Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘Globigerinoides’, and description of the new genus Trilobatus
Planktonic foraminifera are one of the most abundant and diverse protists in the oceans. Their utility as paleo proxies requires rigorous taxonomy and comparison with living and genetically related counterparts. We merge genetic and fossil evidence of “Globigerinoides”, characterized by supplementar...
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ftreroch:oai:doc.rero.ch:20150929114001-BF 2023-05-15T18:00:46+02:00 Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘Globigerinoides’, and description of the new genus Trilobatus Spezzaferri, Silvia Kucera, Michal Pearson, Paul Nicholas Wade, Bridget Susan Rappo, Sacha Poole, Christopher Robert Morard, Raphaël Stalder, Claudio 2015-09-29T09:42:33Z http://www.plosone.org/article/Related/info:doi/10.1371/journal.pone.0128108 http://doc.rero.ch/record/257204/files/spe_fge.pdf eng eng http://www.plosone.org/article/Related/info:doi/10.1371/journal.pone.0128108 http://doc.rero.ch/record/257204/files/spe_fge.pdf 2015 ftreroch 2023-02-16T17:26:28Z Planktonic foraminifera are one of the most abundant and diverse protists in the oceans. Their utility as paleo proxies requires rigorous taxonomy and comparison with living and genetically related counterparts. We merge genetic and fossil evidence of “Globigerinoides”, characterized by supplementary apertures on spiral side, in a new approach to trace their “total evidence phylogeny” since their first appearance in the latest Paleogene. Combined fossil and molecular genetic data indicate that this genus, as traditionally understood, is polyphyletic. Both datasets indicate the existence of two distinct lineages that evolved independently. One group includes “Globigerinoides” trilobus and its descendants, the extant “Globigerinoides” sacculifer, Orbulina universa and Sphaeroidinella dehiscens. The second group includes the Globigerinoides ruber clade with the extant G. conglobatus and G. elongatus and ancestors. In molecular phylogenies, the trilobus group is not the sister taxon of the ruber group. The ruber group clusters consistently together with the modern Globoturborotalita rubescens as a sister taxon. The re-analysis of the fossil record indicates that the first “Globigerinoides” in the late Oligocene are ancestral to the trilobus group, whereas the ruber group first appeared at the base of the Miocene with representatives distinct from the trilobus group. Therefore, polyphyly of the genus "Globigerinoides" as currently defined can only be avoided either by broadening the genus concept to include G. rubescens and a large number of fossil species without supplementary apertures, or if the trilobus group is assigned to a separate genus. Since the former is not feasible due to the lack of a clear diagnosis for such a broad genus, we erect a new genus Trilobatus for the trilobus group (type species Globigerina triloba Reuss) and amend Globoturborotalita and Globigerinoides to clarify morphology and wall textures of these genera. In the new concept, Trilobatus n. gen. is paraphyletic and gave rise to the ... Other/Unknown Material Planktonic foraminifera RERO DOC Digital Library |
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Open Polar |
collection |
RERO DOC Digital Library |
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ftreroch |
language |
English |
description |
Planktonic foraminifera are one of the most abundant and diverse protists in the oceans. Their utility as paleo proxies requires rigorous taxonomy and comparison with living and genetically related counterparts. We merge genetic and fossil evidence of “Globigerinoides”, characterized by supplementary apertures on spiral side, in a new approach to trace their “total evidence phylogeny” since their first appearance in the latest Paleogene. Combined fossil and molecular genetic data indicate that this genus, as traditionally understood, is polyphyletic. Both datasets indicate the existence of two distinct lineages that evolved independently. One group includes “Globigerinoides” trilobus and its descendants, the extant “Globigerinoides” sacculifer, Orbulina universa and Sphaeroidinella dehiscens. The second group includes the Globigerinoides ruber clade with the extant G. conglobatus and G. elongatus and ancestors. In molecular phylogenies, the trilobus group is not the sister taxon of the ruber group. The ruber group clusters consistently together with the modern Globoturborotalita rubescens as a sister taxon. The re-analysis of the fossil record indicates that the first “Globigerinoides” in the late Oligocene are ancestral to the trilobus group, whereas the ruber group first appeared at the base of the Miocene with representatives distinct from the trilobus group. Therefore, polyphyly of the genus "Globigerinoides" as currently defined can only be avoided either by broadening the genus concept to include G. rubescens and a large number of fossil species without supplementary apertures, or if the trilobus group is assigned to a separate genus. Since the former is not feasible due to the lack of a clear diagnosis for such a broad genus, we erect a new genus Trilobatus for the trilobus group (type species Globigerina triloba Reuss) and amend Globoturborotalita and Globigerinoides to clarify morphology and wall textures of these genera. In the new concept, Trilobatus n. gen. is paraphyletic and gave rise to the ... |
author |
Spezzaferri, Silvia Kucera, Michal Pearson, Paul Nicholas Wade, Bridget Susan Rappo, Sacha Poole, Christopher Robert Morard, Raphaël Stalder, Claudio |
spellingShingle |
Spezzaferri, Silvia Kucera, Michal Pearson, Paul Nicholas Wade, Bridget Susan Rappo, Sacha Poole, Christopher Robert Morard, Raphaël Stalder, Claudio Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘Globigerinoides’, and description of the new genus Trilobatus |
author_facet |
Spezzaferri, Silvia Kucera, Michal Pearson, Paul Nicholas Wade, Bridget Susan Rappo, Sacha Poole, Christopher Robert Morard, Raphaël Stalder, Claudio |
author_sort |
Spezzaferri, Silvia |
title |
Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘Globigerinoides’, and description of the new genus Trilobatus |
title_short |
Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘Globigerinoides’, and description of the new genus Trilobatus |
title_full |
Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘Globigerinoides’, and description of the new genus Trilobatus |
title_fullStr |
Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘Globigerinoides’, and description of the new genus Trilobatus |
title_full_unstemmed |
Fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘Globigerinoides’, and description of the new genus Trilobatus |
title_sort |
fossil and genetic evidence for the polyphyletic nature of the planktonic foraminifera ‘globigerinoides’, and description of the new genus trilobatus |
publishDate |
2015 |
url |
http://www.plosone.org/article/Related/info:doi/10.1371/journal.pone.0128108 http://doc.rero.ch/record/257204/files/spe_fge.pdf |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
http://www.plosone.org/article/Related/info:doi/10.1371/journal.pone.0128108 http://doc.rero.ch/record/257204/files/spe_fge.pdf |
_version_ |
1766169982961451008 |