Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis
Phylogeography of animals provides clues to processes governing their evolution and diversification. The Indian Ocean has been hypothesized as a ‘dispersal corridor’ connecting hydrothermal vent fauna of Atlantic and Pacific oceans. Stalked barnacles of the family Eolepadidae are common associates o...
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crroyalsociety:10.1098/rsos.172408 2024-06-23T07:56:56+00:00 Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis Watanabe, Hiromi Kayama Chen, Chong Marie, Daniel P. Takai, Ken Fujikura, Katsunori Chan, Benny K. K. JSPS KAKENHI 2018 http://dx.doi.org/10.1098/rsos.172408 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.172408 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.172408 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Royal Society Open Science volume 5, issue 4, page 172408 ISSN 2054-5703 journal-article 2018 crroyalsociety https://doi.org/10.1098/rsos.172408 2024-06-04T06:23:09Z Phylogeography of animals provides clues to processes governing their evolution and diversification. The Indian Ocean has been hypothesized as a ‘dispersal corridor’ connecting hydrothermal vent fauna of Atlantic and Pacific oceans. Stalked barnacles of the family Eolepadidae are common associates of deep-sea vents in Southern, Pacific and Indian oceans, and the family is an ideal group for testing this hypothesis. Here, we describe Neolepas marisindica sp. nov. from the Indian Ocean, distinguished from N. zevinae and N. rapanuii by having a tridentoid mandible in which the second tooth lacks small elongated teeth. Morphological variations suggest that environmental differences result in phenotypic plasticity in the capitulum and scales on the peduncle in eolepadids. We suggest that diagnostic characters in Eolepadidae should be based mainly on more reliable arthropodal characters and DNA barcoding, while the plate arrangement should be used carefully with their intraspecific variation in mind. We show morphologically that Neolepas specimens collected from the South West Indian Ridge, the South East Indian Ridge and the Central Indian Ridge belong to the new species. Molecular phylogeny and fossil evidence indicated that Neolepas migrated from the southern Pacific to the Indian Ocean through the Southern Ocean, providing key evidence against the ‘dispersal corridor’ hypothesis. Exploration of the South East Indian Ridge is urgently required to understand vent biogeography in the Indian Ocean. Article in Journal/Newspaper Southern Ocean The Royal Society Indian Pacific Southern Ocean Royal Society Open Science 5 4 172408 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
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English |
description |
Phylogeography of animals provides clues to processes governing their evolution and diversification. The Indian Ocean has been hypothesized as a ‘dispersal corridor’ connecting hydrothermal vent fauna of Atlantic and Pacific oceans. Stalked barnacles of the family Eolepadidae are common associates of deep-sea vents in Southern, Pacific and Indian oceans, and the family is an ideal group for testing this hypothesis. Here, we describe Neolepas marisindica sp. nov. from the Indian Ocean, distinguished from N. zevinae and N. rapanuii by having a tridentoid mandible in which the second tooth lacks small elongated teeth. Morphological variations suggest that environmental differences result in phenotypic plasticity in the capitulum and scales on the peduncle in eolepadids. We suggest that diagnostic characters in Eolepadidae should be based mainly on more reliable arthropodal characters and DNA barcoding, while the plate arrangement should be used carefully with their intraspecific variation in mind. We show morphologically that Neolepas specimens collected from the South West Indian Ridge, the South East Indian Ridge and the Central Indian Ridge belong to the new species. Molecular phylogeny and fossil evidence indicated that Neolepas migrated from the southern Pacific to the Indian Ocean through the Southern Ocean, providing key evidence against the ‘dispersal corridor’ hypothesis. Exploration of the South East Indian Ridge is urgently required to understand vent biogeography in the Indian Ocean. |
author2 |
JSPS KAKENHI |
format |
Article in Journal/Newspaper |
author |
Watanabe, Hiromi Kayama Chen, Chong Marie, Daniel P. Takai, Ken Fujikura, Katsunori Chan, Benny K. K. |
spellingShingle |
Watanabe, Hiromi Kayama Chen, Chong Marie, Daniel P. Takai, Ken Fujikura, Katsunori Chan, Benny K. K. Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis |
author_facet |
Watanabe, Hiromi Kayama Chen, Chong Marie, Daniel P. Takai, Ken Fujikura, Katsunori Chan, Benny K. K. |
author_sort |
Watanabe, Hiromi Kayama |
title |
Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis |
title_short |
Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis |
title_full |
Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis |
title_fullStr |
Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis |
title_full_unstemmed |
Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis |
title_sort |
phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the indian ocean ‘dispersal corridor’ hypothesis |
publisher |
The Royal Society |
publishDate |
2018 |
url |
http://dx.doi.org/10.1098/rsos.172408 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.172408 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.172408 |
geographic |
Indian Pacific Southern Ocean |
geographic_facet |
Indian Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Royal Society Open Science volume 5, issue 4, page 172408 ISSN 2054-5703 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsos.172408 |
container_title |
Royal Society Open Science |
container_volume |
5 |
container_issue |
4 |
container_start_page |
172408 |
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1802650333159096320 |