A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies

Autores
Escapa, Ignacio Hernán; Cúneo, Rubén; Axsmith, Brian
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A new conifer, Austrohamia minuta, gen. et sp. nov., from the Jurassic of Chubut province, Argentina, is described and proposed as the type species of a new genus of the Cupressaceae s.l. The material consists of impressions represented by well-preserved leafy twigs and branches as well as ovulate and pollen cones. The ovulate cones show a simple organization with helically arranged bracts, each bearing one or two inverted ovules on their adaxial surfaces. Pollen cones occur in terminal clusters subtended by modified leaves. This conifer possesses a combination of characters indicating placement within the basal Cupressaceae (i.e. the former “Taxodiaceae”). This conclusion is supported by a phylogenetic analysis that places the Argentinean fossil close to the extant genera Athrotaxis and Cunninghamia, and the fossil genera Elatides and Sewardio- dendron. In this context some classical characters in conifer systematics are reconsidered in order to clarify their homologies and significance in the early evolution of the Cupressaceae. This represents the first convincing record of the Cupressaceae s.l. in Jurassic oras from the southern hemisphere.
Fil: Escapa, Ignacio Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Cúneo, Rubén. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Axsmith, Brian. University of South Alabama; Estados Unidos
Materia
Conifer
Cupressaceae s. l.
Jurassic
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/248332
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/248332
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologiesEscapa, Ignacio HernánCúneo, RubénAxsmith, BrianConiferCupressaceae s. l.Jurassichttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A new conifer, Austrohamia minuta, gen. et sp. nov., from the Jurassic of Chubut province, Argentina, is described and proposed as the type species of a new genus of the Cupressaceae s.l. The material consists of impressions represented by well-preserved leafy twigs and branches as well as ovulate and pollen cones. The ovulate cones show a simple organization with helically arranged bracts, each bearing one or two inverted ovules on their adaxial surfaces. Pollen cones occur in terminal clusters subtended by modified leaves. This conifer possesses a combination of characters indicating placement within the basal Cupressaceae (i.e. the former “Taxodiaceae”). This conclusion is supported by a phylogenetic analysis that places the Argentinean fossil close to the extant genera Athrotaxis and Cunninghamia, and the fossil genera Elatides and Sewardio- dendron. In this context some classical characters in conifer systematics are reconsidered in order to clarify their homologies and significance in the early evolution of the Cupressaceae. This represents the first convincing record of the Cupressaceae s.l. in Jurassic oras from the southern hemisphere.Fil: Escapa, Ignacio Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Cúneo, Rubén. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Axsmith, Brian. University of South Alabama; Estados UnidosElsevier Science2008-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/248332Escapa, Ignacio Hernán; Cúneo, Rubén; Axsmith, Brian; A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies; Elsevier Science; Review of Palaeobotany and Palynology; 151; 3-4; 9-2008; 110-1220034-6667CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0034666708000481info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2008.03.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:09:18Zoai:ri.conicet.gov.ar:11336/248332instacron: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:34982025-09-29 10:09:18.48CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
title A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
spellingShingle A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
Escapa, Ignacio Hernán
Conifer
Cupressaceae s. l.
Jurassic
title_short A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
title_full A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
title_fullStr A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
title_full_unstemmed A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
title_sort A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies
dc.creator.none.fl_str_mv Escapa, Ignacio Hernán
Cúneo, Rubén
Axsmith, Brian
author Escapa, Ignacio Hernán
author_facet Escapa, Ignacio Hernán
Cúneo, Rubén
Axsmith, Brian
author_role author
author2 Cúneo, Rubén
Axsmith, Brian
author2_role author
author
dc.subject.none.fl_str_mv Conifer
Cupressaceae s. l.
Jurassic
topic Conifer
Cupressaceae s. l.
Jurassic
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A new conifer, Austrohamia minuta, gen. et sp. nov., from the Jurassic of Chubut province, Argentina, is described and proposed as the type species of a new genus of the Cupressaceae s.l. The material consists of impressions represented by well-preserved leafy twigs and branches as well as ovulate and pollen cones. The ovulate cones show a simple organization with helically arranged bracts, each bearing one or two inverted ovules on their adaxial surfaces. Pollen cones occur in terminal clusters subtended by modified leaves. This conifer possesses a combination of characters indicating placement within the basal Cupressaceae (i.e. the former “Taxodiaceae”). This conclusion is supported by a phylogenetic analysis that places the Argentinean fossil close to the extant genera Athrotaxis and Cunninghamia, and the fossil genera Elatides and Sewardio- dendron. In this context some classical characters in conifer systematics are reconsidered in order to clarify their homologies and significance in the early evolution of the Cupressaceae. This represents the first convincing record of the Cupressaceae s.l. in Jurassic oras from the southern hemisphere.
Fil: Escapa, Ignacio Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Cúneo, Rubén. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Axsmith, Brian. University of South Alabama; Estados Unidos
description A new conifer, Austrohamia minuta, gen. et sp. nov., from the Jurassic of Chubut province, Argentina, is described and proposed as the type species of a new genus of the Cupressaceae s.l. The material consists of impressions represented by well-preserved leafy twigs and branches as well as ovulate and pollen cones. The ovulate cones show a simple organization with helically arranged bracts, each bearing one or two inverted ovules on their adaxial surfaces. Pollen cones occur in terminal clusters subtended by modified leaves. This conifer possesses a combination of characters indicating placement within the basal Cupressaceae (i.e. the former “Taxodiaceae”). This conclusion is supported by a phylogenetic analysis that places the Argentinean fossil close to the extant genera Athrotaxis and Cunninghamia, and the fossil genera Elatides and Sewardio- dendron. In this context some classical characters in conifer systematics are reconsidered in order to clarify their homologies and significance in the early evolution of the Cupressaceae. This represents the first convincing record of the Cupressaceae s.l. in Jurassic oras from the southern hemisphere.
publishDate 2008
dc.date.none.fl_str_mv 2008-09
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/11336/248332
Escapa, Ignacio Hernán; Cúneo, Rubén; Axsmith, Brian; A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies; Elsevier Science; Review of Palaeobotany and Palynology; 151; 3-4; 9-2008; 110-122
0034-6667
CONICET Digital
CONICET
url http://hdl.handle.net/11336/248332
identifier_str_mv Escapa, Ignacio Hernán; Cúneo, Rubén; Axsmith, Brian; A new genus of the Cupressaceae (sensu lato) from the Jurassic of Patagonia: Implications for conifer megasporangiate cone homologies; Elsevier Science; Review of Palaeobotany and Palynology; 151; 3-4; 9-2008; 110-122
0034-6667
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0034666708000481
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2008.03.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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
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score 13.070432

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