| Texto completo | |
| Autor(es): Mostrar menos - |
Stolarski, Jaroslaw
[1]
;
Coronado, Ismael
[2]
;
Murphy, Jack G.
[3]
;
Kitahara, V, Marcelo
;
Janiszewska, Katarzyna
[1]
;
Mazur, Maciej
[4]
;
Gothmann, Anne M.
[5, 6]
;
Bouvier, Anne-Sophie
[7]
;
Marin-Carbonne, Johanna
[7]
;
Taylor, Michelle L.
[8]
;
Quattrini, Andrea M.
[9, 10]
;
McFadden, Catherine S.
[10]
;
Higgins, John A.
[3]
;
Robinson, Laura F.
[11]
;
Meibom, Anders
[7, 12]
Número total de Autores: 15
|
| Afiliação do(s) autor(es): Mostrar menos - | [1] Polish Acad Sci, Inst Paleobiol, PL-00818 Warsaw - Poland
[2] Univ Leon, Fac Biol & Environm Sci, Leon 24171 - Spain
[3] Princeton Univ, Dept Geosci, Princeton, NJ 08544 - USA
[4] Univ Warsaw, Dept Chem, PL-02093 Warsaw - Poland
[5] St Olaf Coll, Dept Environm Studies, Northfield, MN 55057 - USA
[6] St Olaf Coll, Dept Phys, Northfield, MN 55057 - USA
[7] Univ Lausanne, Ctr Adv Surface Anal, Inst Earth Sci, CH-1015 Lausanne - Switzerland
[8] Univ Essex, Sch Life Sci, Wivenhoe Pk, Colchester CO4 3SQ, Essex - England
[9] Smithsonian Inst, Dept Invertebrate Zool, Washington, DC 20560 - USA
[10] Harvey Mudd Coll, Dept Biol, Claremont, CA 91711 - USA
[11] Univ Bristol, Sch Earth Sci, Clifton BS8 1RJ - England
[12] Ecole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, Lab Biol Geochem, CH-1015 Lausanne - Switzerland
Número total de Afiliações: 12
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA; v. 118, n. 3 JAN 19 2021. |
| Citações Web of Science: | 1 |
| Resumo | |
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. (AU) | |
| Processo FAPESP: | 14/01332-0 - Filogenômica da ordem Scleractinia (Cnidaria, Anthozoa): relações entre evolução da ordem e mudanças climáticas |
| Beneficiário: | Marcelo Visentini Kitahara |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Jovens Pesquisadores |