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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84018

id SEDICI_b68830b2e3e980f5a959f428b55f3469
oai_identifier_str oai:sedici.unlp.edu.ar:10915/84018
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling 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
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/84018
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dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0305-7364
info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcr240
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
127-134
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