Synchrotron X-ray microdiffraction to study dental structures in Cretaceous crocodylomorphs

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Authors
Vallcorba, Oriol; Canillas, M.; Audije-Gil, Julia; Barroso Barcenilla, FernandoUniversity of Alcalá Author; González Martín, A.; [et al.]
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/64721
DOI: 10.1016/j.cretres.2021.104960
ISSN: 0195-6671
Date
2021-07-15
Academic Departments
Universidad de Alcalá. Departamento de Geología, Geografía y Medio Ambiente
Funders
Ministerio de Economía y Competitividad
Agencia Estatal de Investigación
Bibliographic citation
Cretaceous Research, 2021, v. 128, p. 104960
Keywords
Teeth
Cretaceous
Crocodylomorph
Crocodylus niloticus
Synchrotron radiation
X-ray microdiffraction
Biological apatite
Project
info:eu-repo/grantAgreement/MINECO//CGL2015-66604-R/ES/RESPUESTAS BIOTICAS A CRISIS PALEOAMBIENTALES EN LAS PLATAFORMAS PERIBERICAS MESOZOI/
info:eu-repo/grantAgreement/MINECO//CGL2015-68363-P/ES/NUEVAS CONCEPTOS Y HERRAMIENTAS DE ANALISIS PARA EL ESTUDIO DEL PALEOECOSISTEMA DE LO HUECO (CRETACICO SUPERIOR. FUENTES, CUENCA)/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-099405-B-I00/ES/CONSTRUYENDO LAS IMAGENES DE GUERREROS EN EUROPA. EL PAPEL DEL CAMPANIFORME IBERICO TIPO CIEMPOZUELOS/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/HAR2017-82755-P/ES/MODERNIDAD(ES) DESCENTRALIZADA(S): ARTE, POLITICA Y CONTRACULTURA EN EL EJE TRANSATLANTICO DURANTE LA GUERRA FRIA II/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/HAR2017-83004-P/ES/ESTUDIO DE LOS ESPACIOS RITUALES MUDEJARES EN LA CASTILLA MEDIEVAL: MEZQUITAS Y CEMENTERIOS ISLAMICOS EN UNA SOCIEDAD CRISTIANA/
info:eu-repo/grantAgreement/MINECO//MAT2015-67593-P/ES/NUEVOS DESARROLLOS EN LA SOLUCION ESTRUCTURAL DE MICRO%2FNANODOMINIOS CRISTALINOS POR DIFRACCION SINCROTRONICA A TRAVES DEL SUSTRATO/
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
© 2021 The Authors
Access rights
info:eu-repo/semantics/openAccess
Abstract
Synchrotron radiation X-ray microdiffraction (SR-mXRD) 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-mXRD. 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.

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Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
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