Revalidation of the genus Chiloguembelitria Hofker: Implications for the evolution of early Danian planktonic foraminifera
Guembelitria is the only planktonic foraminiferal genus whose survival from the mass extinction event of the Cretaceous/Paleogene (K/Pg) boundary has been clearly proven. The evolution of Guembelitria after the K/Pg boundary led to the appearance of two guembelitriid lineages in the early Danian: on...
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ftunivzaraaneto:oai:zaguan.unizar.es:71105 2023-05-15T18:00:52+02:00 Revalidation of the genus Chiloguembelitria Hofker: Implications for the evolution of early Danian planktonic foraminifera Arenillas, Ignacio Arz, José A. Gilabert, Vicente 2017 application/pdf http://zaguan.unizar.es/record/71105 https://doi.org/10.1016/j.jafrearsci.2017.07.011 eng eng info:eu-repo/grantAgreement/ES/DGA/E05 info:eu-repo/grantAgreement/ES/MINECO/CGL2015-64422-P info:eu-repo/grantAgreement/ES/UZ/UZ2015-CIE-02 http://zaguan.unizar.es/record/71105 doi:10.1016/j.jafrearsci.2017.07.011 by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ CC-BY-NC-ND info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 2017 ftunivzaraaneto https://doi.org/10.1016/j.jafrearsci.2017.07.011 2022-03-10T16:35:29Z Guembelitria is the only planktonic foraminiferal genus whose survival from the mass extinction event of the Cretaceous/Paleogene (K/Pg) boundary has been clearly proven. The evolution of Guembelitria after the K/Pg boundary led to the appearance of two guembelitriid lineages in the early Danian: one biserial, represented by Woodringina and culminating in Chiloguembelina, and the other trochospiral, represented by Trochoguembelitria and culminating in Globoconusa. We have re-examined the genus Chiloguembelitria, another guembelitriid descended from Guembelitria and whose taxonomic validity had been questioned, it being considered a junior synonym of the latter. Nevertheless, Chiloguembelitria differs from Guembelitria mainly in the wall texture (pustulate to rugose vs. pore-mounded) and the position of the aperture (umbilical-extraumbilical to extraumbilical vs. umbilical). Chiloguembelitria shares its wall texture with Trochoguembelitria and some of the earliest specimens of Woodringina, suggesting that it played an important role in the evolution of early Danian guembelitriids, as it seems to be the most immediate ancestor of both trochospiral and biserial lineages. Morphological and morphostatistical analyses of Chiloguembelitria discriminate at least five species: Chg. danica, Chg. irregularis, and three new species: Chg. hofkeri, Chg. trilobata and Chg. biseriata. Article in Journal/Newspaper Planktonic foraminifera Digital Repository of University of Zaragoza (ZAGUAN) Journal of African Earth Sciences 134 435 456 |
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Open Polar |
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Digital Repository of University of Zaragoza (ZAGUAN) |
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ftunivzaraaneto |
language |
English |
description |
Guembelitria is the only planktonic foraminiferal genus whose survival from the mass extinction event of the Cretaceous/Paleogene (K/Pg) boundary has been clearly proven. The evolution of Guembelitria after the K/Pg boundary led to the appearance of two guembelitriid lineages in the early Danian: one biserial, represented by Woodringina and culminating in Chiloguembelina, and the other trochospiral, represented by Trochoguembelitria and culminating in Globoconusa. We have re-examined the genus Chiloguembelitria, another guembelitriid descended from Guembelitria and whose taxonomic validity had been questioned, it being considered a junior synonym of the latter. Nevertheless, Chiloguembelitria differs from Guembelitria mainly in the wall texture (pustulate to rugose vs. pore-mounded) and the position of the aperture (umbilical-extraumbilical to extraumbilical vs. umbilical). Chiloguembelitria shares its wall texture with Trochoguembelitria and some of the earliest specimens of Woodringina, suggesting that it played an important role in the evolution of early Danian guembelitriids, as it seems to be the most immediate ancestor of both trochospiral and biserial lineages. Morphological and morphostatistical analyses of Chiloguembelitria discriminate at least five species: Chg. danica, Chg. irregularis, and three new species: Chg. hofkeri, Chg. trilobata and Chg. biseriata. |
format |
Article in Journal/Newspaper |
author |
Arenillas, Ignacio Arz, José A. Gilabert, Vicente |
spellingShingle |
Arenillas, Ignacio Arz, José A. Gilabert, Vicente Revalidation of the genus Chiloguembelitria Hofker: Implications for the evolution of early Danian planktonic foraminifera |
author_facet |
Arenillas, Ignacio Arz, José A. Gilabert, Vicente |
author_sort |
Arenillas, Ignacio |
title |
Revalidation of the genus Chiloguembelitria Hofker: Implications for the evolution of early Danian planktonic foraminifera |
title_short |
Revalidation of the genus Chiloguembelitria Hofker: Implications for the evolution of early Danian planktonic foraminifera |
title_full |
Revalidation of the genus Chiloguembelitria Hofker: Implications for the evolution of early Danian planktonic foraminifera |
title_fullStr |
Revalidation of the genus Chiloguembelitria Hofker: Implications for the evolution of early Danian planktonic foraminifera |
title_full_unstemmed |
Revalidation of the genus Chiloguembelitria Hofker: Implications for the evolution of early Danian planktonic foraminifera |
title_sort |
revalidation of the genus chiloguembelitria hofker: implications for the evolution of early danian planktonic foraminifera |
publishDate |
2017 |
url |
http://zaguan.unizar.es/record/71105 https://doi.org/10.1016/j.jafrearsci.2017.07.011 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
info:eu-repo/grantAgreement/ES/DGA/E05 info:eu-repo/grantAgreement/ES/MINECO/CGL2015-64422-P info:eu-repo/grantAgreement/ES/UZ/UZ2015-CIE-02 http://zaguan.unizar.es/record/71105 doi:10.1016/j.jafrearsci.2017.07.011 |
op_rights |
by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.jafrearsci.2017.07.011 |
container_title |
Journal of African Earth Sciences |
container_volume |
134 |
container_start_page |
435 |
op_container_end_page |
456 |
_version_ |
1766170142334517248 |