A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere

Autores
Agnolin, Federico; Brissón Egli, Federico; García Marsa, Jordi Alexis; Novas, Fernando Emilio
Año de publicación
2017
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The fossil record of Late Cretaceous-Paleogene modern birds in the Southern Hemisphere is patchy. It includes the Maastrichtian Neogaeornis wetzeli, represented by an isolated tarsometatarsus from Chile, and Polarornis gregorii and Vegavis iaai, from Antarctica, as well as Australornis lovei, from the Paleogene of New Zealand. Phylogenetic relationships of these taxa, as well as diverse isolated materials from Paleogene and Cretaceous beds of Antarctica have been variously interpreted by different authors. The recent finding of a new and nearly complete Vegavis skeleton constitutes the most informative source for anatomical comparisons between Australornis, Polarornis, Vegavis, and other specimens. Present contribution includes for the first time Vegavis, Polarornis, and Australornis in an abarcative phylogenetic analysis. This analysis resulted in the recognition of these taxa as a monophyletic clade at the base of Anseriformes. They share a combination of characters related to diving adaptations, including compact and thickened cortex of hindlimb bones, femur with anteroposteriorly compressed and bowed shaft, deep and wide popliteal fossa delimited by a medial ridge, tibiotarsus showing notably proximally expanded cnemial crests, expanded fibular crest, anteroposterior compression of the tibial shaft, and a tarsometatarsus with a strong transverse compression of the shaft. This evidence, plus isolated bones coming from Cretaceous and Paleogene of South America, Antarctica, and New Zealand, support the view that they constitute a new clade of basal anseriforms. Moreover, they represent the first avian lineage to have confidently crossed the K-Pg boundary, supporting that some avian clades were not affected by the end Mesozoic mass extinction event, countering previous interpretations.
Fil: Agnolin, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Fundación de Historia Natural Félix de Azara; Argentina. Universidad Maimónides; Argentina
Fil: Brissón Egli, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: García Marsa, Jordi Alexis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Novas, Fernando Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
XXXI Jornadas Argentinas de Paleontología de Vertebrados
Mar Chiquita
Argentina
Asociación Paleontológica Argentina
Materia
VEGAVIIDAE
NEORNITHES
ANTARTIDA
CRETACEOUS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/275807
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/275807
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern HemisphereAgnolin, FedericoBrissón Egli, FedericoGarcía Marsa, Jordi AlexisNovas, Fernando EmilioVEGAVIIDAENEORNITHESANTARTIDACRETACEOUShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The fossil record of Late Cretaceous-Paleogene modern birds in the Southern Hemisphere is patchy. It includes the Maastrichtian Neogaeornis wetzeli, represented by an isolated tarsometatarsus from Chile, and Polarornis gregorii and Vegavis iaai, from Antarctica, as well as Australornis lovei, from the Paleogene of New Zealand. Phylogenetic relationships of these taxa, as well as diverse isolated materials from Paleogene and Cretaceous beds of Antarctica have been variously interpreted by different authors. The recent finding of a new and nearly complete Vegavis skeleton constitutes the most informative source for anatomical comparisons between Australornis, Polarornis, Vegavis, and other specimens. Present contribution includes for the first time Vegavis, Polarornis, and Australornis in an abarcative phylogenetic analysis. This analysis resulted in the recognition of these taxa as a monophyletic clade at the base of Anseriformes. They share a combination of characters related to diving adaptations, including compact and thickened cortex of hindlimb bones, femur with anteroposteriorly compressed and bowed shaft, deep and wide popliteal fossa delimited by a medial ridge, tibiotarsus showing notably proximally expanded cnemial crests, expanded fibular crest, anteroposterior compression of the tibial shaft, and a tarsometatarsus with a strong transverse compression of the shaft. This evidence, plus isolated bones coming from Cretaceous and Paleogene of South America, Antarctica, and New Zealand, support the view that they constitute a new clade of basal anseriforms. Moreover, they represent the first avian lineage to have confidently crossed the K-Pg boundary, supporting that some avian clades were not affected by the end Mesozoic mass extinction event, countering previous interpretations.Fil: Agnolin, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Fundación de Historia Natural Félix de Azara; Argentina. Universidad Maimónides; ArgentinaFil: Brissón Egli, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: García Marsa, Jordi Alexis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Novas, Fernando Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaXXXI Jornadas Argentinas de Paleontología de VertebradosMar ChiquitaArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2017info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectJornadaJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/275807A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere; XXXI Jornadas Argentinas de Paleontología de Vertebrados; Mar Chiquita; Argentina; 2017; 66-662469-0228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://peapaleontologica.org.ar/index.php/peapa/article/view/278Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-23T14:39:51Zoai:ri.conicet.gov.ar:11336/275807instacron: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:34982025-12-23 14:39:52.16CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere
title A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere
spellingShingle A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere
Agnolin, Federico
VEGAVIIDAE
NEORNITHES
ANTARTIDA
CRETACEOUS
title_short A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere
title_full A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere
title_fullStr A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere
title_full_unstemmed A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere
title_sort A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere
dc.creator.none.fl_str_mv Agnolin, Federico
Brissón Egli, Federico
García Marsa, Jordi Alexis
Novas, Fernando Emilio
author Agnolin, Federico
author_facet Agnolin, Federico
Brissón Egli, Federico
García Marsa, Jordi Alexis
Novas, Fernando Emilio
author_role author
author2 Brissón Egli, Federico
García Marsa, Jordi Alexis
Novas, Fernando Emilio
author2_role author
author
author
dc.subject.none.fl_str_mv VEGAVIIDAE
NEORNITHES
ANTARTIDA
CRETACEOUS
topic VEGAVIIDAE
NEORNITHES
ANTARTIDA
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 fossil record of Late Cretaceous-Paleogene modern birds in the Southern Hemisphere is patchy. It includes the Maastrichtian Neogaeornis wetzeli, represented by an isolated tarsometatarsus from Chile, and Polarornis gregorii and Vegavis iaai, from Antarctica, as well as Australornis lovei, from the Paleogene of New Zealand. Phylogenetic relationships of these taxa, as well as diverse isolated materials from Paleogene and Cretaceous beds of Antarctica have been variously interpreted by different authors. The recent finding of a new and nearly complete Vegavis skeleton constitutes the most informative source for anatomical comparisons between Australornis, Polarornis, Vegavis, and other specimens. Present contribution includes for the first time Vegavis, Polarornis, and Australornis in an abarcative phylogenetic analysis. This analysis resulted in the recognition of these taxa as a monophyletic clade at the base of Anseriformes. They share a combination of characters related to diving adaptations, including compact and thickened cortex of hindlimb bones, femur with anteroposteriorly compressed and bowed shaft, deep and wide popliteal fossa delimited by a medial ridge, tibiotarsus showing notably proximally expanded cnemial crests, expanded fibular crest, anteroposterior compression of the tibial shaft, and a tarsometatarsus with a strong transverse compression of the shaft. This evidence, plus isolated bones coming from Cretaceous and Paleogene of South America, Antarctica, and New Zealand, support the view that they constitute a new clade of basal anseriforms. Moreover, they represent the first avian lineage to have confidently crossed the K-Pg boundary, supporting that some avian clades were not affected by the end Mesozoic mass extinction event, countering previous interpretations.
Fil: Agnolin, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Fundación de Historia Natural Félix de Azara; Argentina. Universidad Maimónides; Argentina
Fil: Brissón Egli, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: García Marsa, Jordi Alexis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Novas, Fernando Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
XXXI Jornadas Argentinas de Paleontología de Vertebrados
Mar Chiquita
Argentina
Asociación Paleontológica Argentina
description The fossil record of Late Cretaceous-Paleogene modern birds in the Southern Hemisphere is patchy. It includes the Maastrichtian Neogaeornis wetzeli, represented by an isolated tarsometatarsus from Chile, and Polarornis gregorii and Vegavis iaai, from Antarctica, as well as Australornis lovei, from the Paleogene of New Zealand. Phylogenetic relationships of these taxa, as well as diverse isolated materials from Paleogene and Cretaceous beds of Antarctica have been variously interpreted by different authors. The recent finding of a new and nearly complete Vegavis skeleton constitutes the most informative source for anatomical comparisons between Australornis, Polarornis, Vegavis, and other specimens. Present contribution includes for the first time Vegavis, Polarornis, and Australornis in an abarcative phylogenetic analysis. This analysis resulted in the recognition of these taxa as a monophyletic clade at the base of Anseriformes. They share a combination of characters related to diving adaptations, including compact and thickened cortex of hindlimb bones, femur with anteroposteriorly compressed and bowed shaft, deep and wide popliteal fossa delimited by a medial ridge, tibiotarsus showing notably proximally expanded cnemial crests, expanded fibular crest, anteroposterior compression of the tibial shaft, and a tarsometatarsus with a strong transverse compression of the shaft. This evidence, plus isolated bones coming from Cretaceous and Paleogene of South America, Antarctica, and New Zealand, support the view that they constitute a new clade of basal anseriforms. Moreover, they represent the first avian lineage to have confidently crossed the K-Pg boundary, supporting that some avian clades were not affected by the end Mesozoic mass extinction event, countering previous interpretations.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Jornada
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/275807
A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere; XXXI Jornadas Argentinas de Paleontología de Vertebrados; Mar Chiquita; Argentina; 2017; 66-66
2469-0228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/275807
identifier_str_mv A new clade of diving modern birds from the Cretaceous and Paleogente of the Southern Hemisphere; XXXI Jornadas Argentinas de Paleontología de Vertebrados; Mar Chiquita; Argentina; 2017; 66-66
2469-0228
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://peapaleontologica.org.ar/index.php/peapa/article/view/278
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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reponame_str CONICET Digital (CONICET)
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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