Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina

Autores
Artabe, Analía Emilia Eva; Zamuner, Alba Berta
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Anatomically preserved stems of Late Triassic corystosperms from the Ríó Blanco Formation of Argentina are described and assigned to Elchaxylon zavattieriae gen. et sp. nov. The polyxylic gymnospermous axes have two discontinuous cambial rings, which develop centrifugal secondary xylem and centripetal secondary xylem around the mesarch primary xylem bundles. The centrifugal undivided pycnoxylic secondary xylem incorporates uniseriate rays, uni- to biseriate radial pitting either alternate or opposite, and one or two simple pits in each cross-field. Atypical secondary growth is restricted to localized development of centripetal secondary xylem (inverted xylem). Elchaxylon could represent a basal member of the rhexoxyloid lineage. This basal clade is characterized by limited centripetal secondary xylem, lack of perimedullar bundles, and modest development of centrifugal xylem.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Argentina
Late Triassic
Río Blanco Formation
Corystospermaceae
fossil wood
Elchaxylon
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/194738
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/194738
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of ArgentinaArtabe, Analía Emilia EvaZamuner, Alba BertaCiencias NaturalesArgentinaLate TriassicRío Blanco FormationCorystospermaceaefossil woodElchaxylonAnatomically preserved stems of Late Triassic corystosperms from the Ríó Blanco Formation of Argentina are described and assigned to Elchaxylon zavattieriae gen. et sp. nov. The polyxylic gymnospermous axes have two discontinuous cambial rings, which develop centrifugal secondary xylem and centripetal secondary xylem around the mesarch primary xylem bundles. The centrifugal undivided pycnoxylic secondary xylem incorporates uniseriate rays, uni- to biseriate radial pitting either alternate or opposite, and one or two simple pits in each cross-field. Atypical secondary growth is restricted to localized development of centripetal secondary xylem (inverted xylem). Elchaxylon could represent a basal member of the rhexoxyloid lineage. This basal clade is characterized by limited centripetal secondary xylem, lack of perimedullar bundles, and modest development of centrifugal xylem.Facultad de Ciencias Naturales y Museo2007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf85-96http://sedici.unlp.edu.ar/handle/10915/194738enginfo:eu-repo/semantics/altIdentifier/issn/1752-0754info:eu-repo/semantics/altIdentifier/doi/10.1080/03115510601123643info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2026-05-27T11:48:08Zoai:sedici.unlp.edu.ar:10915/194738Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292026-05-27 11:48:08.87SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina
title Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina
spellingShingle Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina
Artabe, Analía Emilia Eva
Ciencias Naturales
Argentina
Late Triassic
Río Blanco Formation
Corystospermaceae
fossil wood
Elchaxylon
title_short Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina
title_full Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina
title_fullStr Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina
title_full_unstemmed Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina
title_sort Elchaxylon, a new corystosperm based on permineralized stems from the Late Triassic of Argentina
dc.creator.none.fl_str_mv Artabe, Analía Emilia Eva
Zamuner, Alba Berta
author Artabe, Analía Emilia Eva
author_facet Artabe, Analía Emilia Eva
Zamuner, Alba Berta
author_role author
author2 Zamuner, Alba Berta
author2_role author
dc.subject.none.fl_str_mv Ciencias Naturales
Argentina
Late Triassic
Río Blanco Formation
Corystospermaceae
fossil wood
Elchaxylon
topic Ciencias Naturales
Argentina
Late Triassic
Río Blanco Formation
Corystospermaceae
fossil wood
Elchaxylon
dc.description.none.fl_txt_mv Anatomically preserved stems of Late Triassic corystosperms from the Ríó Blanco Formation of Argentina are described and assigned to Elchaxylon zavattieriae gen. et sp. nov. The polyxylic gymnospermous axes have two discontinuous cambial rings, which develop centrifugal secondary xylem and centripetal secondary xylem around the mesarch primary xylem bundles. The centrifugal undivided pycnoxylic secondary xylem incorporates uniseriate rays, uni- to biseriate radial pitting either alternate or opposite, and one or two simple pits in each cross-field. Atypical secondary growth is restricted to localized development of centripetal secondary xylem (inverted xylem). Elchaxylon could represent a basal member of the rhexoxyloid lineage. This basal clade is characterized by limited centripetal secondary xylem, lack of perimedullar bundles, and modest development of centrifugal xylem.
Facultad de Ciencias Naturales y Museo
description Anatomically preserved stems of Late Triassic corystosperms from the Ríó Blanco Formation of Argentina are described and assigned to Elchaxylon zavattieriae gen. et sp. nov. The polyxylic gymnospermous axes have two discontinuous cambial rings, which develop centrifugal secondary xylem and centripetal secondary xylem around the mesarch primary xylem bundles. The centrifugal undivided pycnoxylic secondary xylem incorporates uniseriate rays, uni- to biseriate radial pitting either alternate or opposite, and one or two simple pits in each cross-field. Atypical secondary growth is restricted to localized development of centripetal secondary xylem (inverted xylem). Elchaxylon could represent a basal member of the rhexoxyloid lineage. This basal clade is characterized by limited centripetal secondary xylem, lack of perimedullar bundles, and modest development of centrifugal xylem.
publishDate 2007
dc.date.none.fl_str_mv 2007
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/10915/194738
url http://sedici.unlp.edu.ar/handle/10915/194738
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1752-0754
info:eu-repo/semantics/altIdentifier/doi/10.1080/03115510601123643
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.format.none.fl_str_mv application/pdf
85-96
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.343132

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