Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)

Background and Aims: Early Palaeocene (Danian) plant fossils from Patagonia provide information on the recovery from the end-Cretaceous extinction and Cenozoic floristic change in South America. Actinomorphic flowers with eight to ten perianth parts are described and evaluated in a phylogenetic fram...

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Authors: Jud, Nathan A., Gandolfo, Maria Alejandra, Iglesias, Ari, Wilf, Peter
Format: article
Status:Published version
Publication Date:2018
Country:Argentina
Institution:Consejo Nacional de Investigaciones Científicas y Técnicas
Repository:CONICET Digital (CONICET)
Language:English
OAI Identifier:oai:ri.conicet.gov.ar:11336/91092
Online Access:http://hdl.handle.net/11336/91092
Access Level:Open access
Keyword:Danian
Early Paleogene
Patagonia
Gondwana
Schizomerieae
Argentina
Salamanca Formation
Peñas Coloradas Formation
K-Pg recovery
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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oai_identifier_str oai:ri.conicet.gov.ar:11336/91092
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
title Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
spellingShingle Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
Jud, Nathan A.
Danian
Early Paleogene
Patagonia
Gondwana
Schizomerieae
Argentina
Salamanca Formation
Peñas Coloradas Formation
K-Pg recovery
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
title_full Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
title_fullStr Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
title_full_unstemmed Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
title_sort Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)
dc.creator.none.fl_str_mv Jud, Nathan A.
Gandolfo, Maria Alejandra
Iglesias, Ari
Wilf, Peter
author Jud, Nathan A.
author_facet Jud, Nathan A.
Gandolfo, Maria Alejandra
Iglesias, Ari
Wilf, Peter
author_role author
author2 Gandolfo, Maria Alejandra
Iglesias, Ari
Wilf, Peter
author2_role author
author
author
dc.subject.none.fl_str_mv Danian
Early Paleogene
Patagonia
Gondwana
Schizomerieae
Argentina
Salamanca Formation
Peñas Coloradas Formation
K-Pg recovery
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic Danian
Early Paleogene
Patagonia
Gondwana
Schizomerieae
Argentina
Salamanca Formation
Peñas Coloradas Formation
K-Pg recovery
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description Background and Aims: Early Palaeocene (Danian) plant fossils from Patagonia provide information on the recovery from the end-Cretaceous extinction and Cenozoic floristic change in South America. Actinomorphic flowers with eight to ten perianth parts are described and evaluated in a phylogenetic framework. The goal of this study is to determine the identity of these fossil flowers and to discuss their evolutionary, palaeoecological and biogeographical significance. Methods: More than 100 fossilized flowers were collected from three localities in the Danian Salamanca and Peñas Coloradas Formations in southern Chubut. They were prepared, photographed and compared with similar extant and fossil flowers using published literature and herbarium specimens. Phylogenetic analysis was performed using morphological and molecular data. Key results: The fossil flowers share some but not all the synapomorphies that characterize the Schizomerieae, a tribe within Cunoniaceae. These features include the shallow floral cup, variable number of perianth parts arranged in two whorls, laciniate petals, anthers with a connective extension, and a superior ovary with free styles. The number of perianth parts is doubled and the in situ pollen is tricolporate, with a surface more like that of other Cunoniaceae outside Schizomerieae, such as Davidsonia or Weinmannia. Conclusions: An extinct genus of crown-group Cunoniaceae is recognized and placed along the stem lineage leading to Schizomerieae. Extant relatives are typical of tropical to southern-temperate rainforests, and these fossils likely indicate a similarly warm and wet temperate palaeoclimate. The oldest reliable occurrences of the family are fossil pollen and wood from the Upper Cretaceous of the Antarctica and Argentina, whereas in Australia the family first occurs in upper Palaeocene deposits. This discovery demonstrates that the family survived the Cretaceous-Palaeogene boundary event in Patagonia and that diversification of extant lineages in the family was under way by the earliest Cenozoic.
publishDate 2018
dc.date.none.fl_str_mv 2018-03-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/91092
Jud, Nathan A.; Gandolfo, Maria Alejandra; Iglesias, Ari; Wilf, Peter; Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae); NLM (Medline); Annals of botany; 121; 3; 4-3-2018; 431-442
1095-8290
CONICET Digital
CONICET
url http://hdl.handle.net/11336/91092
identifier_str_mv Jud, Nathan A.; Gandolfo, Maria Alejandra; Iglesias, Ari; Wilf, Peter; Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae); NLM (Medline); Annals of botany; 121; 3; 4-3-2018; 431-442
1095-8290
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcx173
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/aob/article/121/3/431/4788738
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.publisher.none.fl_str_mv NLM (Medline)
publisher.none.fl_str_mv NLM (Medline)
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1799195121965596672
spelling Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae)Jud, Nathan A.Gandolfo, Maria AlejandraIglesias, AriWilf, PeterDanianEarly PaleogenePatagoniaGondwanaSchizomerieaeArgentinaSalamanca FormationPeñas Coloradas FormationK-Pg recoveryhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Background and Aims: Early Palaeocene (Danian) plant fossils from Patagonia provide information on the recovery from the end-Cretaceous extinction and Cenozoic floristic change in South America. Actinomorphic flowers with eight to ten perianth parts are described and evaluated in a phylogenetic framework. The goal of this study is to determine the identity of these fossil flowers and to discuss their evolutionary, palaeoecological and biogeographical significance. Methods: More than 100 fossilized flowers were collected from three localities in the Danian Salamanca and Peñas Coloradas Formations in southern Chubut. They were prepared, photographed and compared with similar extant and fossil flowers using published literature and herbarium specimens. Phylogenetic analysis was performed using morphological and molecular data. Key results: The fossil flowers share some but not all the synapomorphies that characterize the Schizomerieae, a tribe within Cunoniaceae. These features include the shallow floral cup, variable number of perianth parts arranged in two whorls, laciniate petals, anthers with a connective extension, and a superior ovary with free styles. The number of perianth parts is doubled and the in situ pollen is tricolporate, with a surface more like that of other Cunoniaceae outside Schizomerieae, such as Davidsonia or Weinmannia. Conclusions: An extinct genus of crown-group Cunoniaceae is recognized and placed along the stem lineage leading to Schizomerieae. Extant relatives are typical of tropical to southern-temperate rainforests, and these fossils likely indicate a similarly warm and wet temperate palaeoclimate. The oldest reliable occurrences of the family are fossil pollen and wood from the Upper Cretaceous of the Antarctica and Argentina, whereas in Australia the family first occurs in upper Palaeocene deposits. This discovery demonstrates that the family survived the Cretaceous-Palaeogene boundary event in Patagonia and that diversification of extant lineages in the family was under way by the earliest Cenozoic.Fil: Jud, Nathan A.. Cornell University; Estados UnidosFil: Gandolfo, Maria Alejandra. Cornell University; Estados UnidosFil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Wilf, Peter. State University of Pennsylvania; Estados UnidosNLM (Medline)2018-03-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/91092Jud, Nathan A.; Gandolfo, Maria Alejandra; Iglesias, Ari; Wilf, Peter; Fossil flowers from the early Palaeocene of Patagonia, Argentina, with affinity to Schizomerieae (Cunoniaceae); NLM (Medline); Annals of botany; 121; 3; 4-3-2018; 431-4421095-8290CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcx173info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/aob/article/121/3/431/4788738info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:43:59Zoai:ri.conicet.gov.ar:11336/91092instacron: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:34982024-05-08 13:43:59.643CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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