Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica

Autores
Barreda, Viviana Dora; Palazzesi, Luis; Tellería, María Cristina; Olivero, Eduardo B.; Raine, J. Ian; Forest, Félix
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Asteraceae (sunflowers and daisies) are the most diverse family of flowering plants. Despite their prominent role in extant terrestrial ecosystems, the early evolutionary history of this family remains poorly understood. Here we report the discovery of a number of fossil pollen grains preserved in dinosaur-bearing deposits from the Late Cretaceous of Antarctica that drastically pushes back the timing of assumed origin of the family. Reliably dated to ∼76–66 Mya, these specimens are about 20 million years older than previously known records for the Asteraceae. Using a phylogenetic approach, we interpreted these fossil specimens as members of an extinct early diverging clade of the family, associated with subfamily Barnadesioideae. Based on a molecular phylogenetic tree calibrated using fossils, including the ones reported here, we estimated that the most recent common ancestor of the family lived at least 80 Mya in Gondwana, well before the thermal and biogeographical isolation of Antarctica. Most of the early diverging lineages of the family originated in a narrow time interval after the K/P boundary, 60–50 Mya, coinciding with a pronounced climatic warming during the Late Paleocene and Early Eocene, and the scene of a dramatic rise in flowering plant diversity. Our age estimates reduce earlier discrepancies between the age of the fossil record and previous molecular estimates for the origin of the family, bearing important implications in the evolution of flowering plants in general.
Los datos utilizados en este trabajo pueden accederse haciendo clic en "Documentos relacionados".
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Asteraceae
evolution
Antarctica
fossil
phylogenetics
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/105821

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spelling Early evolution of the angiosperm clade Asteraceae in the Cretaceous of AntarcticaBarreda, Viviana DoraPalazzesi, LuisTellería, María CristinaOlivero, Eduardo B.Raine, J. IanForest, FélixCiencias NaturalesAsteraceaeevolutionAntarcticafossilphylogeneticsThe Asteraceae (sunflowers and daisies) are the most diverse family of flowering plants. Despite their prominent role in extant terrestrial ecosystems, the early evolutionary history of this family remains poorly understood. Here we report the discovery of a number of fossil pollen grains preserved in dinosaur-bearing deposits from the Late Cretaceous of Antarctica that drastically pushes back the timing of assumed origin of the family. Reliably dated to ∼76–66 Mya, these specimens are about 20 million years older than previously known records for the Asteraceae. Using a phylogenetic approach, we interpreted these fossil specimens as members of an extinct early diverging clade of the family, associated with subfamily Barnadesioideae. Based on a molecular phylogenetic tree calibrated using fossils, including the ones reported here, we estimated that the most recent common ancestor of the family lived at least 80 Mya in Gondwana, well before the thermal and biogeographical isolation of Antarctica. Most of the early diverging lineages of the family originated in a narrow time interval after the K/P boundary, 60–50 Mya, coinciding with a pronounced climatic warming during the Late Paleocene and Early Eocene, and the scene of a dramatic rise in flowering plant diversity. Our age estimates reduce earlier discrepancies between the age of the fossil record and previous molecular estimates for the origin of the family, bearing important implications in the evolution of flowering plants in general.Los datos utilizados en este trabajo pueden accederse haciendo clic en "Documentos relacionados".Facultad de Ciencias Naturales y Museo2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf10989–10994http://sedici.unlp.edu.ar/handle/10915/105821enginfo:eu-repo/semantics/altIdentifier/issn/1091-6490info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1423653112info:eu-repo/semantics/reference/hdl/10915/105823info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:23:41Zoai:sedici.unlp.edu.ar:10915/105821Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:23:42.296SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
title Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
spellingShingle Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
Barreda, Viviana Dora
Ciencias Naturales
Asteraceae
evolution
Antarctica
fossil
phylogenetics
title_short Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
title_full Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
title_fullStr Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
title_full_unstemmed Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
title_sort Early evolution of the angiosperm clade Asteraceae in the Cretaceous of Antarctica
dc.creator.none.fl_str_mv Barreda, Viviana Dora
Palazzesi, Luis
Tellería, María Cristina
Olivero, Eduardo B.
Raine, J. Ian
Forest, Félix
author Barreda, Viviana Dora
author_facet Barreda, Viviana Dora
Palazzesi, Luis
Tellería, María Cristina
Olivero, Eduardo B.
Raine, J. Ian
Forest, Félix
author_role author
author2 Palazzesi, Luis
Tellería, María Cristina
Olivero, Eduardo B.
Raine, J. Ian
Forest, Félix
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Asteraceae
evolution
Antarctica
fossil
phylogenetics
topic Ciencias Naturales
Asteraceae
evolution
Antarctica
fossil
phylogenetics
dc.description.none.fl_txt_mv The Asteraceae (sunflowers and daisies) are the most diverse family of flowering plants. Despite their prominent role in extant terrestrial ecosystems, the early evolutionary history of this family remains poorly understood. Here we report the discovery of a number of fossil pollen grains preserved in dinosaur-bearing deposits from the Late Cretaceous of Antarctica that drastically pushes back the timing of assumed origin of the family. Reliably dated to ∼76–66 Mya, these specimens are about 20 million years older than previously known records for the Asteraceae. Using a phylogenetic approach, we interpreted these fossil specimens as members of an extinct early diverging clade of the family, associated with subfamily Barnadesioideae. Based on a molecular phylogenetic tree calibrated using fossils, including the ones reported here, we estimated that the most recent common ancestor of the family lived at least 80 Mya in Gondwana, well before the thermal and biogeographical isolation of Antarctica. Most of the early diverging lineages of the family originated in a narrow time interval after the K/P boundary, 60–50 Mya, coinciding with a pronounced climatic warming during the Late Paleocene and Early Eocene, and the scene of a dramatic rise in flowering plant diversity. Our age estimates reduce earlier discrepancies between the age of the fossil record and previous molecular estimates for the origin of the family, bearing important implications in the evolution of flowering plants in general.
Los datos utilizados en este trabajo pueden accederse haciendo clic en "Documentos relacionados".
Facultad de Ciencias Naturales y Museo
description The Asteraceae (sunflowers and daisies) are the most diverse family of flowering plants. Despite their prominent role in extant terrestrial ecosystems, the early evolutionary history of this family remains poorly understood. Here we report the discovery of a number of fossil pollen grains preserved in dinosaur-bearing deposits from the Late Cretaceous of Antarctica that drastically pushes back the timing of assumed origin of the family. Reliably dated to ∼76–66 Mya, these specimens are about 20 million years older than previously known records for the Asteraceae. Using a phylogenetic approach, we interpreted these fossil specimens as members of an extinct early diverging clade of the family, associated with subfamily Barnadesioideae. Based on a molecular phylogenetic tree calibrated using fossils, including the ones reported here, we estimated that the most recent common ancestor of the family lived at least 80 Mya in Gondwana, well before the thermal and biogeographical isolation of Antarctica. Most of the early diverging lineages of the family originated in a narrow time interval after the K/P boundary, 60–50 Mya, coinciding with a pronounced climatic warming during the Late Paleocene and Early Eocene, and the scene of a dramatic rise in flowering plant diversity. Our age estimates reduce earlier discrepancies between the age of the fossil record and previous molecular estimates for the origin of the family, bearing important implications in the evolution of flowering plants in general.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/105821
url http://sedici.unlp.edu.ar/handle/10915/105821
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1091-6490
info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1423653112
info:eu-repo/semantics/reference/hdl/10915/105823
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
10989–10994
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