Synchrotron X-ray microdiffraction to study dental structures in Cretaceous crocodylomorphs
Entidad
UAM. Departamento de BiologíaEditor
ElsevierFecha de edición
2021-07-15Cita
10.1016/j.cretres.2021.104960
Cretaceous Research 128 (2021):104960
ISSN
0195-6671 (print)DOI
10.1016/j.cretres.2021.104960Financiado por
This work was funded by the projects PGC2018-099405-B-100 (Ministerio de Ciencia, Innovacion y Universidades); HAR2017- 82755-P, HAR2016-78036-P, HAR2016-74846-P, HAR2017-83004-P, CGL2015-66604, CGL2015-68363 and MAT2015-67593-P (Ministerio de Economía y Competitividad, Spain); and 201860E127 (CSIC)Proyecto
Gobierno de España. CGL2015-68363; Gobierno de España. PGC2018-099405-B-100; Gobierno de España. HAR2016-74846-P; Gobierno de España. CGL2015-66604-R; Gobierno de España. MAT2015-67593-PVersión del editor
https://doi.org/10.1016/j.cretres.2021.104960Materias
Biological apatite; Cretaceous; Crocodylomorph; Crocodylus niloticus; Synchrotron radiation; Teeth; X-ray microdiffraction; Biología y Biomedicina / BiologíaDerechos
© 2021 The AuthorsEsta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Resumen
Synchrotron radiation X-ray microdiffraction (SR-μXRD) has been applied for the first time as a fundamental method of analysis to unveil crocodilian teeth growth and development. Teeth from a fossil crocodylomorph from the Upper Cretaceous site of Lo Hueco (Spain) and a modern crocodylian from the living species Crocodylus niloticus have been analysed. Both samples have been studied through Polarized Light Microscopy, Scanning Electron Microscopy coupled with Energy Dispersive X-Ray Spectroscopy, Confocal Raman Spectroscopy, and SR-μXRD. Significant differences have been found in hydroxyapatite (HA) crystallite sizes and texture, and the evolution of these two features along teeth depth. The main differences observed in crystallite size are related to postdepositional processes and/or the environmental and functional pressures of teeth during crocodylomorph life, very different from that of the modern specimen. Regarding the crystalline texture in the tooth enamel, it can be linked to teeth functionality during crocodilian life, causing the directed growth of HA crystallites due to the mechanical stress to which they are subjected
Lista de ficheros
Google Scholar:Vallcorba, O.
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Canillas, M.
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Audije-Gil, J.
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Barroso-Barcenilla, F.
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González-Martín, A.
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Molera, J.
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Rodríguez, M. A.
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Cambra Moo, Óscar
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