New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal and sacral regions of elasmosaurids
Elasmosaurids are among the most frequently recorded marine reptile fossils from the Campanian–Maastrichtian strata of Antarctica. Here, we describe one of the earliest quarried specimens, MLP 82-I-28-1, which is identified as a non-aristonectine elasmosaurid and phylogenetically nested within Wedde...
| Published in: | Alcheringa: An Australasian Journal of Palaeontology |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Taylor & Francis Ltd
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| Online Access: | http://hdl.handle.net/11336/217272 |
| _version_ | 1821776989101490176 |
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| author | O'gorman, Jose Patricio Aspromonte, Franco Roger Reguero, Marcelo Alfredo |
| author_facet | O'gorman, Jose Patricio Aspromonte, Franco Roger Reguero, Marcelo Alfredo |
| author_sort | O'gorman, Jose Patricio |
| collection | CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
| container_issue | 3 |
| container_start_page | 354 |
| container_title | Alcheringa: An Australasian Journal of Palaeontology |
| container_volume | 45 |
| description | Elasmosaurids are among the most frequently recorded marine reptile fossils from the Campanian–Maastrichtian strata of Antarctica. Here, we describe one of the earliest quarried specimens, MLP 82-I-28-1, which is identified as a non-aristonectine elasmosaurid and phylogenetically nested within Weddellonectia. An ancestral states analysis of dorsal and sacral vertebral counts suggests that weddellonectian elasmosaurids plesiomorphically possessed between 17 and 18 dorsal vertebrae. The comparatively high count of 24 dorsal vertebrae observed in aristonectine elasmosaurids, such as Aristonectes quiriquinensis, thus likely represents a derived state correlated with the acquisition of larger body size. Fil: O'gorman, Jose Patricio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Aspromonte, Franco Roger. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Reguero, Marcelo Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina |
| format | Article in Journal/Newspaper |
| genre | Antarc* Antarctica |
| genre_facet | Antarc* Antarctica |
| geographic | Argentina |
| geographic_facet | Argentina |
| id | ftconicet:oai:ri.conicet.gov.ar:11336/217272 |
| institution | Open Polar |
| language | English |
| op_collection_id | ftconicet |
| op_container_end_page | 368 |
| op_doi | https://doi.org/10.1080/03115518.2021.1958378 |
| op_relation | info:eu-repo/semantics/altIdentifier/doi/10.1080/03115518.2021.1958378 http://hdl.handle.net/11336/217272 CONICET Digital CONICET |
| op_rights | info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
| publisher | Taylor & Francis Ltd |
| record_format | openpolar |
| spelling | ftconicet:oai:ri.conicet.gov.ar:11336/217272 2025-01-16T19:42:23+00:00 New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal and sacral regions of elasmosaurids O'gorman, Jose Patricio Aspromonte, Franco Roger Reguero, Marcelo Alfredo application/pdf http://hdl.handle.net/11336/217272 eng eng Taylor & Francis Ltd info:eu-repo/semantics/altIdentifier/doi/10.1080/03115518.2021.1958378 http://hdl.handle.net/11336/217272 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ELASMOSAURIDAE LÓPEZ DE BERTODANO FORMATION MAASTRICHTIAN WEDDELLONECTIA 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/10.1080/03115518.2021.1958378 2024-10-04T09:34:17Z Elasmosaurids are among the most frequently recorded marine reptile fossils from the Campanian–Maastrichtian strata of Antarctica. Here, we describe one of the earliest quarried specimens, MLP 82-I-28-1, which is identified as a non-aristonectine elasmosaurid and phylogenetically nested within Weddellonectia. An ancestral states analysis of dorsal and sacral vertebral counts suggests that weddellonectian elasmosaurids plesiomorphically possessed between 17 and 18 dorsal vertebrae. The comparatively high count of 24 dorsal vertebrae observed in aristonectine elasmosaurids, such as Aristonectes quiriquinensis, thus likely represents a derived state correlated with the acquisition of larger body size. Fil: O'gorman, Jose Patricio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Aspromonte, Franco Roger. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Reguero, Marcelo Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Article in Journal/Newspaper Antarc* Antarctica CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Alcheringa: An Australasian Journal of Palaeontology 45 3 354 368 |
| spellingShingle | ELASMOSAURIDAE LÓPEZ DE BERTODANO FORMATION MAASTRICHTIAN WEDDELLONECTIA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 O'gorman, Jose Patricio Aspromonte, Franco Roger Reguero, Marcelo Alfredo New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal and sacral regions of elasmosaurids |
| title | New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal and sacral regions of elasmosaurids |
| title_full | New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal and sacral regions of elasmosaurids |
| title_fullStr | New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal and sacral regions of elasmosaurids |
| title_full_unstemmed | New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal and sacral regions of elasmosaurids |
| title_short | New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal and sacral regions of elasmosaurids |
| title_sort | new data on one of the first plesiosaur (reptilia, sauropterygia) skeletons recovered from antarctica, with comments on the dorsal and sacral regions of elasmosaurids |
| topic | ELASMOSAURIDAE LÓPEZ DE BERTODANO FORMATION MAASTRICHTIAN WEDDELLONECTIA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| topic_facet | ELASMOSAURIDAE LÓPEZ DE BERTODANO FORMATION MAASTRICHTIAN WEDDELLONECTIA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| url | http://hdl.handle.net/11336/217272 |