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dc.contributor.authorGarat, Luis Marcial-
dc.contributor.authorYunes, Yamile S.-
dc.contributor.authorCerda, Ignacio Alejandro-
dc.contributor.authorTalevi, Marianella-
dc.date.accessioned2020-06-03T16:36:38Z-
dc.date.available2020-06-03T16:36:38Z-
dc.date.issued2014-
dc.identifier.urihttps://www.researchgate.net/publication/286934709_4th_International_Palaeontological_Congress-_Abstract_Volume-
dc.identifier.urihttps://rid.unrn.edu.ar/jspui/handle/20.500.12049/5218-
dc.language.isoenes_ES
dc.relation.ispartof4th International Paleontological Congresses_ES
dc.titleHistology of ossified epaxial tendons in Gasparinisaura Cincosaltensis (Ornithischia: Ornithopoda)es_ES
dc.typeObjeto de conferenciaes_ES
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-sa/4.0/es_ES
dc.description.filiationFil: Garat, Luis M. Universidad Nacional de Río Negro. Río Negro, Argentina.es_ES
dc.description.filiationFil: Yunes, Yamile S. Universidad Nacional de Río Negro. Río Negro, Argentina.es_ES
dc.description.filiationFil: Cerda, Ignacio A. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiologia y Geologia. Río Negro, Argentina.es_ES
dc.description.filiationFil: Talevi, Marianella. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiologia y Geologia. Río Negro, Argentina.es_ES
dc.description.filiationFil: Talevi, Marianella. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Cerda, Ignacio A. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.subject.keywordOrnithopod Dinosaurses_ES
dc.subject.keywordInternational Paleontological Congresses_ES
dc.subject.keywordAnacleto Formationes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología.es_ES
dc.description.resumenThe presence of ossified tendons along the vertebral column is a synapomorphy of Ornithischia. In ornithopod dinosaurs, basal iguanodontians (e.g., Tenontosaurus) have ossified tendons arranged in long bundles down the back and out along the tail vertebrae. These tendons parallel the vertebral column. On the other hand, more derived iguanodontians (such as hadrosaurs) have ossified tendons arranged in a crisscrossing trellis-like configuration down the back and tail. Although the microstructure of ossified tendons in derived iguanodontians has been well studied, studies in more basal forms are rather scarce. In the present work the microstructure of the ossified tendons of the basal ornithopod Gasparinisaura cincosaltensis is studied. The sample consists of several tendons from the caudal region of a specimen (MCSPv 111) collected from the Cinco Saltos locality (Northern Patagonia), in outcrops of the Anacleto Formation (Late Cretaceous). Ossified tendons consist of a homogeneous matrix composed of coarse mineralized collagenous fibers oriented along the tendon main axis. Bone cell lacunae are abundant and they are oriented following the fiber arrangement. The vascularization is low and consists of simple vascular canals and primary osteons. No lines of arrested growth and periosteal bone remodeling are observed. The low degree of secondary remodeling in the sampled bones of Gasparinisaura suggests an early growth stage in this specimen, similar to the reported in ossified tendons of juvenile hadrosaurs. The nature of the primary bone matrix in the ossified tendons of Gasparnisaura indicates that these structures mainly originated through direct mineralization (metaplasia) of tendinous structures. This mechanism has been previously proposed for the origin of ossified tendons in other ornithischians and in cervical ribs in sauropod dinosaurs.es_ES
dc.type.subtypeResumenes_ES
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