New species of osmundaceous fertile leaves from the upper Triassic of Argentina

Autores
Coturel, Eliana Paula; Bodnar, Josefina; Morel, Eduardo Manuel; Ganuza, Daniel; Sagasti, Ana Julia; Beltrán, Marisol
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A new species of Osmundopsis Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. Osmundopsis zunigai sp. Nov. is characterized by having fertile pinnae with a slender striate rachis, bearing widely separate, opposite to subopposite short falcate pinnules with an entire margin, rounded apex, and a partially reduced lamina. The pinnules bear sporangia loosely disposed in clusters of four or five on the abaxial side. The sporangia are wedge-to heart-shaped, shortly stalked, with cells of the apical region thickened, and have a vertical dehiscence slit. The spores are trilete and laevigate. This is the first record of Osmundopsis in the Triassic of Argentina. The mutual occurrence or co-preservation of Osmundopsis zunigai sp. Nov. with sterile fronds of Cladophlebis kurtzi suggests the possibility that these species formed part of a dimorphic bipinnate frond. The diversity and geographic extent of fertile leaves of the Osmunda lineage in the early Late Triassic, with records in South Africa and Antarctica and now with this new taxon, support the idea of a moist mesothermal climatic belt in southern Gondwana.
Facultad de Ciencias Naturales y Museo
Materia
Paleontología
Ciencias Naturales
Carnian
Mendoza province
Osmundaceae
Osmundopsis
Potrerillos formation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/3.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/96805
Acceder
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling New species of osmundaceous fertile leaves from the upper Triassic of ArgentinaCoturel, Eliana PaulaBodnar, JosefinaMorel, Eduardo ManuelGanuza, DanielSagasti, Ana JuliaBeltrán, MarisolPaleontologíaCiencias NaturalesCarnianMendoza provinceOsmundaceaeOsmundopsisPotrerillos formationA new species of <i>Osmundopsis</i> Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. <i>Osmundopsis zunigai</i> sp. Nov. is characterized by having fertile pinnae with a slender striate rachis, bearing widely separate, opposite to subopposite short falcate pinnules with an entire margin, rounded apex, and a partially reduced lamina. The pinnules bear sporangia loosely disposed in clusters of four or five on the abaxial side. The sporangia are wedge-to heart-shaped, shortly stalked, with cells of the apical region thickened, and have a vertical dehiscence slit. The spores are trilete and laevigate. This is the first record of <i>Osmundopsis</i> in the Triassic of Argentina. The mutual occurrence or co-preservation of <i>Osmundopsis zunigai</i> sp. Nov. with sterile fronds of <i>Cladophlebis kurtzi</i> suggests the possibility that these species formed part of a dimorphic bipinnate frond. The diversity and geographic extent of fertile leaves of the <i>Osmunda</i> lineage in the early Late Triassic, with records in South Africa and Antarctica and now with this new taxon, support the idea of a moist mesothermal climatic belt in southern Gondwana.Facultad de Ciencias Naturales y Museo2018-12-24info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf107-119http://sedici.unlp.edu.ar/handle/10915/96805enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/82509info:eu-repo/semantics/altIdentifier/url/https://content.sciendo.com/view/journals/acpa/58/2/article-p107.xmlinfo:eu-repo/semantics/altIdentifier/issn/2082-0259info:eu-repo/semantics/altIdentifier/doi/10.2478/acpa-2018-0014info:eu-repo/semantics/altIdentifier/hdl/11336/82509info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/3.0/Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:20:26Zoai:sedici.unlp.edu.ar:10915/96805Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:27.148SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv New species of osmundaceous fertile leaves from the upper Triassic of Argentina
title New species of osmundaceous fertile leaves from the upper Triassic of Argentina
spellingShingle New species of osmundaceous fertile leaves from the upper Triassic of Argentina
Coturel, Eliana Paula
Paleontología
Ciencias Naturales
Carnian
Mendoza province
Osmundaceae
Osmundopsis
Potrerillos formation
title_short New species of osmundaceous fertile leaves from the upper Triassic of Argentina
title_full New species of osmundaceous fertile leaves from the upper Triassic of Argentina
title_fullStr New species of osmundaceous fertile leaves from the upper Triassic of Argentina
title_full_unstemmed New species of osmundaceous fertile leaves from the upper Triassic of Argentina
title_sort New species of osmundaceous fertile leaves from the upper Triassic of Argentina
dc.creator.none.fl_str_mv Coturel, Eliana Paula
Bodnar, Josefina
Morel, Eduardo Manuel
Ganuza, Daniel
Sagasti, Ana Julia
Beltrán, Marisol
author Coturel, Eliana Paula
author_facet Coturel, Eliana Paula
Bodnar, Josefina
Morel, Eduardo Manuel
Ganuza, Daniel
Sagasti, Ana Julia
Beltrán, Marisol
author_role author
author2 Bodnar, Josefina
Morel, Eduardo Manuel
Ganuza, Daniel
Sagasti, Ana Julia
Beltrán, Marisol
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Paleontología
Ciencias Naturales
Carnian
Mendoza province
Osmundaceae
Osmundopsis
Potrerillos formation
topic Paleontología
Ciencias Naturales
Carnian
Mendoza province
Osmundaceae
Osmundopsis
Potrerillos formation
dc.description.none.fl_txt_mv A new species of <i>Osmundopsis</i> Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. <i>Osmundopsis zunigai</i> sp. Nov. is characterized by having fertile pinnae with a slender striate rachis, bearing widely separate, opposite to subopposite short falcate pinnules with an entire margin, rounded apex, and a partially reduced lamina. The pinnules bear sporangia loosely disposed in clusters of four or five on the abaxial side. The sporangia are wedge-to heart-shaped, shortly stalked, with cells of the apical region thickened, and have a vertical dehiscence slit. The spores are trilete and laevigate. This is the first record of <i>Osmundopsis</i> in the Triassic of Argentina. The mutual occurrence or co-preservation of <i>Osmundopsis zunigai</i> sp. Nov. with sterile fronds of <i>Cladophlebis kurtzi</i> suggests the possibility that these species formed part of a dimorphic bipinnate frond. The diversity and geographic extent of fertile leaves of the <i>Osmunda</i> lineage in the early Late Triassic, with records in South Africa and Antarctica and now with this new taxon, support the idea of a moist mesothermal climatic belt in southern Gondwana.
Facultad de Ciencias Naturales y Museo
description A new species of <i>Osmundopsis</i> Harris is described based on several impression-compression fossils from the upper section of the Potrerillos Formation (Uspallata Group) at Cerro Cacheuta Hill, Mendoza Province, Argentina. <i>Osmundopsis zunigai</i> sp. Nov. is characterized by having fertile pinnae with a slender striate rachis, bearing widely separate, opposite to subopposite short falcate pinnules with an entire margin, rounded apex, and a partially reduced lamina. The pinnules bear sporangia loosely disposed in clusters of four or five on the abaxial side. The sporangia are wedge-to heart-shaped, shortly stalked, with cells of the apical region thickened, and have a vertical dehiscence slit. The spores are trilete and laevigate. This is the first record of <i>Osmundopsis</i> in the Triassic of Argentina. The mutual occurrence or co-preservation of <i>Osmundopsis zunigai</i> sp. Nov. with sterile fronds of <i>Cladophlebis kurtzi</i> suggests the possibility that these species formed part of a dimorphic bipinnate frond. The diversity and geographic extent of fertile leaves of the <i>Osmunda</i> lineage in the early Late Triassic, with records in South Africa and Antarctica and now with this new taxon, support the idea of a moist mesothermal climatic belt in southern Gondwana.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-24
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/10915/96805
url http://sedici.unlp.edu.ar/handle/10915/96805
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/82509
info:eu-repo/semantics/altIdentifier/url/https://content.sciendo.com/view/journals/acpa/58/2/article-p107.xml
info:eu-repo/semantics/altIdentifier/issn/2082-0259
info:eu-repo/semantics/altIdentifier/doi/10.2478/acpa-2018-0014
info:eu-repo/semantics/altIdentifier/hdl/11336/82509
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/3.0/
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/3.0/
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0)
dc.format.none.fl_str_mv application/pdf
107-119
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 13.070432

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