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dc.contributor.author
Cerda, Ignacio Alejandro
dc.contributor.author
Desojo, Julia Brenda
dc.contributor.author
Scheyer,Torsten M.
dc.contributor.author
Schultze, Cesar Leandro
dc.date.available
2016-07-26T15:52:04Z
dc.date.issued
2013-04-30
dc.identifier.citation
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
dc.identifier.issn
0016-6995
dc.identifier.uri
http://hdl.handle.net/11336/6686
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Archosauria
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Rauisuchia
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Microanatomy
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Histology
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Dermal Armour
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Osteogenesis
dc.subject.classification
Otras Ciencias Naturales y Exactas
dc.subject.classification
Otras Ciencias Naturales y Exactas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Osteoderm microstructure of "rauisuchian" archosaurs from South America
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-07-22T18:52:21Z
dc.journal.volume
46
dc.journal.number
4
dc.journal.pagination
273-283
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
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; Argentina
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Fil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina
dc.description.fil
Fil: Scheyer,Torsten M. . Universität Zürich. Paläontologisches Institut und Museum; Suiza
dc.description.fil
Fil: Schultze, Cesar Leandro . Universidade Federal do Rio Grande do Sul; Brasil
dc.journal.title
Geobios
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geobios.2013.01.004
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.geobios.2013.01.004
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0016699513000399


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