Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina

Autores
Cerda, Ignacio Alejandro; Powell, Jaime E.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Cerda, Ignacio A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Cerda, Ignacio A. Universidad Nacional del Comahue; Argentina
Fil: Cerda, Ignacio A. Universidad Bariloche; Argentina
Fil: Cerda, Ignacio A. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Powell, Jaime E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Fil: Powell, Jaime E. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
The first unambiguous evidence of the presence of osteoderms in sauropod dinosaurs came from the discovery of Saltasaurus loricatus, a titanosaur from the Upper Cretaceous of Argentina. The dermal armor of Saltasaurus is composed of bony plates and small dermal ossicles. Here, we analyze the bone microstructure of these elements and provide information regarding its origin and development. The bony plates are composed almost entirely of reconstructed cancellous bone. Remains of primary bone consist of coarse bundles of mineralized collagenous fibers towards the external surface. Also, woven fibered bone tissue appears in the basal and lateral regions. Dermal ossicles lack secondary remodeling, and their matrix is formed by three orthogonal systems of collagenous fiber bundles. Growth lines are present in both bony plates and ossicles. Bone histology reveals that osteoderms mainly originated through direct mineralization (metaplasia) of the dermis, although other mechanisms are also involved (at least in the origin of dermal plates). The common features of development and integumental location of the osteoderms of Saltasaurus and other non-related vertebrates (e.g., lepidosaurs, crocodylomorphs) are linked to the intrinsic skeletogenic properties of the dermis.
Materia
Meteorología y Ciencias Atmosféricas
Sauropoda
Titanosauria
Osteohistology
Osteoderms
Dermal Ossicles
Metaplasia
Argentina
Meteorología y Ciencias Atmosféricas
Nivel de accesibilidad
acceso restringido
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
RID-UNRN (UNRN)
Institución
Universidad Nacional de Río Negro
OAI Identificador
oai:rid.unrn.edu.ar:20.500.12049/2614
Acceder
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network_acronym_str RIDUNRN
repository_id_str 4369
network_name_str RID-UNRN (UNRN)
spelling Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest ArgentinaCerda, Ignacio AlejandroPowell, Jaime E.Meteorología y Ciencias AtmosféricasSauropodaTitanosauriaOsteohistologyOsteodermsDermal OssiclesMetaplasiaArgentinaMeteorología y Ciencias AtmosféricasFil: Cerda, Ignacio A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Cerda, Ignacio A. Universidad Nacional del Comahue; ArgentinaFil: Cerda, Ignacio A. Universidad Bariloche; ArgentinaFil: Cerda, Ignacio A. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Powell, Jaime E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Powell, Jaime E. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; ArgentinaThe first unambiguous evidence of the presence of osteoderms in sauropod dinosaurs came from the discovery of Saltasaurus loricatus, a titanosaur from the Upper Cretaceous of Argentina. The dermal armor of Saltasaurus is composed of bony plates and small dermal ossicles. Here, we analyze the bone microstructure of these elements and provide information regarding its origin and development. The bony plates are composed almost entirely of reconstructed cancellous bone. Remains of primary bone consist of coarse bundles of mineralized collagenous fibers towards the external surface. Also, woven fibered bone tissue appears in the basal and lateral regions. Dermal ossicles lack secondary remodeling, and their matrix is formed by three orthogonal systems of collagenous fiber bundles. Growth lines are present in both bony plates and ossicles. Bone histology reveals that osteoderms mainly originated through direct mineralization (metaplasia) of the dermis, although other mechanisms are also involved (at least in the origin of dermal plates). The common features of development and integumental location of the osteoderms of Saltasaurus and other non-related vertebrates (e.g., lepidosaurs, crocodylomorphs) are linked to the intrinsic skeletogenic properties of the dermis.2010-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfCerda, Ignacio A., Powell, Jaime E. (2010). Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina. Polish Academy of Sciences. Institute of Paleobiology; Acta Palaeontologica Polonica; 55; 3; pp. 389-3980567-79201732-2421http://www.app.pan.pl/article/item/app20091101.htmlhttp://dx.doi.org/10.4202/app.2009.1101http://hdl.handle.net/11336/73560https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2614eng55Acta Palaeontologica Polonicainfo:eu-repo/semantics/restrictedAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-04T11:12:41Zoai:rid.unrn.edu.ar:20.500.12049/2614instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-04 11:12:42.036RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
dc.title.none.fl_str_mv Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina
title Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina
spellingShingle Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina
Cerda, Ignacio Alejandro
Meteorología y Ciencias Atmosféricas
Sauropoda
Titanosauria
Osteohistology
Osteoderms
Dermal Ossicles
Metaplasia
Argentina
Meteorología y Ciencias Atmosféricas
title_short Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina
title_full Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina
title_fullStr Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina
title_full_unstemmed Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina
title_sort Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina
dc.creator.none.fl_str_mv Cerda, Ignacio Alejandro
Powell, Jaime E.
author Cerda, Ignacio Alejandro
author_facet Cerda, Ignacio Alejandro
Powell, Jaime E.
author_role author
author2 Powell, Jaime E.
author2_role author
dc.subject.none.fl_str_mv Meteorología y Ciencias Atmosféricas
Sauropoda
Titanosauria
Osteohistology
Osteoderms
Dermal Ossicles
Metaplasia
Argentina
Meteorología y Ciencias Atmosféricas
topic Meteorología y Ciencias Atmosféricas
Sauropoda
Titanosauria
Osteohistology
Osteoderms
Dermal Ossicles
Metaplasia
Argentina
Meteorología y Ciencias Atmosféricas
dc.description.none.fl_txt_mv Fil: Cerda, Ignacio A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Cerda, Ignacio A. Universidad Nacional del Comahue; Argentina
Fil: Cerda, Ignacio A. Universidad Bariloche; Argentina
Fil: Cerda, Ignacio A. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Powell, Jaime E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Fil: Powell, Jaime E. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
The first unambiguous evidence of the presence of osteoderms in sauropod dinosaurs came from the discovery of Saltasaurus loricatus, a titanosaur from the Upper Cretaceous of Argentina. The dermal armor of Saltasaurus is composed of bony plates and small dermal ossicles. Here, we analyze the bone microstructure of these elements and provide information regarding its origin and development. The bony plates are composed almost entirely of reconstructed cancellous bone. Remains of primary bone consist of coarse bundles of mineralized collagenous fibers towards the external surface. Also, woven fibered bone tissue appears in the basal and lateral regions. Dermal ossicles lack secondary remodeling, and their matrix is formed by three orthogonal systems of collagenous fiber bundles. Growth lines are present in both bony plates and ossicles. Bone histology reveals that osteoderms mainly originated through direct mineralization (metaplasia) of the dermis, although other mechanisms are also involved (at least in the origin of dermal plates). The common features of development and integumental location of the osteoderms of Saltasaurus and other non-related vertebrates (e.g., lepidosaurs, crocodylomorphs) are linked to the intrinsic skeletogenic properties of the dermis.
description Fil: Cerda, Ignacio A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
publishDate 2010
dc.date.none.fl_str_mv 2010-09
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 Cerda, Ignacio A., Powell, Jaime E. (2010). Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina. Polish Academy of Sciences. Institute of Paleobiology; Acta Palaeontologica Polonica; 55; 3; pp. 389-398
0567-7920
1732-2421
http://www.app.pan.pl/article/item/app20091101.html
http://dx.doi.org/10.4202/app.2009.1101
http://hdl.handle.net/11336/73560
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2614
identifier_str_mv Cerda, Ignacio A., Powell, Jaime E. (2010). Dermal armor histology of Saltasaurus loricatus, an Upper Cretaceous sauropod dinosaur from Northwest Argentina. Polish Academy of Sciences. Institute of Paleobiology; Acta Palaeontologica Polonica; 55; 3; pp. 389-398
0567-7920
1732-2421
url http://www.app.pan.pl/article/item/app20091101.html
http://dx.doi.org/10.4202/app.2009.1101
http://hdl.handle.net/11336/73560
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2614
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 55
Acta Palaeontologica Polonica
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RID-UNRN (UNRN)
instname:Universidad Nacional de Río Negro
reponame_str RID-UNRN (UNRN)
collection RID-UNRN (UNRN)
instname_str Universidad Nacional de Río Negro
repository.name.fl_str_mv RID-UNRN (UNRN) - Universidad Nacional de Río Negro
repository.mail.fl_str_mv rid@unrn.edu.ar
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score 12.623145

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