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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ftdoajarticles:oai:doaj.org/article:c41ca6b4f0ee4ab9aeeb6cbd43da99eb 2023-05-15T18:25:37+02:00 Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis Hiromi Kayama Watanabe Chong Chen Daniel P. Marie Ken Takai Katsunori Fujikura Benny K. K. Chan 2018-01-01T00:00:00Z https://doi.org/10.1098/rsos.172408 https://doaj.org/article/c41ca6b4f0ee4ab9aeeb6cbd43da99eb EN eng The Royal Society https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.172408 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.172408 https://doaj.org/article/c41ca6b4f0ee4ab9aeeb6cbd43da99eb Royal Society Open Science, Vol 5, Iss 4 (2018) chemosynthesis-based ecosystem eolepadidae neolepas Science Q article 2018 ftdoajarticles https://doi.org/10.1098/rsos.172408 2022-12-31T13:57:13Z 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 Directory of Open Access Journals: DOAJ Articles Southern Ocean Pacific Indian Royal Society Open Science 5 4 172408 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
chemosynthesis-based ecosystem eolepadidae neolepas Science Q |
spellingShingle |
chemosynthesis-based ecosystem eolepadidae neolepas Science Q Hiromi Kayama Watanabe Chong Chen Daniel P. Marie Ken Takai Katsunori Fujikura Benny K. K. Chan Phylogeography of hydrothermal vent stalked barnacles: a new species fills a gap in the Indian Ocean ‘dispersal corridor’ hypothesis |
topic_facet |
chemosynthesis-based ecosystem eolepadidae neolepas Science Q |
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. |
format |
Article in Journal/Newspaper |
author |
Hiromi Kayama Watanabe Chong Chen Daniel P. Marie Ken Takai Katsunori Fujikura Benny K. K. Chan |
author_facet |
Hiromi Kayama Watanabe Chong Chen Daniel P. Marie Ken Takai Katsunori Fujikura Benny K. K. Chan |
author_sort |
Hiromi Kayama Watanabe |
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 |
https://doi.org/10.1098/rsos.172408 https://doaj.org/article/c41ca6b4f0ee4ab9aeeb6cbd43da99eb |
geographic |
Southern Ocean Pacific Indian |
geographic_facet |
Southern Ocean Pacific Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Royal Society Open Science, Vol 5, Iss 4 (2018) |
op_relation |
https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.172408 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.172408 https://doaj.org/article/c41ca6b4f0ee4ab9aeeb6cbd43da99eb |
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 |
_version_ |
1766207196381577216 |