Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications

Rhus asymmetrica sp. nov. from the lower Oligocene of Cervera (Catalonia, Spain) is characterized by a trifoliate leaf with a symmetric sessile apical leaflet and asymmetric lateral leaflets. The apical leaflet displays a serrate margin and decurrent base with pinnate primary venation, craspedodromo...

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Autores: Tosal Alcobé, Aixa, Sanjuan i Girbau, Josep, Martín-Closas, Carles
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/219142
Acceso en línea:https://hdl.handle.net/2445/219142
Access Level:acceso abierto
Palabra clave:Paleoclimatologia
Oligocè
Paleobotànica
Plantes fòssils
Paleoecologia
Paleoclimatology
Oligocene
Paleobotany
Fossil plants
Paleoecology
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spelling Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implicationsTosal Alcobé, AixaSanjuan i Girbau, JosepMartín-Closas, CarlesPaleoclimatologiaOligocèPaleobotànicaPlantes fòssilsPaleoecologiaPaleoclimatologyOligocenePaleobotanyFossil plantsPaleoecologyRhus asymmetrica sp. nov. from the lower Oligocene of Cervera (Catalonia, Spain) is characterized by a trifoliate leaf with a symmetric sessile apical leaflet and asymmetric lateral leaflets. The apical leaflet displays a serrate margin and decurrent base with pinnate primary venation, craspedodromous secondary venation and an irregular reticulate tertiary framework. The lateral leaflets showa rounded basewith a secondary basal vein in the distal part of the lamina, while the proximal part is straight or concave. Formerly, these specimens were accommodated within Rhus pyrrhae Unger. However, detailed study of the R. pyrrhae holotype has led us to emend its diagnosis to include its brochidodromous secondary venation pattern, which differs clearly from the venation pattern of the new species. Additionally, a number of leaf morphotypes from the Cervera palaeobotanical site that were erroneously attributed to Rhus by former authors have been segregated and related to Acer and Toxicodendron. The extant species R. aromatica displays the closest foliar structure to R. asymmetrica sp. nov.However, differences in the leafmorphology suggest that the newspecies grewunder distinct palaeoclimatic conditions: (1) R. asymmetrica sp. nov. bears glands at the tips of the teeth of the lateral leaflets while R. aromatica is devoid of these glands. This character would help to prevent excessive evapotranspiration; (2) lateral leaflets of R. asymmetrica sp. nov. are asymmetric while in R. aromatica they are symmetric, suggesting that R. asymmetrica sp. nov. grew under a greater environmental stress than R. aromatica; (3) R. asymmetrica sp. nov. displays fewer teeth with a larger tooth-area than R. aromatica. This would indicate growth under a warm climate with low seasonal contrast. These features are compatible with an open woodland habitat under subtropical palaeoclimatic conditions.Elsevier B.V.2025202520192025info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion51 p.application/pdfhttps://hdl.handle.net/2445/219142Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.revpalbo.2018.11.011Review of Palaeobotany and Palynology, 2019, vol. 261, p. 67-80(c) Elsevier B.V., 2019info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2191422026-05-29T05:05:01Z
dc.title.none.fl_str_mv Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications
title Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications
spellingShingle Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications
Tosal Alcobé, Aixa
Paleoclimatologia
Oligocè
Paleobotànica
Plantes fòssils
Paleoecologia
Paleoclimatology
Oligocene
Paleobotany
Fossil plants
Paleoecology
title_short Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications
title_full Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications
title_fullStr Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications
title_full_unstemmed Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications
title_sort Foliar adaptations of Rhus asymmetrica sp. nov. from the Oligocene of Cervera (Catalonia, Spain). Palaeoclimatic implications
dc.creator.none.fl_str_mv Tosal Alcobé, Aixa
Sanjuan i Girbau, Josep
Martín-Closas, Carles
author Tosal Alcobé, Aixa
author_facet Tosal Alcobé, Aixa
Sanjuan i Girbau, Josep
Martín-Closas, Carles
author_role author
author2 Sanjuan i Girbau, Josep
Martín-Closas, Carles
author2_role author
author
dc.subject.none.fl_str_mv Paleoclimatologia
Oligocè
Paleobotànica
Plantes fòssils
Paleoecologia
Paleoclimatology
Oligocene
Paleobotany
Fossil plants
Paleoecology
topic Paleoclimatologia
Oligocè
Paleobotànica
Plantes fòssils
Paleoecologia
Paleoclimatology
Oligocene
Paleobotany
Fossil plants
Paleoecology
description Rhus asymmetrica sp. nov. from the lower Oligocene of Cervera (Catalonia, Spain) is characterized by a trifoliate leaf with a symmetric sessile apical leaflet and asymmetric lateral leaflets. The apical leaflet displays a serrate margin and decurrent base with pinnate primary venation, craspedodromous secondary venation and an irregular reticulate tertiary framework. The lateral leaflets showa rounded basewith a secondary basal vein in the distal part of the lamina, while the proximal part is straight or concave. Formerly, these specimens were accommodated within Rhus pyrrhae Unger. However, detailed study of the R. pyrrhae holotype has led us to emend its diagnosis to include its brochidodromous secondary venation pattern, which differs clearly from the venation pattern of the new species. Additionally, a number of leaf morphotypes from the Cervera palaeobotanical site that were erroneously attributed to Rhus by former authors have been segregated and related to Acer and Toxicodendron. The extant species R. aromatica displays the closest foliar structure to R. asymmetrica sp. nov.However, differences in the leafmorphology suggest that the newspecies grewunder distinct palaeoclimatic conditions: (1) R. asymmetrica sp. nov. bears glands at the tips of the teeth of the lateral leaflets while R. aromatica is devoid of these glands. This character would help to prevent excessive evapotranspiration; (2) lateral leaflets of R. asymmetrica sp. nov. are asymmetric while in R. aromatica they are symmetric, suggesting that R. asymmetrica sp. nov. grew under a greater environmental stress than R. aromatica; (3) R. asymmetrica sp. nov. displays fewer teeth with a larger tooth-area than R. aromatica. This would indicate growth under a warm climate with low seasonal contrast. These features are compatible with an open woodland habitat under subtropical palaeoclimatic conditions.
publishDate 2019
dc.date.none.fl_str_mv 2019
2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/219142
url https://hdl.handle.net/2445/219142
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.revpalbo.2018.11.011
Review of Palaeobotany and Palynology, 2019, vol. 261, p. 67-80
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2019
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2019
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 51 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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