Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica

Autores
O'gorman, Jose Patricio; Olivero, Eduardo Bernardo; Cabrera, Daniel Alfredo
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica. Alcheringa 36, 531-541. ISSN 0311-5518.One of the unresolved problems concerning the palaeobiology of plesiosaurs is the function of gastroliths. A new juvenile specimen referred to Elasmosauridae indet., collected from the Cape Lamb Member of the Snow Hill Island Formation (upper Campanian-lower Maastrichtian) from Cape Lamb, Vega Island, Antarctic Peninsula with gastroliths, provides the opportunity to add information about this issue. The specimen consists of approximately 20% of a partially articulated skeleton including 333 gastroliths. Taphonomic evidence indicates rapid burial and possibly different taphonomic pathways for the dorsal (articulated) and caudal (disarticulated) regions. Analysis of the 333 gastroliths determined the mean major axis to be 14.32 mm, the mean maximum projection sphericity to be 0.7 and the standard deviation to be 1.1. Following Krumbein classification, most of the gastroliths are disk-shaped (35.4%), spheroid (34%) and cylindrical (21.3%). According to Powers's categories, most of the gastroliths are rounded (71.2%). Petrographically, the gastroliths that are larger than 15 mm (major axis) are mostly volcanic rhyolites (78.3%) and fine-grained quartz aggregates (11.6%); together with minor granitic rocks (3.1%), mudstones (3.1%) and aphanitic volcanics (3.9%); similar percentages were present among the smaller clasts. The acidic volcanic clasts likely derive from the volcanic Antarctic Peninsula Group (GPVA; Middle-Upper Jurassic). The mean values for sphericity and oblate-prolate index (OP index) indicate a fluvial origin for the gastroliths. The method of estimation of the maximum prey-size using gastroliths is discussed. The available data provides evidence against the hydrostatic function of the gastroliths because the total weight of the gastroliths is insufficient to modify the hydrostatic balance of the juvenile plesiosaur.
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: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Cabrera, Daniel Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
ANTARCTICA
ELASMOSAURIDAE
GASTROLITHS
PLESIOSAUR
SNOW HILL ISLAND FORMATION
TAPHONOMY
UPPER CRETACEOUS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/94843
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/94843
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, AntarcticaO'gorman, Jose PatricioOlivero, Eduardo BernardoCabrera, Daniel AlfredoANTARCTICAELASMOSAURIDAEGASTROLITHSPLESIOSAURSNOW HILL ISLAND FORMATIONTAPHONOMYUPPER CRETACEOUShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica. Alcheringa 36, 531-541. ISSN 0311-5518.One of the unresolved problems concerning the palaeobiology of plesiosaurs is the function of gastroliths. A new juvenile specimen referred to Elasmosauridae indet., collected from the Cape Lamb Member of the Snow Hill Island Formation (upper Campanian-lower Maastrichtian) from Cape Lamb, Vega Island, Antarctic Peninsula with gastroliths, provides the opportunity to add information about this issue. The specimen consists of approximately 20% of a partially articulated skeleton including 333 gastroliths. Taphonomic evidence indicates rapid burial and possibly different taphonomic pathways for the dorsal (articulated) and caudal (disarticulated) regions. Analysis of the 333 gastroliths determined the mean major axis to be 14.32 mm, the mean maximum projection sphericity to be 0.7 and the standard deviation to be 1.1. Following Krumbein classification, most of the gastroliths are disk-shaped (35.4%), spheroid (34%) and cylindrical (21.3%). According to Powers's categories, most of the gastroliths are rounded (71.2%). Petrographically, the gastroliths that are larger than 15 mm (major axis) are mostly volcanic rhyolites (78.3%) and fine-grained quartz aggregates (11.6%); together with minor granitic rocks (3.1%), mudstones (3.1%) and aphanitic volcanics (3.9%); similar percentages were present among the smaller clasts. The acidic volcanic clasts likely derive from the volcanic Antarctic Peninsula Group (GPVA; Middle-Upper Jurassic). The mean values for sphericity and oblate-prolate index (OP index) indicate a fluvial origin for the gastroliths. The method of estimation of the maximum prey-size using gastroliths is discussed. The available data provides evidence against the hydrostatic function of the gastroliths because the total weight of the gastroliths is insufficient to modify the hydrostatic balance of the juvenile plesiosaur.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; ArgentinaFil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Cabrera, Daniel Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaTaylor & Francis Ltd2012-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/94843O'gorman, Jose Patricio; Olivero, Eduardo Bernardo; Cabrera, Daniel Alfredo; Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica; Taylor & Francis Ltd; Alcheringa; 36; 4; 12-2012; 531-5410311-5518CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1080/03115518.2012.688673info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1080/03115518.2012.688673info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:28:01Zoai:ri.conicet.gov.ar:11336/94843instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:28:01.429CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica
title Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica
spellingShingle Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica
O'gorman, Jose Patricio
ANTARCTICA
ELASMOSAURIDAE
GASTROLITHS
PLESIOSAUR
SNOW HILL ISLAND FORMATION
TAPHONOMY
UPPER CRETACEOUS
title_short Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica
title_full Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica
title_fullStr Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica
title_full_unstemmed Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica
title_sort Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica
dc.creator.none.fl_str_mv O'gorman, Jose Patricio
Olivero, Eduardo Bernardo
Cabrera, Daniel Alfredo
author O'gorman, Jose Patricio
author_facet O'gorman, Jose Patricio
Olivero, Eduardo Bernardo
Cabrera, Daniel Alfredo
author_role author
author2 Olivero, Eduardo Bernardo
Cabrera, Daniel Alfredo
author2_role author
author
dc.subject.none.fl_str_mv ANTARCTICA
ELASMOSAURIDAE
GASTROLITHS
PLESIOSAUR
SNOW HILL ISLAND FORMATION
TAPHONOMY
UPPER CRETACEOUS
topic ANTARCTICA
ELASMOSAURIDAE
GASTROLITHS
PLESIOSAUR
SNOW HILL ISLAND FORMATION
TAPHONOMY
UPPER CRETACEOUS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica. Alcheringa 36, 531-541. ISSN 0311-5518.One of the unresolved problems concerning the palaeobiology of plesiosaurs is the function of gastroliths. A new juvenile specimen referred to Elasmosauridae indet., collected from the Cape Lamb Member of the Snow Hill Island Formation (upper Campanian-lower Maastrichtian) from Cape Lamb, Vega Island, Antarctic Peninsula with gastroliths, provides the opportunity to add information about this issue. The specimen consists of approximately 20% of a partially articulated skeleton including 333 gastroliths. Taphonomic evidence indicates rapid burial and possibly different taphonomic pathways for the dorsal (articulated) and caudal (disarticulated) regions. Analysis of the 333 gastroliths determined the mean major axis to be 14.32 mm, the mean maximum projection sphericity to be 0.7 and the standard deviation to be 1.1. Following Krumbein classification, most of the gastroliths are disk-shaped (35.4%), spheroid (34%) and cylindrical (21.3%). According to Powers's categories, most of the gastroliths are rounded (71.2%). Petrographically, the gastroliths that are larger than 15 mm (major axis) are mostly volcanic rhyolites (78.3%) and fine-grained quartz aggregates (11.6%); together with minor granitic rocks (3.1%), mudstones (3.1%) and aphanitic volcanics (3.9%); similar percentages were present among the smaller clasts. The acidic volcanic clasts likely derive from the volcanic Antarctic Peninsula Group (GPVA; Middle-Upper Jurassic). The mean values for sphericity and oblate-prolate index (OP index) indicate a fluvial origin for the gastroliths. The method of estimation of the maximum prey-size using gastroliths is discussed. The available data provides evidence against the hydrostatic function of the gastroliths because the total weight of the gastroliths is insufficient to modify the hydrostatic balance of the juvenile plesiosaur.
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: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Cabrera, Daniel Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica. Alcheringa 36, 531-541. ISSN 0311-5518.One of the unresolved problems concerning the palaeobiology of plesiosaurs is the function of gastroliths. A new juvenile specimen referred to Elasmosauridae indet., collected from the Cape Lamb Member of the Snow Hill Island Formation (upper Campanian-lower Maastrichtian) from Cape Lamb, Vega Island, Antarctic Peninsula with gastroliths, provides the opportunity to add information about this issue. The specimen consists of approximately 20% of a partially articulated skeleton including 333 gastroliths. Taphonomic evidence indicates rapid burial and possibly different taphonomic pathways for the dorsal (articulated) and caudal (disarticulated) regions. Analysis of the 333 gastroliths determined the mean major axis to be 14.32 mm, the mean maximum projection sphericity to be 0.7 and the standard deviation to be 1.1. Following Krumbein classification, most of the gastroliths are disk-shaped (35.4%), spheroid (34%) and cylindrical (21.3%). According to Powers's categories, most of the gastroliths are rounded (71.2%). Petrographically, the gastroliths that are larger than 15 mm (major axis) are mostly volcanic rhyolites (78.3%) and fine-grained quartz aggregates (11.6%); together with minor granitic rocks (3.1%), mudstones (3.1%) and aphanitic volcanics (3.9%); similar percentages were present among the smaller clasts. The acidic volcanic clasts likely derive from the volcanic Antarctic Peninsula Group (GPVA; Middle-Upper Jurassic). The mean values for sphericity and oblate-prolate index (OP index) indicate a fluvial origin for the gastroliths. The method of estimation of the maximum prey-size using gastroliths is discussed. The available data provides evidence against the hydrostatic function of the gastroliths because the total weight of the gastroliths is insufficient to modify the hydrostatic balance of the juvenile plesiosaur.
publishDate 2012
dc.date.none.fl_str_mv 2012-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/94843
O'gorman, Jose Patricio; Olivero, Eduardo Bernardo; Cabrera, Daniel Alfredo; Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica; Taylor & Francis Ltd; Alcheringa; 36; 4; 12-2012; 531-541
0311-5518
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94843
identifier_str_mv O'gorman, Jose Patricio; Olivero, Eduardo Bernardo; Cabrera, Daniel Alfredo; Gastroliths associated with a juvenile elasmosaur (Plesiosauria, Elasmosauridae) from the Snow Hill Island Formation (upper Campanian-lower Maastrichtian), Vega Island, Antarctica; Taylor & Francis Ltd; Alcheringa; 36; 4; 12-2012; 531-541
0311-5518
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1080/03115518.2012.688673
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1080/03115518.2012.688673
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Taylor & Francis Ltd
publisher.none.fl_str_mv Taylor & Francis Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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