Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae)
The central peaks of the isolated island of St Helena (in the south Atlantic Ocean) are home to an extraordinary set of ground beetles of the tribe Bembidiini, and belong to three endemic genus-group taxa. These beetles are strikingly different in overall body form from the many bembidiines found el...
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ftzenodo:oai:zenodo.org:4942165 2024-09-15T18:36:28+00:00 Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae) Maddison, David Sproul, John Mendel, Howard 2019-10-13 https://doi.org/10.5061/dryad.n5tb2rbrh unknown Zenodo https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.n5tb2rbrh oai:zenodo.org:4942165 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode info:eu-repo/semantics/other 2019 ftzenodo https://doi.org/10.5061/dryad.n5tb2rbrh 2024-07-26T11:34:43Z The central peaks of the isolated island of St Helena (in the south Atlantic Ocean) are home to an extraordinary set of ground beetles of the tribe Bembidiini, and belong to three endemic genus-group taxa. These beetles are strikingly different in overall body form from the many bembidiines found elsewhere in the world. At least some of the St Helena species are likely extinct, and all are threatened by habitat destruction and invasive species. Through next-generation sequencing of old museum specimens, we examine the phylogenetic relationships of the St Helena fauna. We find that, in spite of their morphological disparities, the endemic St Helena bembidiines form a clade of genetically very similar species, their sister group is Bembidion alsium from the island of La RĂ©union (east of Madagascar), and the sister group of this pair is the African subgenus Omotaphus . We propose that the St Helena Peaks Bembidion are an adaptive radiation that arose from a single dispersal event to St Helena from a now-extinct African lineage (sister to Omotaphus ), and that this extinct lineage also served as the ancestral source of Bembidion alsium . As the St Helena Peaks Bembidion are deeply nested within the genus Bembidion , we move the three taxa back within that genus as subgenera, and provide a new name ( Bembidion shepherdae ) for the now-homonymous Bembidion wollastoni . Other/Unknown Material South Atlantic Ocean Zenodo |
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The central peaks of the isolated island of St Helena (in the south Atlantic Ocean) are home to an extraordinary set of ground beetles of the tribe Bembidiini, and belong to three endemic genus-group taxa. These beetles are strikingly different in overall body form from the many bembidiines found elsewhere in the world. At least some of the St Helena species are likely extinct, and all are threatened by habitat destruction and invasive species. Through next-generation sequencing of old museum specimens, we examine the phylogenetic relationships of the St Helena fauna. We find that, in spite of their morphological disparities, the endemic St Helena bembidiines form a clade of genetically very similar species, their sister group is Bembidion alsium from the island of La RĂ©union (east of Madagascar), and the sister group of this pair is the African subgenus Omotaphus . We propose that the St Helena Peaks Bembidion are an adaptive radiation that arose from a single dispersal event to St Helena from a now-extinct African lineage (sister to Omotaphus ), and that this extinct lineage also served as the ancestral source of Bembidion alsium . As the St Helena Peaks Bembidion are deeply nested within the genus Bembidion , we move the three taxa back within that genus as subgenera, and provide a new name ( Bembidion shepherdae ) for the now-homonymous Bembidion wollastoni . |
format |
Other/Unknown Material |
author |
Maddison, David Sproul, John Mendel, Howard |
spellingShingle |
Maddison, David Sproul, John Mendel, Howard Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae) |
author_facet |
Maddison, David Sproul, John Mendel, Howard |
author_sort |
Maddison, David |
title |
Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae) |
title_short |
Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae) |
title_full |
Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae) |
title_fullStr |
Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae) |
title_full_unstemmed |
Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae) |
title_sort |
origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of st helena (coleoptera: carabidae) |
publisher |
Zenodo |
publishDate |
2019 |
url |
https://doi.org/10.5061/dryad.n5tb2rbrh |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.n5tb2rbrh oai:zenodo.org:4942165 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.n5tb2rbrh |
_version_ |
1810480129288175616 |