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dc.contributor.author
O'gorman, Jose Patricio
dc.contributor.author
Talevi, Marianella
dc.contributor.author
Fernández, Marta Susana
dc.date.available
2018-06-22T17:08:09Z
dc.date.issued
2017-02
dc.identifier.citation
O'gorman, Jose Patricio; Talevi, Marianella; Fernández, Marta Susana; Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae); Cambridge University Press; Antarctic Science; 29; 1; 2-2017; 61-72
dc.identifier.issn
0954-1020
dc.identifier.uri
http://hdl.handle.net/11336/49655
dc.description.abstract
Perinatal 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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Cambridge University Press
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Key Words Aristonectinae
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Marine Reptile
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Perinatal
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Upper Cretaceous
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Weddellian Province
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-06-22T14:21:58Z
dc.journal.volume
29
dc.journal.number
1
dc.journal.pagination
61-72
dc.journal.pais
Reino Unido
dc.journal.ciudad
Cambridge
dc.description.fil
Fil: O'gorman, Jose Patricio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
dc.description.fil
Fil: Talevi, Marianella. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Negro. Sede Alto Valle. Instituto de Investigaciones en Paleobiología y Geología; Argentina
dc.description.fil
Fil: Fernández, Marta Susana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
dc.journal.title
Antarctic Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1017/S0954102016000365
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/antarctic-science/article/osteology-of-a-perinatal-aristonectine-plesiosauria-elasmosauridae/CCFD52DC1EE984C2F787FADC04EC9E4F


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