1130-4d5a-96d0-8b4db6c263ca https://doi.org/10.1007/s00300-021-02813-8 https://research-information.bris.ac.uk/ws/files/275450270/Full_text_PDF_final_published_version_.pdf eng eng info:eu-repo/semantics/openAccess Rossi , M E , Avila , C & Moles , J 2021 , ' Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island ' , Polar Biology , vol. 44 , no. 3 , pp. 559-573 . https://doi.org/10.1007/s00300-021-02813-8 Antarctic Peninsula nudibranchs taxonomy and systematics article 2021 ftubristolcris https://doi.org/10.1007/s00300-021-02813-8 2024-01-05T00:01:06Z Among nudibranch molluscs, the family Tritoniidae gathers taxa with an uncertain phylogenetic position, such as some species of the genus Tritonia Cuvier, 1798. Currently, 37 valid species belong to this genus and only three of them are found in the Southern Ocean, namely T. challengeriana Bergh, 1884, T. dantarti Ballesteros & Avila, 2006, and T. vorax (Odhner, 1926). In this study, we shed light on the long-term discussed systematics and taxonomy of Antarctic Tritonia species using morpho-anatomical and molecular techniques. Samples from the Weddell Sea and Bouvet Island were dissected and prepared for scanning electron microscopy. The three molecular markers COI, 16S, and H3 were sequenced and analysed through maximum-likelihood and Bayesian methods. The phylogenetic analyses and species delimitation tests clearly distinguished two species, T. challengeriana widely spread in the Southern Ocean and T. dantarti endemic to Bouvet Island. Colouration seems to be an unreliable character to differentiate among species since molecular data revealed both species can either have orange or white colour morphotypes. This variability could be explained by pigment sequestration from the soft coral species they feed on. Morphological analyses reveal differences between Antarctic and Magellanic specimens of T. challengeriana. However, the relationship between T. challengeriana specimens from these two regions remains still unclear due to the lack of molecular data. Therefore, the validity of the T. antarctica Martens & Pfeffer, 1886, exclusively found in Antarctic waters requires further systematic work. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Bouvet Island Polar Biology Southern Ocean Weddell Sea University of Bristol: Bristol Research Antarctic Antarctic Peninsula Bouvet ENVELOPE(3.358,3.358,-54.422,-54.422) Bouvet Island ENVELOPE(3.358,3.358,-54.422,-54.422) Southern Ocean Weddell Weddell Sea Polar Biology 44 3 559 573 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
Antarctic Peninsula nudibranchs taxonomy and systematics |
spellingShingle |
Antarctic Peninsula nudibranchs taxonomy and systematics Rossi, Maria Eleonora Avila, Conxita Moles, Juan Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island |
topic_facet |
Antarctic Peninsula nudibranchs taxonomy and systematics |
description |
Among nudibranch molluscs, the family Tritoniidae gathers taxa with an uncertain phylogenetic position, such as some species of the genus Tritonia Cuvier, 1798. Currently, 37 valid species belong to this genus and only three of them are found in the Southern Ocean, namely T. challengeriana Bergh, 1884, T. dantarti Ballesteros & Avila, 2006, and T. vorax (Odhner, 1926). In this study, we shed light on the long-term discussed systematics and taxonomy of Antarctic Tritonia species using morpho-anatomical and molecular techniques. Samples from the Weddell Sea and Bouvet Island were dissected and prepared for scanning electron microscopy. The three molecular markers COI, 16S, and H3 were sequenced and analysed through maximum-likelihood and Bayesian methods. The phylogenetic analyses and species delimitation tests clearly distinguished two species, T. challengeriana widely spread in the Southern Ocean and T. dantarti endemic to Bouvet Island. Colouration seems to be an unreliable character to differentiate among species since molecular data revealed both species can either have orange or white colour morphotypes. This variability could be explained by pigment sequestration from the soft coral species they feed on. Morphological analyses reveal differences between Antarctic and Magellanic specimens of T. challengeriana. However, the relationship between T. challengeriana specimens from these two regions remains still unclear due to the lack of molecular data. Therefore, the validity of the T. antarctica Martens & Pfeffer, 1886, exclusively found in Antarctic waters requires further systematic work. |
format |
Article in Journal/Newspaper |
author |
Rossi, Maria Eleonora Avila, Conxita Moles, Juan |
author_facet |
Rossi, Maria Eleonora Avila, Conxita Moles, Juan |
author_sort |
Rossi, Maria Eleonora |
title |
Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island |
title_short |
Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island |
title_full |
Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island |
title_fullStr |
Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island |
title_full_unstemmed |
Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island |
title_sort |
orange is the new white: taxonomic revision of tritonia species (gastropoda: nudibranchia) from the weddell sea and bouvet island |
publishDate |
2021 |
url |
https://hdl.handle.net/1983/9b0213a6-1130-4d5a-96d0-8b4db6c263ca https://research-information.bris.ac.uk/en/publications/9b0213a6-1130-4d5a-96d0-8b4db6c263ca https://doi.org/10.1007/s00300-021-02813-8 https://research-information.bris.ac.uk/ws/files/275450270/Full_text_PDF_final_published_version_.pdf |
long_lat |
ENVELOPE(3.358,3.358,-54.422,-54.422) ENVELOPE(3.358,3.358,-54.422,-54.422) |
geographic |
Antarctic Antarctic Peninsula Bouvet Bouvet Island Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Bouvet Bouvet Island Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Bouvet Island Polar Biology Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Bouvet Island Polar Biology Southern Ocean Weddell Sea |
op_source |
Rossi , M E , Avila , C & Moles , J 2021 , ' Orange is the new white: taxonomic revision of Tritonia species (Gastropoda: Nudibranchia) from the Weddell Sea and Bouvet Island ' , Polar Biology , vol. 44 , no. 3 , pp. 559-573 . https://doi.org/10.1007/s00300-021-02813-8 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00300-021-02813-8 |
container_title |
Polar Biology |
container_volume |
44 |
container_issue |
3 |
container_start_page |
559 |
op_container_end_page |
573 |
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1789964693452881920 |