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dc.contributor.authorO'gorman, José P.-
dc.contributor.authorTalevi, Marianella-
dc.contributor.authorFernández, Marta S.-
dc.date.accessioned2020-06-02T13:14:17Z-
dc.date.available2020-06-02T13:14:17Z-
dc.date.issued2016-06-
dc.identifier.citationO'gorman, José P., Talevi, Marianella y Fernández, Marta S. (2016). Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae). Cambridge University Press; Antarctic Science; 29 (1); 61-72es_ES
dc.identifier.issn0954-1020es_ES
dc.identifier.urihttps://www.cambridge.org/core/journals/antarctic-science/article/osteology-of-a-perinatal-aristonectine-plesiosauria-elasmosauridae/CCFD52DC1EE984C2F787FADC04EC9E4F-
dc.identifier.urihttps://rid.unrn.edu.ar/jspui/handle/20.500.12049/5186-
dc.description.abstractPerinatal specimens give valuable information about the first stages of vertebrate ontogeny. Here, the morphology and palaeohistology of an aristonectine perinatal specimen from Seymour Island (Isla Marambio), López de Bertodano Formation are analysed. The palaeohistological analysis shows incomplete endochondral ossification (retention of a calcified cartilaginous core in the medullary region), predominance of primary bone tissue without secondary remodelling, lack of primary or secondary osteons and of growth marks in the cortical bone, and open vascular spaces not surrounded by a thin coat of lamellar bone tissue. General lines of morphological changes were inferred from comparing the fossil with an adult aristonectine specimen indicating i) a tendency of relatively high and broad posterior cervicals to decrease during ontogeny, ii) a decrease of relative size of the dorsolateral process and an increase of the glenoid ramus and iii) the existence of two separate stages in propodial growth divided into an initial elongation followed by a distal expansion. The presence of a perinatal specimen in the James Ross Archipelago indicates that the region was used as a breeding area by the aristonectines during the last part of the Cretaceous.es_ES
dc.format.extentp. 61-72es_ES
dc.format.mediumdigitales_ES
dc.language.isoenes_ES
dc.publisherCambridge University Presses_ES
dc.titleOsteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae)es_ES
dc.typeArticuloes_ES
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-sa/4.0/es_ES
dc.description.filiationFil: O'gorman, José P. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Talevi, Marianella. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Fernández, Marta S. Consejo Nacional de Investigaciones Científicas y Técnicas. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: O'gorman, José P. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados. Buenos Aires, Argentina.es_ES
dc.description.filiationFil: Talevi, Marianella. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.es_ES
dc.description.filiationFil: Fernández, Marta S. Universidad Nacional de La Plata. Museo de La Plata. División Paleontología de Vertebrados. Buenos Aires, Argentina.es_ES
dc.subject.keywordMarine Reptilees_ES
dc.subject.keywordAristonectinaees_ES
dc.subject.keywordPerinatales_ES
dc.subject.keywordUpper Cretaceouses_ES
dc.subject.keywordWeddellian Provincees_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.relation.journalissue29 (1)es_ES
dc.description.reviewtruees_ES
dc.description.resumenPerinatal specimens give valuable information about the first stages of vertebrate ontogeny. Here, the morphology and palaeohistology of an aristonectine perinatal specimen from Seymour Island (Isla Marambio), López de Bertodano Formation are analysed. The palaeohistological analysis shows incomplete endochondral ossification (retention of a calcified cartilaginous core in the medullary region), predominance of primary bone tissue without secondary remodelling, lack of primary or secondary osteons and of growth marks in the cortical bone, and open vascular spaces not surrounded by a thin coat of lamellar bone tissue. General lines of morphological changes were inferred from comparing the fossil with an adult aristonectine specimen indicating i) a tendency of relatively high and broad posterior cervicals to decrease during ontogeny, ii) a decrease of relative size of the dorsolateral process and an increase of the glenoid ramus and iii) the existence of two separate stages in propodial growth divided into an initial elongation followed by a distal expansion. The presence of a perinatal specimen in the James Ross Archipelago indicates that the region was used as a breeding area by the aristonectines during the last part of the Cretaceous.es_ES
dc.identifier.doihttps://doi.org/10.1017/S0954102016000365-
dc.relation.journalTitleAntarctic Sciencees_ES
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