A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales

Autores
Martinez, Leandro Carlos Alcides; Artabe, Analia Emilia Eva; Bodnar, Josefina
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The cycads are an ancient group of seed plants. Fossil stems assigned to the Cycadales are, however, rare and few descriptions of them exist. Here, a new genus of cycad stem, Wintucycas gen. nov., is described on the basis of specimens found in the Allen Formation (Upper Cretaceous) at the Salitral Ojo de Agua locality, Río Negro Province, Argentina. The most remarkable features of Wintucyas are: a columnar stem with persistent leaf bases, absence of cataphylls, a wide pith, medullary vascular bundles, mucilage canals and idioblasts; a polyxylic vascular cylinder; inverted xylem; and manoxylic wood. The new genus was included in a phylogenetic analysis and its relationships with fossil and extant genera of Cycadales were examined. In the resulting phylogenetic hypothesis, Wintucycas is circumscribed to subfamily Encephalartoideae, supporting the existence of a greater diversity of this group in South America during the Cretaceous.
Fil: Martinez, Leandro Carlos Alcides. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Fil: Artabe, Analia Emilia Eva. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bodnar, Josefina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Allen Formation
Anatomy
NeuquÉN Basin
Patagonia
Phylogeny
South America
Systematics
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:11336/68014
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other CycadalesMartinez, Leandro Carlos AlcidesArtabe, Analia Emilia EvaBodnar, JosefinaAllen FormationAnatomyNeuquÉN BasinPatagoniaPhylogenySouth AmericaSystematicshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The cycads are an ancient group of seed plants. Fossil stems assigned to the Cycadales are, however, rare and few descriptions of them exist. Here, a new genus of cycad stem, Wintucycas gen. nov., is described on the basis of specimens found in the Allen Formation (Upper Cretaceous) at the Salitral Ojo de Agua locality, Río Negro Province, Argentina. The most remarkable features of Wintucyas are: a columnar stem with persistent leaf bases, absence of cataphylls, a wide pith, medullary vascular bundles, mucilage canals and idioblasts; a polyxylic vascular cylinder; inverted xylem; and manoxylic wood. The new genus was included in a phylogenetic analysis and its relationships with fossil and extant genera of Cycadales were examined. In the resulting phylogenetic hypothesis, Wintucycas is circumscribed to subfamily Encephalartoideae, supporting the existence of a greater diversity of this group in South America during the Cretaceous.Fil: Martinez, Leandro Carlos Alcides. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Artabe, Analia Emilia Eva. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bodnar, Josefina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaOxford University Press2012-11info: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/11336/68014Martinez, Leandro Carlos Alcides; Artabe, Analia Emilia Eva; Bodnar, Josefina; A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales; Oxford University Press; Botanical Journal of The Linnean Society; 170; 3; 11-2012; 436-4580024-4074CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1095-8339.2012.01300.xinfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/botlinnean/article/170/3/436/2416273info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:06:28Zoai:ri.conicet.gov.ar:11336/68014instacron: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:34982025-10-15 15:06:28.349CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales
title A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales
spellingShingle A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales
Martinez, Leandro Carlos Alcides
Allen Formation
Anatomy
NeuquÉN Basin
Patagonia
Phylogeny
South America
Systematics
title_short A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales
title_full A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales
title_fullStr A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales
title_full_unstemmed A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales
title_sort A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales
dc.creator.none.fl_str_mv Martinez, Leandro Carlos Alcides
Artabe, Analia Emilia Eva
Bodnar, Josefina
author Martinez, Leandro Carlos Alcides
author_facet Martinez, Leandro Carlos Alcides
Artabe, Analia Emilia Eva
Bodnar, Josefina
author_role author
author2 Artabe, Analia Emilia Eva
Bodnar, Josefina
author2_role author
author
dc.subject.none.fl_str_mv Allen Formation
Anatomy
NeuquÉN Basin
Patagonia
Phylogeny
South America
Systematics
topic Allen Formation
Anatomy
NeuquÉN Basin
Patagonia
Phylogeny
South America
Systematics
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The cycads are an ancient group of seed plants. Fossil stems assigned to the Cycadales are, however, rare and few descriptions of them exist. Here, a new genus of cycad stem, Wintucycas gen. nov., is described on the basis of specimens found in the Allen Formation (Upper Cretaceous) at the Salitral Ojo de Agua locality, Río Negro Province, Argentina. The most remarkable features of Wintucyas are: a columnar stem with persistent leaf bases, absence of cataphylls, a wide pith, medullary vascular bundles, mucilage canals and idioblasts; a polyxylic vascular cylinder; inverted xylem; and manoxylic wood. The new genus was included in a phylogenetic analysis and its relationships with fossil and extant genera of Cycadales were examined. In the resulting phylogenetic hypothesis, Wintucycas is circumscribed to subfamily Encephalartoideae, supporting the existence of a greater diversity of this group in South America during the Cretaceous.
Fil: Martinez, Leandro Carlos Alcides. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Fil: Artabe, Analia Emilia Eva. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bodnar, Josefina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The cycads are an ancient group of seed plants. Fossil stems assigned to the Cycadales are, however, rare and few descriptions of them exist. Here, a new genus of cycad stem, Wintucycas gen. nov., is described on the basis of specimens found in the Allen Formation (Upper Cretaceous) at the Salitral Ojo de Agua locality, Río Negro Province, Argentina. The most remarkable features of Wintucyas are: a columnar stem with persistent leaf bases, absence of cataphylls, a wide pith, medullary vascular bundles, mucilage canals and idioblasts; a polyxylic vascular cylinder; inverted xylem; and manoxylic wood. The new genus was included in a phylogenetic analysis and its relationships with fossil and extant genera of Cycadales were examined. In the resulting phylogenetic hypothesis, Wintucycas is circumscribed to subfamily Encephalartoideae, supporting the existence of a greater diversity of this group in South America during the Cretaceous.
publishDate 2012
dc.date.none.fl_str_mv 2012-11
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/11336/68014
Martinez, Leandro Carlos Alcides; Artabe, Analia Emilia Eva; Bodnar, Josefina; A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales; Oxford University Press; Botanical Journal of The Linnean Society; 170; 3; 11-2012; 436-458
0024-4074
CONICET Digital
CONICET
url http://hdl.handle.net/11336/68014
identifier_str_mv Martinez, Leandro Carlos Alcides; Artabe, Analia Emilia Eva; Bodnar, Josefina; A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales; Oxford University Press; Botanical Journal of The Linnean Society; 170; 3; 11-2012; 436-458
0024-4074
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1095-8339.2012.01300.x
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/botlinnean/article/170/3/436/2416273
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 Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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 13.221938

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