A dromaeosaur from the Maastrichtian of James Ross Island and the Late

Autores
Case, J. A.; Martin, J. E.; Reguero, Marcelo Alfredo
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The recovery of material of a small theropod from the Early Maastrichtian, Cape Lamb Member of the Snow Hill Island Formation is an unusual occurrence from primarily marine sediments. The pedal morphology of the specimen that includes a Metatarsal II with a lateral expansion caudal to Metatarsal III, a third metatarsal that is proximally narrow and distally wide, a Metatarsal III with a distal end that is incipiently ginglymoidal and a second pedal digit with sickle-like ungual are all diagnostic of a theropod that belongs to the family of predatory dinosaurs, the Dromaeosauridae. Yet this Antarctic dromaeosaur retains plesiomorphic features in its ankle and foot morphology. As new dromaeosaur species are being recovered from the mid-Cretaceous of South America and the retention of primitive characters in the Antarctic dromaeosaur, a new biogeographic hypothesis on dromaeosaur distribution has been generated. Gondwanan dromaeosaurs are not North America immigrants into South America and Antarctica; rather they are the relicts of a cosmopolitan dromaeosaur distribution, which has been separated by the vicariant break up of Pangea and created an endemic clade of dromaeosaurs in Gondwana.
Fil: Case, J. A.. Eastern Washington University; Estados Unidos
Fil: Martin, J. E.. South Dakota School of Mines & Technology; Estados Unidos
Fil: Reguero, Marcelo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Materia
Antarctica
James Ross Island
Dinosaur
Late 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:11336/241818
Acceder
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spelling A dromaeosaur from the Maastrichtian of James Ross Island and the LateCase, J. A.Martin, J. E.Reguero, Marcelo AlfredoAntarcticaJames Ross IslandDinosaurLate Cretaceoushttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The recovery of material of a small theropod from the Early Maastrichtian, Cape Lamb Member of the Snow Hill Island Formation is an unusual occurrence from primarily marine sediments. The pedal morphology of the specimen that includes a Metatarsal II with a lateral expansion caudal to Metatarsal III, a third metatarsal that is proximally narrow and distally wide, a Metatarsal III with a distal end that is incipiently ginglymoidal and a second pedal digit with sickle-like ungual are all diagnostic of a theropod that belongs to the family of predatory dinosaurs, the Dromaeosauridae. Yet this Antarctic dromaeosaur retains plesiomorphic features in its ankle and foot morphology. As new dromaeosaur species are being recovered from the mid-Cretaceous of South America and the retention of primitive characters in the Antarctic dromaeosaur, a new biogeographic hypothesis on dromaeosaur distribution has been generated. Gondwanan dromaeosaurs are not North America immigrants into South America and Antarctica; rather they are the relicts of a cosmopolitan dromaeosaur distribution, which has been separated by the vicariant break up of Pangea and created an endemic clade of dromaeosaurs in Gondwana.Fil: Case, J. A.. Eastern Washington University; Estados UnidosFil: Martin, J. E.. South Dakota School of Mines & Technology; Estados UnidosFil: Reguero, Marcelo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; ArgentinaUS Geological Society2007-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/241818Case, J. A.; Martin, J. E.; Reguero, Marcelo Alfredo; A dromaeosaur from the Maastrichtian of James Ross Island and the Late; US Geological Society; U.S. Geological Survey and The National Academies; 083; 3-2007; 1-40701-8738CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.usgs.gov/publication/ofr20071047SRP083info:eu-repo/semantics/altIdentifier/doi/10.3133/ofr20071047SRP083info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:55:47Zoai:ri.conicet.gov.ar:11336/241818instacron: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 09:55:47.461CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A dromaeosaur from the Maastrichtian of James Ross Island and the Late
title A dromaeosaur from the Maastrichtian of James Ross Island and the Late
spellingShingle A dromaeosaur from the Maastrichtian of James Ross Island and the Late
Case, J. A.
Antarctica
James Ross Island
Dinosaur
Late Cretaceous
title_short A dromaeosaur from the Maastrichtian of James Ross Island and the Late
title_full A dromaeosaur from the Maastrichtian of James Ross Island and the Late
title_fullStr A dromaeosaur from the Maastrichtian of James Ross Island and the Late
title_full_unstemmed A dromaeosaur from the Maastrichtian of James Ross Island and the Late
title_sort A dromaeosaur from the Maastrichtian of James Ross Island and the Late
dc.creator.none.fl_str_mv Case, J. A.
Martin, J. E.
Reguero, Marcelo Alfredo
author Case, J. A.
author_facet Case, J. A.
Martin, J. E.
Reguero, Marcelo Alfredo
author_role author
author2 Martin, J. E.
Reguero, Marcelo Alfredo
author2_role author
author
dc.subject.none.fl_str_mv Antarctica
James Ross Island
Dinosaur
Late Cretaceous
topic Antarctica
James Ross Island
Dinosaur
Late Cretaceous
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The recovery of material of a small theropod from the Early Maastrichtian, Cape Lamb Member of the Snow Hill Island Formation is an unusual occurrence from primarily marine sediments. The pedal morphology of the specimen that includes a Metatarsal II with a lateral expansion caudal to Metatarsal III, a third metatarsal that is proximally narrow and distally wide, a Metatarsal III with a distal end that is incipiently ginglymoidal and a second pedal digit with sickle-like ungual are all diagnostic of a theropod that belongs to the family of predatory dinosaurs, the Dromaeosauridae. Yet this Antarctic dromaeosaur retains plesiomorphic features in its ankle and foot morphology. As new dromaeosaur species are being recovered from the mid-Cretaceous of South America and the retention of primitive characters in the Antarctic dromaeosaur, a new biogeographic hypothesis on dromaeosaur distribution has been generated. Gondwanan dromaeosaurs are not North America immigrants into South America and Antarctica; rather they are the relicts of a cosmopolitan dromaeosaur distribution, which has been separated by the vicariant break up of Pangea and created an endemic clade of dromaeosaurs in Gondwana.
Fil: Case, J. A.. Eastern Washington University; Estados Unidos
Fil: Martin, J. E.. South Dakota School of Mines & Technology; Estados Unidos
Fil: Reguero, Marcelo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
description The recovery of material of a small theropod from the Early Maastrichtian, Cape Lamb Member of the Snow Hill Island Formation is an unusual occurrence from primarily marine sediments. The pedal morphology of the specimen that includes a Metatarsal II with a lateral expansion caudal to Metatarsal III, a third metatarsal that is proximally narrow and distally wide, a Metatarsal III with a distal end that is incipiently ginglymoidal and a second pedal digit with sickle-like ungual are all diagnostic of a theropod that belongs to the family of predatory dinosaurs, the Dromaeosauridae. Yet this Antarctic dromaeosaur retains plesiomorphic features in its ankle and foot morphology. As new dromaeosaur species are being recovered from the mid-Cretaceous of South America and the retention of primitive characters in the Antarctic dromaeosaur, a new biogeographic hypothesis on dromaeosaur distribution has been generated. Gondwanan dromaeosaurs are not North America immigrants into South America and Antarctica; rather they are the relicts of a cosmopolitan dromaeosaur distribution, which has been separated by the vicariant break up of Pangea and created an endemic clade of dromaeosaurs in Gondwana.
publishDate 2007
dc.date.none.fl_str_mv 2007-03
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/11336/241818
Case, J. A.; Martin, J. E.; Reguero, Marcelo Alfredo; A dromaeosaur from the Maastrichtian of James Ross Island and the Late; US Geological Society; U.S. Geological Survey and The National Academies; 083; 3-2007; 1-4
0701-8738
CONICET Digital
CONICET
url http://hdl.handle.net/11336/241818
identifier_str_mv Case, J. A.; Martin, J. E.; Reguero, Marcelo Alfredo; A dromaeosaur from the Maastrichtian of James Ross Island and the Late; US Geological Society; U.S. Geological Survey and The National Academies; 083; 3-2007; 1-4
0701-8738
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.usgs.gov/publication/ofr20071047SRP083
info:eu-repo/semantics/altIdentifier/doi/10.3133/ofr20071047SRP083
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
dc.publisher.none.fl_str_mv US Geological Society
publisher.none.fl_str_mv US Geological Society
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 13.069144

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