An unexpected finding: The earliest record of cycad-like foliage in Gondwana

Autores
Cariglino, Barbara; Martinez, Leandro Carlos Alcides; Rodriguez Ryzk, Gonzalo; Ruffo Rey, Lautaro Julián; Cardenas, Magali
Año de publicación
2024
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Cycads (= Cycadophyta) are dioecious gymnospermous palm-like trees that bear a crown of typically pinnate leaves. They represent the most ancient lineage among living spermatophytes and are distributed today in tropical to temperate areas worldwide. Despite the fossil record of the group extends back to the Permian, pre-Mesozoic fossil evidence is almost exclusively found in strata from the Northern Hemisphere. In contrast, the undisputed Paleozoic presence in Gondwana is—to date—based only on the description of an anatomically preserved axis from the Kungurian (Permian) Iratí Formation in Brazil. Here, we present the earliest—and to our knowledge, the only known—evidence of cycad-like foliage from the Paleozoic of Gondwana. The specimen was recovered from the Guadalupian-aged Laguna Polina Member of the La Golondrina Formation (Permian, Santa Cruz Province, Patagonia Argentina), and belong to the Museo Padre Molina in Río Gallegos (MPM-PB). It consists of a part and counterpart impression of a pinnately compound leaf, with its apex and base unknown. Leaflets start small at the base and gradually increase in size along the length of the frond. Leaflets are perpendicularly attached to the rachis by their whole bases. Rachis is thick (~2 mm wide) and striated. Leaflets are quadrangular, larger than wide (ranging 24.3–43 mm long and 9.6–12 mm wide) and imbricated along the rachis. The leaflet bases have a slightly decurrent basiscopic margin in some segments, whereas the apexes are truncate to barely rounded. Thick veins run parallel along the leaflets’ margins from the rachis to the apex, rarely exhibiting bifurcations. The preservation strongly points to the attachment of the leaflets above instead of laterally to the rachis, potentially indicating this cycad-like foliage as a new species attributable to Nilssonia. If confirmed, then this would represent the oldest evidence for the genus worldwide.
Fil: Cariglino, Barbara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Martinez, Leandro Carlos Alcides. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Rodriguez Ryzk, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Ruffo Rey, Lautaro Julián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Cardenas, Magali. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Reunión de Comunicaciones de la Asociación Paleontológica Argentina
San Rafael
Argentina
Asociación Paleontológica Argentina
Materia
CYCADALES
GONDWANA
LA GOLONDRINA
PERMIAN
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/273978
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling An unexpected finding: The earliest record of cycad-like foliage in GondwanaCariglino, BarbaraMartinez, Leandro Carlos AlcidesRodriguez Ryzk, GonzaloRuffo Rey, Lautaro JuliánCardenas, MagaliCYCADALESGONDWANALA GOLONDRINAPERMIANhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Cycads (= Cycadophyta) are dioecious gymnospermous palm-like trees that bear a crown of typically pinnate leaves. They represent the most ancient lineage among living spermatophytes and are distributed today in tropical to temperate areas worldwide. Despite the fossil record of the group extends back to the Permian, pre-Mesozoic fossil evidence is almost exclusively found in strata from the Northern Hemisphere. In contrast, the undisputed Paleozoic presence in Gondwana is—to date—based only on the description of an anatomically preserved axis from the Kungurian (Permian) Iratí Formation in Brazil. Here, we present the earliest—and to our knowledge, the only known—evidence of cycad-like foliage from the Paleozoic of Gondwana. The specimen was recovered from the Guadalupian-aged Laguna Polina Member of the La Golondrina Formation (Permian, Santa Cruz Province, Patagonia Argentina), and belong to the Museo Padre Molina in Río Gallegos (MPM-PB). It consists of a part and counterpart impression of a pinnately compound leaf, with its apex and base unknown. Leaflets start small at the base and gradually increase in size along the length of the frond. Leaflets are perpendicularly attached to the rachis by their whole bases. Rachis is thick (~2 mm wide) and striated. Leaflets are quadrangular, larger than wide (ranging 24.3–43 mm long and 9.6–12 mm wide) and imbricated along the rachis. The leaflet bases have a slightly decurrent basiscopic margin in some segments, whereas the apexes are truncate to barely rounded. Thick veins run parallel along the leaflets’ margins from the rachis to the apex, rarely exhibiting bifurcations. The preservation strongly points to the attachment of the leaflets above instead of laterally to the rachis, potentially indicating this cycad-like foliage as a new species attributable to Nilssonia. If confirmed, then this would represent the oldest evidence for the genus worldwide.Fil: Cariglino, Barbara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Martinez, Leandro Carlos Alcides. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Rodriguez Ryzk, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Ruffo Rey, Lautaro Julián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Cardenas, Magali. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaReunión de Comunicaciones de la Asociación Paleontológica ArgentinaSan RafaelArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2024info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/273978An unexpected finding: The earliest record of cycad-like foliage in Gondwana; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; San Rafael; Argentina; 2024; 53-532469-0228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://peapaleontologica.org.ar/index.php/peapa/article/view/544info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA/19.06.2025.544Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:40:03Zoai:ri.conicet.gov.ar:11336/273978instacron: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:34982025-11-12 09:40:04.138CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv An unexpected finding: The earliest record of cycad-like foliage in Gondwana
title An unexpected finding: The earliest record of cycad-like foliage in Gondwana
spellingShingle An unexpected finding: The earliest record of cycad-like foliage in Gondwana
Cariglino, Barbara
CYCADALES
GONDWANA
LA GOLONDRINA
PERMIAN
title_short An unexpected finding: The earliest record of cycad-like foliage in Gondwana
title_full An unexpected finding: The earliest record of cycad-like foliage in Gondwana
title_fullStr An unexpected finding: The earliest record of cycad-like foliage in Gondwana
title_full_unstemmed An unexpected finding: The earliest record of cycad-like foliage in Gondwana
title_sort An unexpected finding: The earliest record of cycad-like foliage in Gondwana
dc.creator.none.fl_str_mv Cariglino, Barbara
Martinez, Leandro Carlos Alcides
Rodriguez Ryzk, Gonzalo
Ruffo Rey, Lautaro Julián
Cardenas, Magali
author Cariglino, Barbara
author_facet Cariglino, Barbara
Martinez, Leandro Carlos Alcides
Rodriguez Ryzk, Gonzalo
Ruffo Rey, Lautaro Julián
Cardenas, Magali
author_role author
author2 Martinez, Leandro Carlos Alcides
Rodriguez Ryzk, Gonzalo
Ruffo Rey, Lautaro Julián
Cardenas, Magali
author2_role author
author
author
author
dc.subject.none.fl_str_mv CYCADALES
GONDWANA
LA GOLONDRINA
PERMIAN
topic CYCADALES
GONDWANA
LA GOLONDRINA
PERMIAN
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Cycads (= Cycadophyta) are dioecious gymnospermous palm-like trees that bear a crown of typically pinnate leaves. They represent the most ancient lineage among living spermatophytes and are distributed today in tropical to temperate areas worldwide. Despite the fossil record of the group extends back to the Permian, pre-Mesozoic fossil evidence is almost exclusively found in strata from the Northern Hemisphere. In contrast, the undisputed Paleozoic presence in Gondwana is—to date—based only on the description of an anatomically preserved axis from the Kungurian (Permian) Iratí Formation in Brazil. Here, we present the earliest—and to our knowledge, the only known—evidence of cycad-like foliage from the Paleozoic of Gondwana. The specimen was recovered from the Guadalupian-aged Laguna Polina Member of the La Golondrina Formation (Permian, Santa Cruz Province, Patagonia Argentina), and belong to the Museo Padre Molina in Río Gallegos (MPM-PB). It consists of a part and counterpart impression of a pinnately compound leaf, with its apex and base unknown. Leaflets start small at the base and gradually increase in size along the length of the frond. Leaflets are perpendicularly attached to the rachis by their whole bases. Rachis is thick (~2 mm wide) and striated. Leaflets are quadrangular, larger than wide (ranging 24.3–43 mm long and 9.6–12 mm wide) and imbricated along the rachis. The leaflet bases have a slightly decurrent basiscopic margin in some segments, whereas the apexes are truncate to barely rounded. Thick veins run parallel along the leaflets’ margins from the rachis to the apex, rarely exhibiting bifurcations. The preservation strongly points to the attachment of the leaflets above instead of laterally to the rachis, potentially indicating this cycad-like foliage as a new species attributable to Nilssonia. If confirmed, then this would represent the oldest evidence for the genus worldwide.
Fil: Cariglino, Barbara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Martinez, Leandro Carlos Alcides. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Rodriguez Ryzk, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Ruffo Rey, Lautaro Julián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Cardenas, Magali. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Reunión de Comunicaciones de la Asociación Paleontológica Argentina
San Rafael
Argentina
Asociación Paleontológica Argentina
description Cycads (= Cycadophyta) are dioecious gymnospermous palm-like trees that bear a crown of typically pinnate leaves. They represent the most ancient lineage among living spermatophytes and are distributed today in tropical to temperate areas worldwide. Despite the fossil record of the group extends back to the Permian, pre-Mesozoic fossil evidence is almost exclusively found in strata from the Northern Hemisphere. In contrast, the undisputed Paleozoic presence in Gondwana is—to date—based only on the description of an anatomically preserved axis from the Kungurian (Permian) Iratí Formation in Brazil. Here, we present the earliest—and to our knowledge, the only known—evidence of cycad-like foliage from the Paleozoic of Gondwana. The specimen was recovered from the Guadalupian-aged Laguna Polina Member of the La Golondrina Formation (Permian, Santa Cruz Province, Patagonia Argentina), and belong to the Museo Padre Molina in Río Gallegos (MPM-PB). It consists of a part and counterpart impression of a pinnately compound leaf, with its apex and base unknown. Leaflets start small at the base and gradually increase in size along the length of the frond. Leaflets are perpendicularly attached to the rachis by their whole bases. Rachis is thick (~2 mm wide) and striated. Leaflets are quadrangular, larger than wide (ranging 24.3–43 mm long and 9.6–12 mm wide) and imbricated along the rachis. The leaflet bases have a slightly decurrent basiscopic margin in some segments, whereas the apexes are truncate to barely rounded. Thick veins run parallel along the leaflets’ margins from the rachis to the apex, rarely exhibiting bifurcations. The preservation strongly points to the attachment of the leaflets above instead of laterally to the rachis, potentially indicating this cycad-like foliage as a new species attributable to Nilssonia. If confirmed, then this would represent the oldest evidence for the genus worldwide.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
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http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
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dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/273978
An unexpected finding: The earliest record of cycad-like foliage in Gondwana; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; San Rafael; Argentina; 2024; 53-53
2469-0228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/273978
identifier_str_mv An unexpected finding: The earliest record of cycad-like foliage in Gondwana; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; San Rafael; Argentina; 2024; 53-53
2469-0228
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA/19.06.2025.544
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dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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