Osteoderm microstructure of "rauisuchian" archosaurs from South America

In this contribution we analyze and discuss the microanatomy and histology of postcranial osteoderms of a number of "rauisuchians" from different localities of South America (Argentina and Brazil). The studied sample includes osteoderms of Fasolasuchus tenax, Prestosuchus chiniquensis, Sau...

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Autores: Cerda, Ignacio Alejandro, Desojo, Julia Brenda, Scheyer,Torsten M., Schultze, Cesar Leandro
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/6686
Acceso en línea:http://hdl.handle.net/11336/6686
Access Level:acceso abierto
Palabra clave:Archosauria
Rauisuchia
Microanatomy
Histology
Dermal Armour
Osteogenesis
https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
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spelling Osteoderm microstructure of "rauisuchian" archosaurs from South AmericaCerda, Ignacio AlejandroDesojo, Julia BrendaScheyer,Torsten M. Schultze, Cesar Leandro ArchosauriaRauisuchiaMicroanatomyHistologyDermal ArmourOsteogenesishttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1In this contribution we analyze and discuss the microanatomy and histology of postcranial osteoderms of a number of "rauisuchians" from different localities of South America (Argentina and Brazil). The studied sample includes osteoderms of Fasolasuchus tenax, Prestosuchus chiniquensis, Saurosuchus galilei and an undetermined rauisuchian from Brazil. The bone microanatomy of the osteoderms is variable: whereas some specimens have a rather compact structure, others show a diploe architecture with a central cancellous core bordered by two compact cortices. Both external and basal cortices are mainly composed of poorly vascularized, fine and coarse parallel-fibred bone and networks of interwoven and mineralized fiber bundles. The internal region of the non-remodeled specimens consists of a well- vascularized core in which the intrinsic fibers exhibit important variations (even in the same specimen), ranging from coarse, parallel-fibred to woven-fibred bone tissues. Lines of arrested growth (LAGs) are well recorded in both basal and external cortices. Differences in the bone microstructure (compact vs. diploe) could be related to the age, sex and reproductive status of the sampled individuals. Hence, age estimation based on the count of LAGs in rauisuchian osteoderms appears to be reliable only in the early stages of ontogeny. The bone microstructure suggests that rauisuchian osteoderms were originated through a mechanism that involves both intramembranous and metaplastic ossifications.Fil: Cerda, Ignacio Alejandro. Universidad Nacional de Rio Negro. Sede Alto Valle. Instituto de Investigaciones en Paleobiologia y Geologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; ArgentinaFil: Scheyer,Torsten M. . Universität Zürich. Paläontologisches Institut und Museum; SuizaFil: Schultze, Cesar Leandro . Universidade Federal do Rio Grande do Sul; BrasilElsevier2013-04-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/6686Cerda, Ignacio Alejandro; Desojo, Julia Brenda; Scheyer,Torsten M. ; Schultze, Cesar Leandro ; Osteoderm microstructure of "rauisuchian" archosaurs from South America; Elsevier; Geobios; 46; 4; 30-4-2013; 273-2830016-6995enginfo:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geobios.2013.01.004info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0016699513000399info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:33:08Zoai:ri.conicet.gov.ar:11336/6686instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:33:08.623CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Osteoderm microstructure of "rauisuchian" archosaurs from South America
title Osteoderm microstructure of "rauisuchian" archosaurs from South America
spellingShingle Osteoderm microstructure of "rauisuchian" archosaurs from South America
Cerda, Ignacio Alejandro
Archosauria
Rauisuchia
Microanatomy
Histology
Dermal Armour
Osteogenesis
https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
title_short Osteoderm microstructure of "rauisuchian" archosaurs from South America
title_full Osteoderm microstructure of "rauisuchian" archosaurs from South America
title_fullStr Osteoderm microstructure of "rauisuchian" archosaurs from South America
title_full_unstemmed Osteoderm microstructure of "rauisuchian" archosaurs from South America
title_sort Osteoderm microstructure of "rauisuchian" archosaurs from South America
dc.creator.none.fl_str_mv Cerda, Ignacio Alejandro
Desojo, Julia Brenda
Scheyer,Torsten M.
Schultze, Cesar Leandro
author Cerda, Ignacio Alejandro
author_facet Cerda, Ignacio Alejandro
Desojo, Julia Brenda
Scheyer,Torsten M.
Schultze, Cesar Leandro
author_role author
author2 Desojo, Julia Brenda
Scheyer,Torsten M.
Schultze, Cesar Leandro
author2_role author
author
author
dc.subject.none.fl_str_mv Archosauria
Rauisuchia
Microanatomy
Histology
Dermal Armour
Osteogenesis
https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
topic Archosauria
Rauisuchia
Microanatomy
Histology
Dermal Armour
Osteogenesis
https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
description In this contribution we analyze and discuss the microanatomy and histology of postcranial osteoderms of a number of "rauisuchians" from different localities of South America (Argentina and Brazil). The studied sample includes osteoderms of Fasolasuchus tenax, Prestosuchus chiniquensis, Saurosuchus galilei and an undetermined rauisuchian from Brazil. The bone microanatomy of the osteoderms is variable: whereas some specimens have a rather compact structure, others show a diploe architecture with a central cancellous core bordered by two compact cortices. Both external and basal cortices are mainly composed of poorly vascularized, fine and coarse parallel-fibred bone and networks of interwoven and mineralized fiber bundles. The internal region of the non-remodeled specimens consists of a well- vascularized core in which the intrinsic fibers exhibit important variations (even in the same specimen), ranging from coarse, parallel-fibred to woven-fibred bone tissues. Lines of arrested growth (LAGs) are well recorded in both basal and external cortices. Differences in the bone microstructure (compact vs. diploe) could be related to the age, sex and reproductive status of the sampled individuals. Hence, age estimation based on the count of LAGs in rauisuchian osteoderms appears to be reliable only in the early stages of ontogeny. The bone microstructure suggests that rauisuchian osteoderms were originated through a mechanism that involves both intramembranous and metaplastic ossifications.
publishDate 2013
dc.date.none.fl_str_mv 2013-04-30
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/6686
Cerda, Ignacio Alejandro; Desojo, Julia Brenda; Scheyer,Torsten M. ; Schultze, Cesar Leandro ; Osteoderm microstructure of "rauisuchian" archosaurs from South America; Elsevier; Geobios; 46; 4; 30-4-2013; 273-283
0016-6995
url http://hdl.handle.net/11336/6686
identifier_str_mv Cerda, Ignacio Alejandro; Desojo, Julia Brenda; Scheyer,Torsten M. ; Schultze, Cesar Leandro ; Osteoderm microstructure of "rauisuchian" archosaurs from South America; Elsevier; Geobios; 46; 4; 30-4-2013; 273-283
0016-6995
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geobios.2013.01.004
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0016699513000399
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15,812429

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