Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae)
Abstract The central peaks of the isolated island of St Helena (south Atlantic Ocean) are home to an extraordinary set of ground beetles of the tribe Bembidiini, which belong to three endemic genus-group taxa. These beetles are strikingly different in overall body form from the many bembidiines foun...
Published in: | Zoological Journal of the Linnean Society |
---|---|
Main Authors: | , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press (OUP)
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1093/zoolinnean/zlz150 http://academic.oup.com/zoolinnean/article-pdf/189/4/1155/33559769/zlz150.pdf |
id |
croxfordunivpr:10.1093/zoolinnean/zlz150 |
---|---|
record_format |
openpolar |
spelling |
croxfordunivpr:10.1093/zoolinnean/zlz150 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 R Sproul, John S Mendel, Howard Oregon State University 2019 http://dx.doi.org/10.1093/zoolinnean/zlz150 http://academic.oup.com/zoolinnean/article-pdf/189/4/1155/33559769/zlz150.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Zoological Journal of the Linnean Society volume 189, issue 4, page 1155-1175 ISSN 0024-4082 1096-3642 journal-article 2019 croxfordunivpr https://doi.org/10.1093/zoolinnean/zlz150 2024-07-29T04:22:26Z Abstract The central peaks of the isolated island of St Helena (south Atlantic Ocean) are home to an extraordinary set of ground beetles of the tribe Bembidiini, which 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 to be extinct, and all are threatened by habitat destruction and invasive species. Through next-generation sequencing of historical museum specimens, we examine the phylogenetic relationships of the St Helena fauna. We find that, in spite of their morphological disparities, the endemic bembidiines of St Helena form a clade of genetically similar species, with their sister group being Bembidion alsium from the Indian Ocean island of La RĂ©union, and the sister group of this pair being 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 B. alsium. Given that the St Helena Peaks Bembidion are deeply nested in the genus Bembidion, we move the three taxa back in that genus as subgenera and provide a new name (Bembidion shepherdae) for the now-homonymous Bembidion wollastoni. Article in Journal/Newspaper South Atlantic Ocean Ocean Island Oxford University Press Zoological Journal of the Linnean Society 189 4 1155 1175 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
Abstract The central peaks of the isolated island of St Helena (south Atlantic Ocean) are home to an extraordinary set of ground beetles of the tribe Bembidiini, which 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 to be extinct, and all are threatened by habitat destruction and invasive species. Through next-generation sequencing of historical museum specimens, we examine the phylogenetic relationships of the St Helena fauna. We find that, in spite of their morphological disparities, the endemic bembidiines of St Helena form a clade of genetically similar species, with their sister group being Bembidion alsium from the Indian Ocean island of La RĂ©union, and the sister group of this pair being 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 B. alsium. Given that the St Helena Peaks Bembidion are deeply nested in the genus Bembidion, we move the three taxa back in that genus as subgenera and provide a new name (Bembidion shepherdae) for the now-homonymous Bembidion wollastoni. |
author2 |
Oregon State University |
format |
Article in Journal/Newspaper |
author |
Maddison, David R Sproul, John S Mendel, Howard |
spellingShingle |
Maddison, David R Sproul, John S Mendel, Howard Origin and adaptive radiation of the exceptional and threatened bembidiine beetle fauna of St Helena (Coleoptera: Carabidae) |
author_facet |
Maddison, David R Sproul, John S Mendel, Howard |
author_sort |
Maddison, David R |
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 |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/zoolinnean/zlz150 http://academic.oup.com/zoolinnean/article-pdf/189/4/1155/33559769/zlz150.pdf |
genre |
South Atlantic Ocean Ocean Island |
genre_facet |
South Atlantic Ocean Ocean Island |
op_source |
Zoological Journal of the Linnean Society volume 189, issue 4, page 1155-1175 ISSN 0024-4082 1096-3642 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/zoolinnean/zlz150 |
container_title |
Zoological Journal of the Linnean Society |
container_volume |
189 |
container_issue |
4 |
container_start_page |
1155 |
op_container_end_page |
1175 |
_version_ |
1810480133829558272 |