An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications
- Autores
- Barreda, Viviana D.; Palazzesi, Luis; Katinas, Liliana; Crisci, Jorge Víctor; Tellería, María Cristina; Bremer, Kåre; Passala, Mauro G.; Bechis, Florencia; Corsolini, Rodolfo
- Año de publicación
- 2012
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Background and Aims: Morphological, molecular and biogeographical information bearing on early evolution of the sunflower alliance of families suggests that the clade containing the extant daisy family (Asteraceae) differentiated in South America during the Eocene, although palaeontological studies on this continent failed to reveal conclusive support for this hypothesis. Here we describe in detail Raiguenrayun cura gen. & sp. nov., an exceptionally well preserved capitulescence of Asteraceae recovered from Eocene deposits of northwestern Patagonia, Argentina. Methods: The fossil was collected from the 47·5 million-year-old Huitrera Formation at the Estancia Don Hiplito locality, Ro Negro Province, Argentina. Key Results: The arrangement of the capitula in a cymose capitulescence, the many-flowered capitula with multiseriateimbricate involucral bracts and the pappus-like structures indicate a close morphological relationship with Asteraceae. Raiguenrayun cura and the associated pollen Mutisiapollis telleriae do not match exactly any living member of the family, and clearly represent extinct taxa. They share a mosaic of morphological features today recognized in taxa phylogenetically close to the root of Asteraceae, such as Stifftieae, Wunderlichioideae and Gochnatieae (Mutisioideae sensu lato) and Dicomeae and Oldenburgieae (Carduoideae), today endemic to or mainly distributed in South America and Africa, respectively. Conclusions: This is the first fossil genus of Asteraceae based on an outstandingly preserved capitulescence that might represent the ancestor of MutisioideaeCarduoideae. It might have evolved in southern South America some time during the early Palaeogene and subsequently entered Africa, before the biogeographical isolation of these continents became much more pronounced. The new fossil represents the first reliable point for calibration, favouring an earlier date to the split between Barnadesioideae and the rest of Asteraceae than previously thought, which can be traced back at least 47·5 million years. This is the oldest well dated member of Asteraceae and perhaps the earliest indirect evidence for bird pollination in the family.
Facultad de Ciencias Naturales y Museo - Materia
-
Ciencias Naturales
capitulescence
Compositae
Eocene
fossil taxon
Patagonia
Raiguenrayun cura gen. & sp. nov.
southern South America - 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:10915/84018
Ver los metadatos del registro completo
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An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implicationsBarreda, Viviana D.Palazzesi, LuisKatinas, LilianaCrisci, Jorge VíctorTellería, María CristinaBremer, KårePassala, Mauro G.Bechis, FlorenciaCorsolini, RodolfoCiencias NaturalescapitulescenceCompositaeEocenefossil taxonPatagoniaRaiguenrayun cura gen. & sp. nov.southern South AmericaBackground and Aims: Morphological, molecular and biogeographical information bearing on early evolution of the sunflower alliance of families suggests that the clade containing the extant daisy family (Asteraceae) differentiated in South America during the Eocene, although palaeontological studies on this continent failed to reveal conclusive support for this hypothesis. Here we describe in detail <i>Raiguenrayun cura</i> gen. & sp. nov., an exceptionally well preserved capitulescence of Asteraceae recovered from Eocene deposits of northwestern Patagonia, Argentina. Methods: The fossil was collected from the 47·5 million-year-old Huitrera Formation at the Estancia Don Hiplito locality, Ro Negro Province, Argentina. Key Results: The arrangement of the capitula in a cymose capitulescence, the many-flowered capitula with multiseriateimbricate involucral bracts and the pappus-like structures indicate a close morphological relationship with Asteraceae. <i>Raiguenrayun cura</i> and the associated pollen <i>Mutisiapollis telleriae</i> do not match exactly any living member of the family, and clearly represent extinct taxa. They share a mosaic of morphological features today recognized in taxa phylogenetically close to the root of Asteraceae, such as Stifftieae, Wunderlichioideae and Gochnatieae (Mutisioideae <i>sensu lato</i>) and Dicomeae and Oldenburgieae (Carduoideae), today endemic to or mainly distributed in South America and Africa, respectively. Conclusions: This is the first fossil genus of Asteraceae based on an outstandingly preserved capitulescence that might represent the ancestor of MutisioideaeCarduoideae. It might have evolved in southern South America some time during the early Palaeogene and subsequently entered Africa, before the biogeographical isolation of these continents became much more pronounced. The new fossil represents the first reliable point for calibration, favouring an earlier date to the split between Barnadesioideae and the rest of Asteraceae than previously thought, which can be traced back at least 47·5 million years. This is the oldest well dated member of Asteraceae and perhaps the earliest indirect evidence for bird pollination in the family.Facultad de Ciencias Naturales y Museo2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf127-134http://sedici.unlp.edu.ar/handle/10915/84018enginfo:eu-repo/semantics/altIdentifier/issn/0305-7364info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcr240info: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:UNLP2025-09-29T11:16:05Zoai:sedici.unlp.edu.ar:10915/84018Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:05.659SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications |
title |
An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications |
spellingShingle |
An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications Barreda, Viviana D. Ciencias Naturales capitulescence Compositae Eocene fossil taxon Patagonia Raiguenrayun cura gen. & sp. nov. southern South America |
title_short |
An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications |
title_full |
An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications |
title_fullStr |
An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications |
title_full_unstemmed |
An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications |
title_sort |
An extinct Eocene taxon of the daisy family (Asteraceae): Evolutionary, ecological and biogeographical implications |
dc.creator.none.fl_str_mv |
Barreda, Viviana D. Palazzesi, Luis Katinas, Liliana Crisci, Jorge Víctor Tellería, María Cristina Bremer, Kåre Passala, Mauro G. Bechis, Florencia Corsolini, Rodolfo |
author |
Barreda, Viviana D. |
author_facet |
Barreda, Viviana D. Palazzesi, Luis Katinas, Liliana Crisci, Jorge Víctor Tellería, María Cristina Bremer, Kåre Passala, Mauro G. Bechis, Florencia Corsolini, Rodolfo |
author_role |
author |
author2 |
Palazzesi, Luis Katinas, Liliana Crisci, Jorge Víctor Tellería, María Cristina Bremer, Kåre Passala, Mauro G. Bechis, Florencia Corsolini, Rodolfo |
author2_role |
author author author author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Naturales capitulescence Compositae Eocene fossil taxon Patagonia Raiguenrayun cura gen. & sp. nov. southern South America |
topic |
Ciencias Naturales capitulescence Compositae Eocene fossil taxon Patagonia Raiguenrayun cura gen. & sp. nov. southern South America |
dc.description.none.fl_txt_mv |
Background and Aims: Morphological, molecular and biogeographical information bearing on early evolution of the sunflower alliance of families suggests that the clade containing the extant daisy family (Asteraceae) differentiated in South America during the Eocene, although palaeontological studies on this continent failed to reveal conclusive support for this hypothesis. Here we describe in detail <i>Raiguenrayun cura</i> gen. & sp. nov., an exceptionally well preserved capitulescence of Asteraceae recovered from Eocene deposits of northwestern Patagonia, Argentina. Methods: The fossil was collected from the 47·5 million-year-old Huitrera Formation at the Estancia Don Hiplito locality, Ro Negro Province, Argentina. Key Results: The arrangement of the capitula in a cymose capitulescence, the many-flowered capitula with multiseriateimbricate involucral bracts and the pappus-like structures indicate a close morphological relationship with Asteraceae. <i>Raiguenrayun cura</i> and the associated pollen <i>Mutisiapollis telleriae</i> do not match exactly any living member of the family, and clearly represent extinct taxa. They share a mosaic of morphological features today recognized in taxa phylogenetically close to the root of Asteraceae, such as Stifftieae, Wunderlichioideae and Gochnatieae (Mutisioideae <i>sensu lato</i>) and Dicomeae and Oldenburgieae (Carduoideae), today endemic to or mainly distributed in South America and Africa, respectively. Conclusions: This is the first fossil genus of Asteraceae based on an outstandingly preserved capitulescence that might represent the ancestor of MutisioideaeCarduoideae. It might have evolved in southern South America some time during the early Palaeogene and subsequently entered Africa, before the biogeographical isolation of these continents became much more pronounced. The new fossil represents the first reliable point for calibration, favouring an earlier date to the split between Barnadesioideae and the rest of Asteraceae than previously thought, which can be traced back at least 47·5 million years. This is the oldest well dated member of Asteraceae and perhaps the earliest indirect evidence for bird pollination in the family. Facultad de Ciencias Naturales y Museo |
description |
Background and Aims: Morphological, molecular and biogeographical information bearing on early evolution of the sunflower alliance of families suggests that the clade containing the extant daisy family (Asteraceae) differentiated in South America during the Eocene, although palaeontological studies on this continent failed to reveal conclusive support for this hypothesis. Here we describe in detail <i>Raiguenrayun cura</i> gen. & sp. nov., an exceptionally well preserved capitulescence of Asteraceae recovered from Eocene deposits of northwestern Patagonia, Argentina. Methods: The fossil was collected from the 47·5 million-year-old Huitrera Formation at the Estancia Don Hiplito locality, Ro Negro Province, Argentina. Key Results: The arrangement of the capitula in a cymose capitulescence, the many-flowered capitula with multiseriateimbricate involucral bracts and the pappus-like structures indicate a close morphological relationship with Asteraceae. <i>Raiguenrayun cura</i> and the associated pollen <i>Mutisiapollis telleriae</i> do not match exactly any living member of the family, and clearly represent extinct taxa. They share a mosaic of morphological features today recognized in taxa phylogenetically close to the root of Asteraceae, such as Stifftieae, Wunderlichioideae and Gochnatieae (Mutisioideae <i>sensu lato</i>) and Dicomeae and Oldenburgieae (Carduoideae), today endemic to or mainly distributed in South America and Africa, respectively. Conclusions: This is the first fossil genus of Asteraceae based on an outstandingly preserved capitulescence that might represent the ancestor of MutisioideaeCarduoideae. It might have evolved in southern South America some time during the early Palaeogene and subsequently entered Africa, before the biogeographical isolation of these continents became much more pronounced. The new fossil represents the first reliable point for calibration, favouring an earlier date to the split between Barnadesioideae and the rest of Asteraceae than previously thought, which can be traced back at least 47·5 million years. This is the oldest well dated member of Asteraceae and perhaps the earliest indirect evidence for bird pollination in the family. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo 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://sedici.unlp.edu.ar/handle/10915/84018 |
url |
http://sedici.unlp.edu.ar/handle/10915/84018 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
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info:eu-repo/semantics/altIdentifier/issn/0305-7364 info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcr240 |
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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) |
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openAccess |
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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 127-134 |
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