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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/105821
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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 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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http://sedici.unlp.edu.ar/handle/10915/105821 |
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eng |
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eng |
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