Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae)
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 incomplet...
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ftconicet:oai:ri.conicet.gov.ar:11336/49655 2023-10-09T21:47:17+02:00 Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae) O'gorman, Jose Patricio Talevi, Marianella Fernández, Marta Susana application/pdf http://hdl.handle.net/11336/49655 eng eng Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102016000365 info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/antarctic-science/article/osteology-of-a-perinatal-aristonectine-plesiosauria-elasmosauridae/CCFD52DC1EE984C2F787FADC04EC9E4F http://hdl.handle.net/11336/49655 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 0954-1020 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ KEY WORDS ARISTONECTINAE MARINE REPTILE PERINATAL UPPER CRETACEOUS WEDDELLIAN PROVINCE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1017/S0954102016000365 2023-09-24T19:41:58Z 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. 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 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 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 Article in Journal/Newspaper Antarctic Science Ross Archipelago Seymour Island CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Marambio ENVELOPE(-56.750,-56.750,-64.283,-64.283) isla Marambio ENVELOPE(-56.635,-56.635,-64.239,-64.239) Ross Archipelago ENVELOPE(167.000,167.000,-77.500,-77.500) Antarctic Science 29 1 61 72 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
topic |
KEY WORDS ARISTONECTINAE MARINE REPTILE PERINATAL UPPER CRETACEOUS WEDDELLIAN PROVINCE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
KEY WORDS ARISTONECTINAE MARINE REPTILE PERINATAL UPPER CRETACEOUS WEDDELLIAN PROVINCE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 O'gorman, Jose Patricio Talevi, Marianella Fernández, Marta Susana Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae) |
topic_facet |
KEY WORDS ARISTONECTINAE MARINE REPTILE PERINATAL UPPER CRETACEOUS WEDDELLIAN PROVINCE https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
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. 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 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 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 |
format |
Article in Journal/Newspaper |
author |
O'gorman, Jose Patricio Talevi, Marianella Fernández, Marta Susana |
author_facet |
O'gorman, Jose Patricio Talevi, Marianella Fernández, Marta Susana |
author_sort |
O'gorman, Jose Patricio |
title |
Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae) |
title_short |
Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae) |
title_full |
Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae) |
title_fullStr |
Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae) |
title_full_unstemmed |
Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae) |
title_sort |
osteology of a perinatal aristonectine (plesiosauria; elasmosauridae) |
publisher |
Cambridge University Press |
url |
http://hdl.handle.net/11336/49655 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-56.635,-56.635,-64.239,-64.239) ENVELOPE(167.000,167.000,-77.500,-77.500) |
geographic |
Argentina Seymour Seymour Island Marambio isla Marambio Ross Archipelago |
geographic_facet |
Argentina Seymour Seymour Island Marambio isla Marambio Ross Archipelago |
genre |
Antarctic Science Ross Archipelago Seymour Island |
genre_facet |
Antarctic Science Ross Archipelago Seymour Island |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102016000365 info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/antarctic-science/article/osteology-of-a-perinatal-aristonectine-plesiosauria-elasmosauridae/CCFD52DC1EE984C2F787FADC04EC9E4F http://hdl.handle.net/11336/49655 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 0954-1020 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1017/S0954102016000365 |
container_title |
Antarctic Science |
container_volume |
29 |
container_issue |
1 |
container_start_page |
61 |
op_container_end_page |
72 |
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1779310294926884864 |