New Lower Cretaceous ferns (Polypodiopsida) from the Aptian Baqueró Group, Santa Cruz Province, Argentina

The Aptian Baqueró Group contains one of the most well-known Lower Cretaceous fossil floras of Patagonia, consisting of a rich assemblage of impression/compressions leaves, twigs, cones, wood silicifications and carbonizations, mesofossils and isolated palynomorphs. This assemblage represents most m...

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Autores principales: Vera, Ezequiel Ignacio, Perez Loinaze, Valeria S., Passalia, Mauro Gabriel, Llorens, Magdalena
Formato: Artículo revista
Lenguaje:Español
Publicado: Facultad de Ciencias Exactas y Naturales y Agrimensura 2025
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Acceso en línea:https://revistas.unne.edu.ar/index.php/fce/article/view/8826
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spelling I48-R154-article-88262025-12-10T13:38:29Z New Lower Cretaceous ferns (Polypodiopsida) from the Aptian Baqueró Group, Santa Cruz Province, Argentina Nuevos helechos (Polypodiopsida) del Cretácico Inferior del Grupo Baqueró (Aptiano), Provincia de Santa Cruz, Argentina Vera, Ezequiel Ignacio Perez Loinaze, Valeria S. Passalia, Mauro Gabriel Llorens, Magdalena Formación Anfiteatro de Ticó Matoniaceae Cyatheaceae Paramatonia Patagonia Anfiteatro de Ticó Formation Matoniaceae Cyatheaceae Paramatonia Patagonia The Aptian Baqueró Group contains one of the most well-known Lower Cretaceous fossil floras of Patagonia, consisting of a rich assemblage of impression/compressions leaves, twigs, cones, wood silicifications and carbonizations, mesofossils and isolated palynomorphs. This assemblage represents most major clades of plants, with ferns being the most diverse group, and the recovered angiosperms show some of the first steps in the evolution of the clade. The fossil flora of this unit has been the focus of continuous studies since 1960, and its abundance still allows for the discovery of paleontological novelties. In this contribution, three new fern taxa are reported from the lower unit of the Baqueró Group (i.e. Anfiteatro de Ticó Formation) based on impression/compressions of leaves. Paramatonia rafaherbstiana sp. nov. is a sterile fern morphologically comparable to Matonia and Phlebopteris, and represents the first putative Matoniaceae macrofossil from the unit. A second taxon, identified as Cyatheaceae indet., is a fertile fragmentary frond with pinnules bearing cup-shaped (cyatheoid) indusia. The third recognized taxon is referred to as Polypodiopsida indet., and is characterized by having small dentate pinnules bearing up to 10 sori on the abaxial side. These new taxa increase the specific fern diversity of the Baqueró Group. El Grupo Baqueró (Aptiano) contiene una de las floras fósiles mejor documentadas del Cretácico Inferior de Patagonia, la cual consiste de una asociación diversa de impresiones/compresiones de hojas, ramas, conos, madera silicificada y carbonizada, mesofósiles y palinomorfos aislados, representando la mayoría de los grandes clados de plantas. Entre estos, los helechos son el grupo más diverso, y las angiospermas recuperadas muestran algunos de los primeros pasos en la evolución del clado. La flora fósil de esta unidad ha sido objeto de estudios ininterrumpidos desde 1960, y su abundancia permite aún hoy el descubrimiento de novedades paleontológicas. En esta contribución, se reportan tres nuevos taxones de helechos para la unidad inferior del Grupo Baqueró (i.e., Formación Anfiteatro de Ticó) sobre la base de impresiones/compresiones de hojas. Paramatonia rafaherbstiana sp. nov. es un helecho estéril morfológicamente comparable a Matonia y Phlebopteris, y representa el primer posible macrofósil de Matoniaceae para la unidad. Un segundo taxón, identificado como Cyatheaceae indet., es un fragmento de fronde fertil, con pínnulas que portan indusios con forma de copa (cyatheoides). El tercer taxón reconocido es referido como Polypodiopsida indet., y se caracteriza por poseer pínnulas pequeñas dentadas portando hasta 10 soros en su cara abaxial. Estos nuevos taxones incrementan la diversidad de helechos para el Grupo Baqueró.   Facultad de Ciencias Exactas y Naturales y Agrimensura 2025-11-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unne.edu.ar/index.php/fce/article/view/8826 10.30972/fac.3528826 FACENA; Vol. 35 Núm. 2 (2025); 20-43 1851-507X 0325-4216 spa https://revistas.unne.edu.ar/index.php/fce/article/view/8826/8524 https://revistas.unne.edu.ar/index.php/fce/article/view/8826/8525 Derechos de autor 2025 Ezequiel Ignacio Vera, Valeria S. Perez Loinaze, Mauro Gabriel Passalia, Magdalena Llorens http://creativecommons.org/licenses/by-nc/4.0
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic Formación Anfiteatro de Ticó
Matoniaceae
Cyatheaceae
Paramatonia
Patagonia
Anfiteatro de Ticó Formation
Matoniaceae
Cyatheaceae
Paramatonia
Patagonia
spellingShingle Formación Anfiteatro de Ticó
Matoniaceae
Cyatheaceae
Paramatonia
Patagonia
Anfiteatro de Ticó Formation
Matoniaceae
Cyatheaceae
Paramatonia
Patagonia
Vera, Ezequiel Ignacio
Perez Loinaze, Valeria S.
Passalia, Mauro Gabriel
Llorens, Magdalena
New Lower Cretaceous ferns (Polypodiopsida) from the Aptian Baqueró Group, Santa Cruz Province, Argentina
topic_facet Formación Anfiteatro de Ticó
Matoniaceae
Cyatheaceae
Paramatonia
Patagonia
Anfiteatro de Ticó Formation
Matoniaceae
Cyatheaceae
Paramatonia
Patagonia
author Vera, Ezequiel Ignacio
Perez Loinaze, Valeria S.
Passalia, Mauro Gabriel
Llorens, Magdalena
author_facet Vera, Ezequiel Ignacio
Perez Loinaze, Valeria S.
Passalia, Mauro Gabriel
Llorens, Magdalena
author_sort Vera, Ezequiel Ignacio
title New Lower Cretaceous ferns (Polypodiopsida) from the Aptian Baqueró Group, Santa Cruz Province, Argentina
title_short New Lower Cretaceous ferns (Polypodiopsida) from the Aptian Baqueró Group, Santa Cruz Province, Argentina
title_full New Lower Cretaceous ferns (Polypodiopsida) from the Aptian Baqueró Group, Santa Cruz Province, Argentina
title_fullStr New Lower Cretaceous ferns (Polypodiopsida) from the Aptian Baqueró Group, Santa Cruz Province, Argentina
title_full_unstemmed New Lower Cretaceous ferns (Polypodiopsida) from the Aptian Baqueró Group, Santa Cruz Province, Argentina
title_sort new lower cretaceous ferns (polypodiopsida) from the aptian baqueró group, santa cruz province, argentina
description The Aptian Baqueró Group contains one of the most well-known Lower Cretaceous fossil floras of Patagonia, consisting of a rich assemblage of impression/compressions leaves, twigs, cones, wood silicifications and carbonizations, mesofossils and isolated palynomorphs. This assemblage represents most major clades of plants, with ferns being the most diverse group, and the recovered angiosperms show some of the first steps in the evolution of the clade. The fossil flora of this unit has been the focus of continuous studies since 1960, and its abundance still allows for the discovery of paleontological novelties. In this contribution, three new fern taxa are reported from the lower unit of the Baqueró Group (i.e. Anfiteatro de Ticó Formation) based on impression/compressions of leaves. Paramatonia rafaherbstiana sp. nov. is a sterile fern morphologically comparable to Matonia and Phlebopteris, and represents the first putative Matoniaceae macrofossil from the unit. A second taxon, identified as Cyatheaceae indet., is a fertile fragmentary frond with pinnules bearing cup-shaped (cyatheoid) indusia. The third recognized taxon is referred to as Polypodiopsida indet., and is characterized by having small dentate pinnules bearing up to 10 sori on the abaxial side. These new taxa increase the specific fern diversity of the Baqueró Group.
publisher Facultad de Ciencias Exactas y Naturales y Agrimensura
publishDate 2025
url https://revistas.unne.edu.ar/index.php/fce/article/view/8826
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first_indexed 2025-11-17T05:00:38Z
last_indexed 2025-12-17T05:00:22Z
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