A modern scleractinian coral with a two-component calcite–aragonite skeleton
One of the most conserved traits in the evolution of biomineralizing organisms is the taxon-specific selection of skeletal minerals. All modern scleractinian corals are thought to produce skeletons exclusively of the calcium-carbonate polymorph aragonite. Despite strong fluctuations in ocean chemist...
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ftinfoscience:oai:infoscience.epfl.ch:282900 2023-05-15T13:44:32+02:00 A modern scleractinian coral with a two-component calcite–aragonite skeleton Stolarski, Jarosław Coronado, Ismael Murphy, Jack G. Kitahara, Marcelo V. Janiszewska, Katarzyna Mazur, Maciej Gothmann, Anne M. Bouvier, Anne-Sophie Marin-Carbonne, Johanna Taylor, Michelle L. Quattrini, Andrea M. McFadden, Catherine S. Higgins, John A. Robinson, Laura F. Meibom, Anders 2021-01-21T13:56:48Z https://doi.org/10.1073/pnas.2013316117 https://infoscience.epfl.ch/record/282900/files/e2013316117.full.pdf http://infoscience.epfl.ch/record/282900 unknown doi:10.1073/pnas.2013316117 https://infoscience.epfl.ch/record/282900/files/e2013316117.full.pdf http://infoscience.epfl.ch/record/282900 http://infoscience.epfl.ch/record/282900 Text 2021 ftinfoscience https://doi.org/10.1073/pnas.2013316117 2023-02-13T23:03:12Z One of the most conserved traits in the evolution of biomineralizing organisms is the taxon-specific selection of skeletal minerals. All modern scleractinian corals are thought to produce skeletons exclusively of the calcium-carbonate polymorph aragonite. Despite strong fluctuations in ocean chemistry (notably the Mg/Ca ratio), this feature is believed to be conserved throughout the coral fossil record, spanning more than 240 million years. Only one example, the Cretaceous scleractinian coral Coelosmilia (ca. 70 to 65 Ma), is thought to have produced a calcitic skeleton. Here, we report that the modern asymbiotic scleractinian coral Paraconotrochus antarcticus living in the Southern Ocean forms a two-component carbonate skeleton, with an inner structure made of high-Mg calcite and an outer structure composed of aragonite. P. antarcticus and Cretaceous Coelosmilia skeletons share a unique microstructure indicating a close phylogenetic relationship, consistent with the early divergence of P. antarcticus within the Vacatina (i.e., Robusta) clade, estimated to have occurred in the Mesozoic (ca. 116 Mya). Scleractinian corals thus join the group of marine organisms capable of forming bimineralic structures, which requires a highly controlled biomineralization mechanism; this capability dates back at least 100 My. Due to its relatively prolonged isolation, the Southern Ocean stands out as a repository for extant marine organisms with ancient traits. Text Antarc* antarcticus Southern Ocean EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Southern Ocean Proceedings of the National Academy of Sciences 118 3 e2013316117 |
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Open Polar |
collection |
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
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ftinfoscience |
language |
unknown |
description |
One of the most conserved traits in the evolution of biomineralizing organisms is the taxon-specific selection of skeletal minerals. All modern scleractinian corals are thought to produce skeletons exclusively of the calcium-carbonate polymorph aragonite. Despite strong fluctuations in ocean chemistry (notably the Mg/Ca ratio), this feature is believed to be conserved throughout the coral fossil record, spanning more than 240 million years. Only one example, the Cretaceous scleractinian coral Coelosmilia (ca. 70 to 65 Ma), is thought to have produced a calcitic skeleton. Here, we report that the modern asymbiotic scleractinian coral Paraconotrochus antarcticus living in the Southern Ocean forms a two-component carbonate skeleton, with an inner structure made of high-Mg calcite and an outer structure composed of aragonite. P. antarcticus and Cretaceous Coelosmilia skeletons share a unique microstructure indicating a close phylogenetic relationship, consistent with the early divergence of P. antarcticus within the Vacatina (i.e., Robusta) clade, estimated to have occurred in the Mesozoic (ca. 116 Mya). Scleractinian corals thus join the group of marine organisms capable of forming bimineralic structures, which requires a highly controlled biomineralization mechanism; this capability dates back at least 100 My. Due to its relatively prolonged isolation, the Southern Ocean stands out as a repository for extant marine organisms with ancient traits. |
format |
Text |
author |
Stolarski, Jarosław Coronado, Ismael Murphy, Jack G. Kitahara, Marcelo V. Janiszewska, Katarzyna Mazur, Maciej Gothmann, Anne M. Bouvier, Anne-Sophie Marin-Carbonne, Johanna Taylor, Michelle L. Quattrini, Andrea M. McFadden, Catherine S. Higgins, John A. Robinson, Laura F. Meibom, Anders |
spellingShingle |
Stolarski, Jarosław Coronado, Ismael Murphy, Jack G. Kitahara, Marcelo V. Janiszewska, Katarzyna Mazur, Maciej Gothmann, Anne M. Bouvier, Anne-Sophie Marin-Carbonne, Johanna Taylor, Michelle L. Quattrini, Andrea M. McFadden, Catherine S. Higgins, John A. Robinson, Laura F. Meibom, Anders A modern scleractinian coral with a two-component calcite–aragonite skeleton |
author_facet |
Stolarski, Jarosław Coronado, Ismael Murphy, Jack G. Kitahara, Marcelo V. Janiszewska, Katarzyna Mazur, Maciej Gothmann, Anne M. Bouvier, Anne-Sophie Marin-Carbonne, Johanna Taylor, Michelle L. Quattrini, Andrea M. McFadden, Catherine S. Higgins, John A. Robinson, Laura F. Meibom, Anders |
author_sort |
Stolarski, Jarosław |
title |
A modern scleractinian coral with a two-component calcite–aragonite skeleton |
title_short |
A modern scleractinian coral with a two-component calcite–aragonite skeleton |
title_full |
A modern scleractinian coral with a two-component calcite–aragonite skeleton |
title_fullStr |
A modern scleractinian coral with a two-component calcite–aragonite skeleton |
title_full_unstemmed |
A modern scleractinian coral with a two-component calcite–aragonite skeleton |
title_sort |
modern scleractinian coral with a two-component calcite–aragonite skeleton |
publishDate |
2021 |
url |
https://doi.org/10.1073/pnas.2013316117 https://infoscience.epfl.ch/record/282900/files/e2013316117.full.pdf http://infoscience.epfl.ch/record/282900 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* antarcticus Southern Ocean |
genre_facet |
Antarc* antarcticus Southern Ocean |
op_source |
http://infoscience.epfl.ch/record/282900 |
op_relation |
doi:10.1073/pnas.2013316117 https://infoscience.epfl.ch/record/282900/files/e2013316117.full.pdf http://infoscience.epfl.ch/record/282900 |
op_doi |
https://doi.org/10.1073/pnas.2013316117 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
118 |
container_issue |
3 |
container_start_page |
e2013316117 |
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1766202827025154048 |