Reconstruction and phylogenetic significance of a new Equisetum linnaeus species from the Lower Jurassic of Cerro Bayo (Chubut Province, Argentina)

We describe Equisetum dimorphum sp. nov. from the Lower Jurassic of Chubut Province, Patagonia, Argentina. This new species is based on fertile and vegetative remains preserved as impressions of stems, leaves, strobili, transversal sections of the stems showing their anatomy, and terminal pagoda-lik...

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Autores principales: Elgorriaga, A., Escapa, I.H., Bomfleur, B., Cúneo, R., Ottone, E.G.
Formato: JOUR
Materias:
Equisetales
Equisetum
Jurassic
Patagonia
Systematic
matrix
morphology
phylogenetics
reconstruction
vascular plant
Aisen
Argentina
Cerro Bayo
Chile
Chubut
Equisetites
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00027014_v52_n1_p135_Elgorriaga
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00027014_v52_n1_p135_Elgorriaga
record_format dspace
spelling todo:paper_00027014_v52_n1_p135_Elgorriaga2023-10-03T13:53:17Z Reconstruction and phylogenetic significance of a new Equisetum linnaeus species from the Lower Jurassic of Cerro Bayo (Chubut Province, Argentina) Elgorriaga, A. Escapa, I.H. Bomfleur, B. Cúneo, R. Ottone, E.G. Equisetales Equisetum Jurassic Patagonia Systematic Jurassic matrix morphology phylogenetics reconstruction vascular plant Aisen Argentina Cerro Bayo Chile Chubut Patagonia Equisetales Equisetites Equisetum We describe Equisetum dimorphum sp. nov. from the Lower Jurassic of Chubut Province, Patagonia, Argentina. This new species is based on fertile and vegetative remains preserved as impressions of stems, leaves, strobili, transversal sections of the stems showing their anatomy, and terminal pagoda-like structures. The fine-grained sedimentary matrix also preserved detailed impressions of epidermal features. The morphological characters allow a whole-plant reconstruction and assignment to Equisetum. Equisetum dimorphum sp. nov. shows a mosaic of morphological characters that are commonly present in other Mesozoic forms and representatives of the two extant Equisetum subgenera, e.g., sunken stomata and a blunt strobilus apex. Compared to other well-known Mesozoic equisetalean taxa, Equisetum dimorphum sp. nov. appears to be most closely related to a group of Jurassic Equisetum-like plants including Equisetum laterale Phillips and Equisetites ferganensis Seward. Additional evidence for the morphological stasis of the fertile and vegetative organs of extant horsetails is supplied with this new material, adding further support to the hypothesis that the extant horsetails are a successful group that has undergone only little morphological changeover time and that has been present, nearly worldwide, since Jurassic times. Fil:Cúneo, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ottone, E.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v52_n1_p135_Elgorriaga
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Equisetales
Equisetum
Jurassic
Patagonia
Systematic
Jurassic
matrix
morphology
phylogenetics
reconstruction
vascular plant
Aisen
Argentina
Cerro Bayo
Chile
Chubut
Patagonia
Equisetales
Equisetites
Equisetum
spellingShingle Equisetales
Equisetum
Jurassic
Patagonia
Systematic
Jurassic
matrix
morphology
phylogenetics
reconstruction
vascular plant
Aisen
Argentina
Cerro Bayo
Chile
Chubut
Patagonia
Equisetales
Equisetites
Equisetum
Elgorriaga, A.
Escapa, I.H.
Bomfleur, B.
Cúneo, R.
Ottone, E.G.
Reconstruction and phylogenetic significance of a new Equisetum linnaeus species from the Lower Jurassic of Cerro Bayo (Chubut Province, Argentina)
topic_facet Equisetales
Equisetum
Jurassic
Patagonia
Systematic
Jurassic
matrix
morphology
phylogenetics
reconstruction
vascular plant
Aisen
Argentina
Cerro Bayo
Chile
Chubut
Patagonia
Equisetales
Equisetites
Equisetum
description We describe Equisetum dimorphum sp. nov. from the Lower Jurassic of Chubut Province, Patagonia, Argentina. This new species is based on fertile and vegetative remains preserved as impressions of stems, leaves, strobili, transversal sections of the stems showing their anatomy, and terminal pagoda-like structures. The fine-grained sedimentary matrix also preserved detailed impressions of epidermal features. The morphological characters allow a whole-plant reconstruction and assignment to Equisetum. Equisetum dimorphum sp. nov. shows a mosaic of morphological characters that are commonly present in other Mesozoic forms and representatives of the two extant Equisetum subgenera, e.g., sunken stomata and a blunt strobilus apex. Compared to other well-known Mesozoic equisetalean taxa, Equisetum dimorphum sp. nov. appears to be most closely related to a group of Jurassic Equisetum-like plants including Equisetum laterale Phillips and Equisetites ferganensis Seward. Additional evidence for the morphological stasis of the fertile and vegetative organs of extant horsetails is supplied with this new material, adding further support to the hypothesis that the extant horsetails are a successful group that has undergone only little morphological changeover time and that has been present, nearly worldwide, since Jurassic times.
format JOUR
author Elgorriaga, A.
Escapa, I.H.
Bomfleur, B.
Cúneo, R.
Ottone, E.G.
author_facet Elgorriaga, A.
Escapa, I.H.
Bomfleur, B.
Cúneo, R.
Ottone, E.G.
author_sort Elgorriaga, A.
title Reconstruction and phylogenetic significance of a new Equisetum linnaeus species from the Lower Jurassic of Cerro Bayo (Chubut Province, Argentina)
title_short Reconstruction and phylogenetic significance of a new Equisetum linnaeus species from the Lower Jurassic of Cerro Bayo (Chubut Province, Argentina)
title_full Reconstruction and phylogenetic significance of a new Equisetum linnaeus species from the Lower Jurassic of Cerro Bayo (Chubut Province, Argentina)
title_fullStr Reconstruction and phylogenetic significance of a new Equisetum linnaeus species from the Lower Jurassic of Cerro Bayo (Chubut Province, Argentina)
title_full_unstemmed Reconstruction and phylogenetic significance of a new Equisetum linnaeus species from the Lower Jurassic of Cerro Bayo (Chubut Province, Argentina)
title_sort reconstruction and phylogenetic significance of a new equisetum linnaeus species from the lower jurassic of cerro bayo (chubut province, argentina)
url http://hdl.handle.net/20.500.12110/paper_00027014_v52_n1_p135_Elgorriaga
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