An ancient, Antarctic-specific species complex: large divergences between multiple Antarctic lineages of the tardigrade genus Mesobiotus
Antarctica has been isolated and progressively glaciated for over 30 million years, with only approximately 0.3 % of its area currently ice-free and capable of supporting terrestrial ecosystems. As a result, invertebrate populations have become isolated and fragmented, in some cases leading to speci...
Published in: | Molecular Phylogenetics and Evolution |
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Online Access: | https://hdl.handle.net/2440/137665 https://doi.org/10.1016/j.ympev.2022.107429 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/137665 2023-12-17T10:20:14+01:00 An ancient, Antarctic-specific species complex: large divergences between multiple Antarctic lineages of the tardigrade genus Mesobiotus Short, K.A. Sands, C.J. McInnes, S.J. Pisani, D. Stevens, M.I. Convey, P. 2022 application/pdf https://hdl.handle.net/2440/137665 https://doi.org/10.1016/j.ympev.2022.107429 en eng Elsevier BV http://purl.org/au-research/grants/arc/SR200100005 Molecular Phylogenetics and Evolution, 2022; 170:107429-107429 1055-7903 1095-9513 https://hdl.handle.net/2440/137665 doi:10.1016/j.ympev.2022.107429 Stevens, M.I. [0000-0003-1505-1639] © 2022 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). http://dx.doi.org/10.1016/j.ympev.2022.107429 Animals Ecosystem Phylogeny Antarctic Regions Arctic Regions Tardigrada Journal article 2022 ftunivadelaidedl https://doi.org/10.1016/j.ympev.2022.107429 2023-11-20T23:26:52Z Antarctica has been isolated and progressively glaciated for over 30 million years, with only approximately 0.3 % of its area currently ice-free and capable of supporting terrestrial ecosystems. As a result, invertebrate populations have become isolated and fragmented, in some cases leading to speciation. Terrestrial invertebrate species currently found in Antarctica often show multi-million year, and even Gondwanan, heritage, with little evidence of recent colonisation. Mesobiotus is a globally distributed tardigrade genus. It has commonly been divided into two "groups", referred to as harmsworthi and furciger, with both groups currently considered cosmopolitan, with global reports including from both the Arctic and the Antarctic. However, some authors considered that Meb. furciger, as originally described, may represent an Antarctic-specific lineage. Using collections of tardigrades from across the Antarctic continent and publicly available sequences obtained from online databases, we use mitochondrial and nuclear ribosomal sequence data to clarify the relationships of Antarctic Mesobiotus species. Our analyses show that all Antarctic members belong to a single lineage, evolving separately from non-Antarctic representatives. Within this Antarctic lineage there are further deep divisions among geographic regions of the continent, consistent with the presence of a species complex. Based on our data confirming the deep divisions between this Antarctic lineage, which includes representatives of both groups, we recommend that the use of furciger and harmsworthi group terminology is now abandoned, as it leads to systematic and biogeographical confusion. K.A. Short, C.J. Sands, S.J. McInnes, D. Pisani, M.I. Stevens, P. Convey Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Tardigrade The University of Adelaide: Digital Library Antarctic Arctic The Antarctic Molecular Phylogenetics and Evolution 170 107429 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Animals Ecosystem Phylogeny Antarctic Regions Arctic Regions Tardigrada |
spellingShingle |
Animals Ecosystem Phylogeny Antarctic Regions Arctic Regions Tardigrada Short, K.A. Sands, C.J. McInnes, S.J. Pisani, D. Stevens, M.I. Convey, P. An ancient, Antarctic-specific species complex: large divergences between multiple Antarctic lineages of the tardigrade genus Mesobiotus |
topic_facet |
Animals Ecosystem Phylogeny Antarctic Regions Arctic Regions Tardigrada |
description |
Antarctica has been isolated and progressively glaciated for over 30 million years, with only approximately 0.3 % of its area currently ice-free and capable of supporting terrestrial ecosystems. As a result, invertebrate populations have become isolated and fragmented, in some cases leading to speciation. Terrestrial invertebrate species currently found in Antarctica often show multi-million year, and even Gondwanan, heritage, with little evidence of recent colonisation. Mesobiotus is a globally distributed tardigrade genus. It has commonly been divided into two "groups", referred to as harmsworthi and furciger, with both groups currently considered cosmopolitan, with global reports including from both the Arctic and the Antarctic. However, some authors considered that Meb. furciger, as originally described, may represent an Antarctic-specific lineage. Using collections of tardigrades from across the Antarctic continent and publicly available sequences obtained from online databases, we use mitochondrial and nuclear ribosomal sequence data to clarify the relationships of Antarctic Mesobiotus species. Our analyses show that all Antarctic members belong to a single lineage, evolving separately from non-Antarctic representatives. Within this Antarctic lineage there are further deep divisions among geographic regions of the continent, consistent with the presence of a species complex. Based on our data confirming the deep divisions between this Antarctic lineage, which includes representatives of both groups, we recommend that the use of furciger and harmsworthi group terminology is now abandoned, as it leads to systematic and biogeographical confusion. K.A. Short, C.J. Sands, S.J. McInnes, D. Pisani, M.I. Stevens, P. Convey |
format |
Article in Journal/Newspaper |
author |
Short, K.A. Sands, C.J. McInnes, S.J. Pisani, D. Stevens, M.I. Convey, P. |
author_facet |
Short, K.A. Sands, C.J. McInnes, S.J. Pisani, D. Stevens, M.I. Convey, P. |
author_sort |
Short, K.A. |
title |
An ancient, Antarctic-specific species complex: large divergences between multiple Antarctic lineages of the tardigrade genus Mesobiotus |
title_short |
An ancient, Antarctic-specific species complex: large divergences between multiple Antarctic lineages of the tardigrade genus Mesobiotus |
title_full |
An ancient, Antarctic-specific species complex: large divergences between multiple Antarctic lineages of the tardigrade genus Mesobiotus |
title_fullStr |
An ancient, Antarctic-specific species complex: large divergences between multiple Antarctic lineages of the tardigrade genus Mesobiotus |
title_full_unstemmed |
An ancient, Antarctic-specific species complex: large divergences between multiple Antarctic lineages of the tardigrade genus Mesobiotus |
title_sort |
ancient, antarctic-specific species complex: large divergences between multiple antarctic lineages of the tardigrade genus mesobiotus |
publisher |
Elsevier BV |
publishDate |
2022 |
url |
https://hdl.handle.net/2440/137665 https://doi.org/10.1016/j.ympev.2022.107429 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Arctic Tardigrade |
genre_facet |
Antarc* Antarctic Antarctica Arctic Tardigrade |
op_source |
http://dx.doi.org/10.1016/j.ympev.2022.107429 |
op_relation |
http://purl.org/au-research/grants/arc/SR200100005 Molecular Phylogenetics and Evolution, 2022; 170:107429-107429 1055-7903 1095-9513 https://hdl.handle.net/2440/137665 doi:10.1016/j.ympev.2022.107429 Stevens, M.I. [0000-0003-1505-1639] |
op_rights |
© 2022 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
op_doi |
https://doi.org/10.1016/j.ympev.2022.107429 |
container_title |
Molecular Phylogenetics and Evolution |
container_volume |
170 |
container_start_page |
107429 |
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1785590130948440064 |