Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean
Eight SSU rDNA genetic types have been described in the planktonic foraminifera Neogloboquadrina pachyderma, but the level of correlation between genetic diversity and morphological variation remains unknown in this morphospecies. In this study, we combine molecular and morphometric analyses of spec...
Published in: | Marine Micropaleontology |
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Language: | English |
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ftpubman:oai:pure.mpg.de:item_3028290 2023-08-20T04:08:01+02:00 Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean Andre, A. Quillevere, F. Schiebel, R. Morard, R. Howa, H. Meilland, J. Douady, C. 2018 http://hdl.handle.net/21.11116/0000-0003-06F9-E eng eng info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marmicro.2018.10.001 http://hdl.handle.net/21.11116/0000-0003-06F9-E Marine Micropaleontology info:eu-repo/semantics/article 2018 ftpubman https://doi.org/10.1016/j.marmicro.2018.10.001 2023-08-01T23:48:53Z Eight SSU rDNA genetic types have been described in the planktonic foraminifera Neogloboquadrina pachyderma, but the level of correlation between genetic diversity and morphological variation remains unknown in this morphospecies. In this study, we combine molecular and morphometric analyses of specimens of N. pachyderma sampled during two consecutive years across a latitudinal gradient in the Indian sector of the Southern Ocean. We observe that three genetic types of N. pachyderma inhabit the (sub-)polar waters of the southern Indian Ocean where they have equivalent regional distributions to those previously observed in the South Atlantic. The geographic ranges of these genetic types are largely overlapping. Our morphometric data show that contrary to other planktonic foraminiferal morphospecies, there is no relationship between genetic diversity and morphological differentiation in at least two of the austral representatives of N. pachyderma (Type III and Type IV) despite a high morphological variability and large genetic distance between these types. These genetic types of N. pachyderma in the southern Indian Ocean thus constitute true cryptic species of planktonic foraminifera. Article in Journal/Newspaper Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean Max Planck Society: MPG.PuRe Austral Indian Southern Ocean Marine Micropaleontology 144 14 24 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
Eight SSU rDNA genetic types have been described in the planktonic foraminifera Neogloboquadrina pachyderma, but the level of correlation between genetic diversity and morphological variation remains unknown in this morphospecies. In this study, we combine molecular and morphometric analyses of specimens of N. pachyderma sampled during two consecutive years across a latitudinal gradient in the Indian sector of the Southern Ocean. We observe that three genetic types of N. pachyderma inhabit the (sub-)polar waters of the southern Indian Ocean where they have equivalent regional distributions to those previously observed in the South Atlantic. The geographic ranges of these genetic types are largely overlapping. Our morphometric data show that contrary to other planktonic foraminiferal morphospecies, there is no relationship between genetic diversity and morphological differentiation in at least two of the austral representatives of N. pachyderma (Type III and Type IV) despite a high morphological variability and large genetic distance between these types. These genetic types of N. pachyderma in the southern Indian Ocean thus constitute true cryptic species of planktonic foraminifera. |
format |
Article in Journal/Newspaper |
author |
Andre, A. Quillevere, F. Schiebel, R. Morard, R. Howa, H. Meilland, J. Douady, C. |
spellingShingle |
Andre, A. Quillevere, F. Schiebel, R. Morard, R. Howa, H. Meilland, J. Douady, C. Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean |
author_facet |
Andre, A. Quillevere, F. Schiebel, R. Morard, R. Howa, H. Meilland, J. Douady, C. |
author_sort |
Andre, A. |
title |
Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean |
title_short |
Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean |
title_full |
Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean |
title_fullStr |
Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean |
title_full_unstemmed |
Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean |
title_sort |
disconnection between genetic and morphological diversity in the planktonic foraminifer neogloboquadrina pachyderma from the indian sector of the southern ocean |
publishDate |
2018 |
url |
http://hdl.handle.net/21.11116/0000-0003-06F9-E |
geographic |
Austral Indian Southern Ocean |
geographic_facet |
Austral Indian Southern Ocean |
genre |
Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean |
genre_facet |
Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean |
op_source |
Marine Micropaleontology |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marmicro.2018.10.001 http://hdl.handle.net/21.11116/0000-0003-06F9-E |
op_doi |
https://doi.org/10.1016/j.marmicro.2018.10.001 |
container_title |
Marine Micropaleontology |
container_volume |
144 |
container_start_page |
14 |
op_container_end_page |
24 |
_version_ |
1774720056180080640 |