Fossil pollen with affinity to Alismataceae, Palo Pintado formation, Miocene of Argentina.

This study describes fossil pollen with affinity to the Alismataceae family (Echinodorus, Helanthium and Sagittaria genera) from the Miocene Palo Pintado Formation in northwestern Argentina. Two species assigned to the genus Punctioratipollis (P. sp.1 and P. sp. 2) display morphological features lin...

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Autores principales: Mautino, René, Farrel, Ezequiel Eduardo, Palazzesi, Luis
Formato: Artículo revista
Lenguaje:Español
Publicado: Facultad de Ciencias Exactas y Naturales y Agrimensura 2025
Materias:
Polen fósil
Acceso en línea:https://revistas.unne.edu.ar/index.php/fce/article/view/8845
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Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-8845
record_format ojs
spelling I48-R154-article-88452025-12-19T20:12:50Z Fossil pollen with affinity to Alismataceae, Palo Pintado formation, Miocene of Argentina. Polen fósil con afinidad a Alismataceae, Formación Palo Pintado, Mioceno de Argentina Mautino, René Farrel, Ezequiel Eduardo Palazzesi, Luis Polen fósil This study describes fossil pollen with affinity to the Alismataceae family (Echinodorus, Helanthium and Sagittaria genera) from the Miocene Palo Pintado Formation in northwestern Argentina. Two species assigned to the genus Punctioratipollis (P. sp.1 and P. sp. 2) display morphological features linking them to Echinodorus and Sagittaria, representing the first palynological records of these taxa in the Neogene of Argentina. Their presence, alongside macrofossils previously attributed to Sagittaria, suggests the development of freshwater aquatic and/or marsh vegetation in floodplain settings with anastomosing river systems. Comparative analyses with extant species show notable similarities in aperture characteristics and exine ornamentation, thus supporting their assignment to Alismataceae. These findings strengthen the hypothesis of a South American origin for Echinodorus and Sagittaria, followed by dispersal events toward North America, consistent with molecular data and macrofossil evidence. Overall, this work enhances our understanding of the paleofloristic diversity in the Palo Pintado Formation and contributes to broader insights into the evolution of aquatic plant communities in southern latitudes during the Miocene. Se describen granos de polen fósil con afinidad a la familia Alismataceae (géneros Echinodorus, Helanthium y Sagittaria) provenientes de la Formación Palo Pintado (Mioceno) en el noroeste de Argentina. Dos especies asignadas al género Punctioratipollis (P. sp.1 y P. sp. 2) exhiben rasgos morfológicos que permiten vincularlas con dichos géneros, constituyendo los primeros registros palinológicos de estas plantas en el Neógeno de Argentina. Su presencia, junto con macrofósiles previamente atribuidos a Sagittaria, indica el desarrollo de vegetación acuática dulceacuícola y/o palustre en ambientes de planicie de inundación con sistemas de ríos anastomosados. Mediante comparaciones con especies actuales, se constatan similitudes en las características aperturales y en la ornamentación de la exina, lo que respalda su asignación a Alismataceae. Estos hallazgos refuerzan la hipótesis de un origen sudamericano para Echinodorus y Sagittaria, con posteriores eventos de dispersión hacia Norteamérica, en concordancia con datos moleculares y evidencias macrofósiles. El presente aporte enriquece el conocimiento paleoflorístico de la Formación Palo Pintado y contribuye a la comprensión de la evolución de comunidades acuáticas en latitudes australes durante el Mioceno. Facultad de Ciencias Exactas y Naturales y Agrimensura 2025-12-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unne.edu.ar/index.php/fce/article/view/8845 10.30972/fac.3528845 FACENA; Vol. 35 Núm. 2 (2025); 186-222 1851-507X 0325-4216 spa https://revistas.unne.edu.ar/index.php/fce/article/view/8845/8608 https://revistas.unne.edu.ar/index.php/fce/article/view/8845/8609 Derechos de autor 2025 René Mautino, Ezequiel Eduardo Farrel, Luis Palazzesi 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 Polen fósil
spellingShingle Polen fósil
Mautino, René
Farrel, Ezequiel Eduardo
Palazzesi, Luis
Fossil pollen with affinity to Alismataceae, Palo Pintado formation, Miocene of Argentina.
topic_facet Polen fósil
author Mautino, René
Farrel, Ezequiel Eduardo
Palazzesi, Luis
author_facet Mautino, René
Farrel, Ezequiel Eduardo
Palazzesi, Luis
author_sort Mautino, René
title Fossil pollen with affinity to Alismataceae, Palo Pintado formation, Miocene of Argentina.
title_short Fossil pollen with affinity to Alismataceae, Palo Pintado formation, Miocene of Argentina.
title_full Fossil pollen with affinity to Alismataceae, Palo Pintado formation, Miocene of Argentina.
title_fullStr Fossil pollen with affinity to Alismataceae, Palo Pintado formation, Miocene of Argentina.
title_full_unstemmed Fossil pollen with affinity to Alismataceae, Palo Pintado formation, Miocene of Argentina.
title_sort fossil pollen with affinity to alismataceae, palo pintado formation, miocene of argentina.
description This study describes fossil pollen with affinity to the Alismataceae family (Echinodorus, Helanthium and Sagittaria genera) from the Miocene Palo Pintado Formation in northwestern Argentina. Two species assigned to the genus Punctioratipollis (P. sp.1 and P. sp. 2) display morphological features linking them to Echinodorus and Sagittaria, representing the first palynological records of these taxa in the Neogene of Argentina. Their presence, alongside macrofossils previously attributed to Sagittaria, suggests the development of freshwater aquatic and/or marsh vegetation in floodplain settings with anastomosing river systems. Comparative analyses with extant species show notable similarities in aperture characteristics and exine ornamentation, thus supporting their assignment to Alismataceae. These findings strengthen the hypothesis of a South American origin for Echinodorus and Sagittaria, followed by dispersal events toward North America, consistent with molecular data and macrofossil evidence. Overall, this work enhances our understanding of the paleofloristic diversity in the Palo Pintado Formation and contributes to broader insights into the evolution of aquatic plant communities in southern latitudes during the Miocene.
publisher Facultad de Ciencias Exactas y Naturales y Agrimensura
publishDate 2025
url https://revistas.unne.edu.ar/index.php/fce/article/view/8845
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first_indexed 2026-01-17T05:00:37Z
last_indexed 2026-01-17T05:00:37Z
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