Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?

Audije Gil, Julia; Canillas, M.; Barroso Barcenilla, Fernando; Berrocal Casero, Melani; Campo, Adolfo del; González Martín, Armando; Molera, Judit; Vallcorba, O.; Rodríguez, Miguel A.; Cambra Moo, Oscar

Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?

Teeth provide information about the evolutionary pathway of an organism, its biology and habitat. This is the case even of fossilized teeth, since they have perdurable biomineralized structures, as biological apatite. The material that has been selected for this study comprises teeth from modern cro...

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Autores:	Audije Gil, Julia, Canillas, M., Barroso Barcenilla, Fernando, Berrocal Casero, Melani, Campo, Adolfo del, González Martín, Armando, Molera, Judit, Vallcorba, O., Rodríguez, Miguel A., Cambra Moo, Oscar
Tipo de recurso:	artículo
Fecha de publicación:	2022
País:	España
Institución:	Universidad Complutense de Madrid (UCM)
Repositorio:	Docta Complutense
Idioma:	inglés
OAI Identifier:	oai:docta.ucm.es:20.500.14352/71829
Acceso en línea:	https://hdl.handle.net/20.500.14352/71829
Access Level:	acceso abierto
Palabra clave:	568.14 57.086.3 Crocodylus niloticus Crocodylomorph Cretaceous Lo Hueco Biomineralized tissue Hydroxyapatite Paleontología 2416 Paleontología

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spelling	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?Audije Gil, JuliaCanillas, M.Barroso Barcenilla, FernandoBerrocal Casero, MelaniCampo, Adolfo delGonzález Martín, ArmandoMolera, JuditVallcorba, O.Rodríguez, Miguel A.Cambra Moo, Oscar568.1457.086.3Crocodylus niloticusCrocodylomorphCretaceousLo HuecoBiomineralized tissueHydroxyapatitePaleontología2416 PaleontologíaTeeth provide information about the evolutionary pathway of an organism, its biology and habitat. This is the case even of fossilized teeth, since they have perdurable biomineralized structures, as biological apatite. The material that has been selected for this study comprises teeth from modern crocodilian individuals and extinct Cretaceous crocodylomorphs from Lo Hueco site. Microanatomy, histochemistry and crystallographic nature of enamel, dentine and cementum have been characterized by Polarized Light Microscopy, SEM-EDS, Confocal Raman Spectroscopy and SR-µXRD. A focus has been made on dentine lamination. In the fossil sample short-period incremental lines show alternate presence of dentinal tubules that has not been described previously either in living or fossil archosaur. This could be related to influence of environmental circadian rhythms in the abundance, size and/or activity of cells depositing dentine in the day-night cycle. Regarding histochemical and crystallographic compositions, the major and mostly unique phase is HA, but in the case of fossil teeth, a secondary phase identified as hematite appears locally between discontinuities of the material. Incremental lines would not be related to variation in chemical composition and furthermore do not present different HA crystallographic nature (different directions of HA or different crystallite sizes) either. Only small intensity oscillations are observed in the fossil sample by SR-µXRD which are compatible with the alternating abundance of dentinal tubules. Crystallinity differences between modern and fossil material, as crystallite size and presence of CO32- groups could be explained by postdepositional processes.Università degli studi di Milano. Dipartimento di Scienze della Terra "A. Desio"Universidad Complutense de Madrid20222022-07-0120222022-07-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/71829reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttps://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/718292026-06-02T12:44:21Z
dc.title.none.fl_str_mv	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?
title	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?
spellingShingle	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses? Audije Gil, Julia 568.14 57.086.3 Crocodylus niloticus Crocodylomorph Cretaceous Lo Hueco Biomineralized tissue Hydroxyapatite Paleontología 2416 Paleontología
title_short	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?
title_full	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?
title_fullStr	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?
title_full_unstemmed	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?
title_sort	Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?
dc.creator.none.fl_str_mv	Audije Gil, Julia Canillas, M. Barroso Barcenilla, Fernando Berrocal Casero, Melani Campo, Adolfo del González Martín, Armando Molera, Judit Vallcorba, O. Rodríguez, Miguel A. Cambra Moo, Oscar
author	Audije Gil, Julia
author_facet	Audije Gil, Julia Canillas, M. Barroso Barcenilla, Fernando Berrocal Casero, Melani Campo, Adolfo del González Martín, Armando Molera, Judit Vallcorba, O. Rodríguez, Miguel A. Cambra Moo, Oscar
author_role	author
author2	Canillas, M. Barroso Barcenilla, Fernando Berrocal Casero, Melani Campo, Adolfo del González Martín, Armando Molera, Judit Vallcorba, O. Rodríguez, Miguel A. Cambra Moo, Oscar
author2_role	author author author author author author author author author
dc.contributor.none.fl_str_mv	Universidad Complutense de Madrid
dc.subject.none.fl_str_mv	568.14 57.086.3 Crocodylus niloticus Crocodylomorph Cretaceous Lo Hueco Biomineralized tissue Hydroxyapatite Paleontología 2416 Paleontología
topic	568.14 57.086.3 Crocodylus niloticus Crocodylomorph Cretaceous Lo Hueco Biomineralized tissue Hydroxyapatite Paleontología 2416 Paleontología
description	Teeth provide information about the evolutionary pathway of an organism, its biology and habitat. This is the case even of fossilized teeth, since they have perdurable biomineralized structures, as biological apatite. The material that has been selected for this study comprises teeth from modern crocodilian individuals and extinct Cretaceous crocodylomorphs from Lo Hueco site. Microanatomy, histochemistry and crystallographic nature of enamel, dentine and cementum have been characterized by Polarized Light Microscopy, SEM-EDS, Confocal Raman Spectroscopy and SR-µXRD. A focus has been made on dentine lamination. In the fossil sample short-period incremental lines show alternate presence of dentinal tubules that has not been described previously either in living or fossil archosaur. This could be related to influence of environmental circadian rhythms in the abundance, size and/or activity of cells depositing dentine in the day-night cycle. Regarding histochemical and crystallographic compositions, the major and mostly unique phase is HA, but in the case of fossil teeth, a secondary phase identified as hematite appears locally between discontinuities of the material. Incremental lines would not be related to variation in chemical composition and furthermore do not present different HA crystallographic nature (different directions of HA or different crystallite sizes) either. Only small intensity oscillations are observed in the fossil sample by SR-µXRD which are compatible with the alternating abundance of dentinal tubules. Crystallinity differences between modern and fossil material, as crystallite size and presence of CO32- groups could be explained by postdepositional processes.
publishDate	2022
dc.date.none.fl_str_mv	2022 2022-07-01 2022 2022-07-01
dc.type.none.fl_str_mv	journal article http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv	info:eu-repo/semantics/article
format	article
dc.identifier.none.fl_str_mv	https://hdl.handle.net/20.500.14352/71829
url	https://hdl.handle.net/20.500.14352/71829
dc.language.none.fl_str_mv	Inglés eng
language_invalid_str_mv	Inglés
language	eng
dc.rights.none.fl_str_mv	open access http://purl.org/coar/access_right/c_abf2 Atribución-NoComercial-SinDerivadas 3.0 España https://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv	info:eu-repo/semantics/openAccess
rights_invalid_str_mv	open access http://purl.org/coar/access_right/c_abf2 Atribución-NoComercial-SinDerivadas 3.0 España https://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv	openAccess
dc.format.none.fl_str_mv	application/pdf
dc.publisher.none.fl_str_mv	Università degli studi di Milano. Dipartimento di Scienze della Terra "A. Desio"
publisher.none.fl_str_mv	Università degli studi di Milano. Dipartimento di Scienze della Terra "A. Desio"
dc.source.none.fl_str_mv	reponame:Docta Complutense instname:Universidad Complutense de Madrid (UCM)
instname_str	Universidad Complutense de Madrid (UCM)
reponame_str	Docta Complutense
collection	Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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Going deeper into modern and fossil crocodilian tooth microanatomy: what can be inferred of palaeoenvironment and taphonomy from histochemical analyses?

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