Show simple item record Cerda, Ignacio Alejandro Desojo, Julia Brenda Scheyer,Torsten M. Schultze, Cesar Leandro 2016-07-26T15:52:04Z 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.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.subject ARCHOSAURIA
dc.subject RAUISUCHIA
dc.subject HISTOLOGY
dc.subject DERMAL ARMOUR
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 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
dc.description.fil 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/
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geobios.2013.01.004
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/

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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)