Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina
- Autores
- de Benedetti, Facundo; Zamaloa, María del Carmen; Gandolfo, Maria Alejandra; Cúneo, Néstor Rubén
- Año de publicación
- 2020
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Premise: Undoubtedly, fossils are critical for understanding evolutionary transformations in deep time. Here, we reinvestigate the microspores and megaspores of Paleoazolla patagonica, a water fern found in Late Cretaceous sediments of the Chubut Province, Patagonia, Argentina, which provides novel evidence on the past history of the water fern clade. The study was based on recently collected specimens and additional observations of the original material. Methods: Most specimens analyzed herein were obtained from new palynological samples collected at the Cerro Bosta and Cañadón del Irupé localities, La Colonia Formation. Samples were mechanically disaggregated and treated with hydrofluoric and hydrochloric acid. Spores were studied using standard light microscopy and scanning electron microscopy. We also reexamined the original materials. Results: The newly described characters of Paleoazolla include the presence of heterosporangiate sori composed of one ellipsoidal megasporangium surrounded by three to four oval microsporangia, megasporangium containing one hairy massula that encloses two trilete megaspores (rarely one or three), and microsporangia containing numerous microspore massulae with non-septate multibarbed glochidia and one trilete microspore per massula. Conclusions: The reinterpretation has revealed a novel set of characters for understanding the evolution of heterosporous water ferns. The presence of two megaspores in the megasporangium of Paleoazolla exposes serious gaps in the current knowledge on the evolution of monomegaspory in heterosporous water ferns, a fact that emphasizes the need of including fossils within phylogenies to elucidate patterns of character acquisition among water ferns.
Fil: de Benedetti, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Zamaloa, María del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Gandolfo, Maria Alejandra. Cornell University; Estados Unidos
Fil: Cúneo, Néstor Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina - Materia
-
HETEROSPORY
LATE COLONIA FORMATION
MAASTRICHTIAN
MEGASPORE
MICROSPORE MASSULAE
SALVINIACEAE - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/170002
Ver los metadatos del registro completo
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spelling |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentinade Benedetti, FacundoZamaloa, María del CarmenGandolfo, Maria AlejandraCúneo, Néstor RubénHETEROSPORYLATE COLONIA FORMATIONMAASTRICHTIANMEGASPOREMICROSPORE MASSULAESALVINIACEAEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Premise: Undoubtedly, fossils are critical for understanding evolutionary transformations in deep time. Here, we reinvestigate the microspores and megaspores of Paleoazolla patagonica, a water fern found in Late Cretaceous sediments of the Chubut Province, Patagonia, Argentina, which provides novel evidence on the past history of the water fern clade. The study was based on recently collected specimens and additional observations of the original material. Methods: Most specimens analyzed herein were obtained from new palynological samples collected at the Cerro Bosta and Cañadón del Irupé localities, La Colonia Formation. Samples were mechanically disaggregated and treated with hydrofluoric and hydrochloric acid. Spores were studied using standard light microscopy and scanning electron microscopy. We also reexamined the original materials. Results: The newly described characters of Paleoazolla include the presence of heterosporangiate sori composed of one ellipsoidal megasporangium surrounded by three to four oval microsporangia, megasporangium containing one hairy massula that encloses two trilete megaspores (rarely one or three), and microsporangia containing numerous microspore massulae with non-septate multibarbed glochidia and one trilete microspore per massula. Conclusions: The reinterpretation has revealed a novel set of characters for understanding the evolution of heterosporous water ferns. The presence of two megaspores in the megasporangium of Paleoazolla exposes serious gaps in the current knowledge on the evolution of monomegaspory in heterosporous water ferns, a fact that emphasizes the need of including fossils within phylogenies to elucidate patterns of character acquisition among water ferns.Fil: de Benedetti, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Zamaloa, María del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Gandolfo, Maria Alejandra. Cornell University; Estados UnidosFil: Cúneo, Néstor Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; ArgentinaWiley Blackwell Publishing, Inc2020-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/170002de Benedetti, Facundo; Zamaloa, María del Carmen; Gandolfo, Maria Alejandra; Cúneo, Néstor Rubén; Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; American Journal of Botany; 107; 7; 7-2020; 1054-10710002-91221537-2197CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/ajb2.1501info:eu-repo/semantics/altIdentifier/url/https://bsapubs.onlinelibrary.wiley.com/doi/10.1002/ajb2.1501info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:57:10Zoai:ri.conicet.gov.ar:11336/170002instacron: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:34982025-09-29 09:57:10.57CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina |
title |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina |
spellingShingle |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina de Benedetti, Facundo HETEROSPORY LATE COLONIA FORMATION MAASTRICHTIAN MEGASPORE MICROSPORE MASSULAE SALVINIACEAE |
title_short |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina |
title_full |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina |
title_fullStr |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina |
title_full_unstemmed |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina |
title_sort |
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina |
dc.creator.none.fl_str_mv |
de Benedetti, Facundo Zamaloa, María del Carmen Gandolfo, Maria Alejandra Cúneo, Néstor Rubén |
author |
de Benedetti, Facundo |
author_facet |
de Benedetti, Facundo Zamaloa, María del Carmen Gandolfo, Maria Alejandra Cúneo, Néstor Rubén |
author_role |
author |
author2 |
Zamaloa, María del Carmen Gandolfo, Maria Alejandra Cúneo, Néstor Rubén |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
HETEROSPORY LATE COLONIA FORMATION MAASTRICHTIAN MEGASPORE MICROSPORE MASSULAE SALVINIACEAE |
topic |
HETEROSPORY LATE COLONIA FORMATION MAASTRICHTIAN MEGASPORE MICROSPORE MASSULAE SALVINIACEAE |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Premise: Undoubtedly, fossils are critical for understanding evolutionary transformations in deep time. Here, we reinvestigate the microspores and megaspores of Paleoazolla patagonica, a water fern found in Late Cretaceous sediments of the Chubut Province, Patagonia, Argentina, which provides novel evidence on the past history of the water fern clade. The study was based on recently collected specimens and additional observations of the original material. Methods: Most specimens analyzed herein were obtained from new palynological samples collected at the Cerro Bosta and Cañadón del Irupé localities, La Colonia Formation. Samples were mechanically disaggregated and treated with hydrofluoric and hydrochloric acid. Spores were studied using standard light microscopy and scanning electron microscopy. We also reexamined the original materials. Results: The newly described characters of Paleoazolla include the presence of heterosporangiate sori composed of one ellipsoidal megasporangium surrounded by three to four oval microsporangia, megasporangium containing one hairy massula that encloses two trilete megaspores (rarely one or three), and microsporangia containing numerous microspore massulae with non-septate multibarbed glochidia and one trilete microspore per massula. Conclusions: The reinterpretation has revealed a novel set of characters for understanding the evolution of heterosporous water ferns. The presence of two megaspores in the megasporangium of Paleoazolla exposes serious gaps in the current knowledge on the evolution of monomegaspory in heterosporous water ferns, a fact that emphasizes the need of including fossils within phylogenies to elucidate patterns of character acquisition among water ferns. Fil: de Benedetti, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina Fil: Zamaloa, María del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina Fil: Gandolfo, Maria Alejandra. Cornell University; Estados Unidos Fil: Cúneo, Néstor Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina |
description |
Premise: Undoubtedly, fossils are critical for understanding evolutionary transformations in deep time. Here, we reinvestigate the microspores and megaspores of Paleoazolla patagonica, a water fern found in Late Cretaceous sediments of the Chubut Province, Patagonia, Argentina, which provides novel evidence on the past history of the water fern clade. The study was based on recently collected specimens and additional observations of the original material. Methods: Most specimens analyzed herein were obtained from new palynological samples collected at the Cerro Bosta and Cañadón del Irupé localities, La Colonia Formation. Samples were mechanically disaggregated and treated with hydrofluoric and hydrochloric acid. Spores were studied using standard light microscopy and scanning electron microscopy. We also reexamined the original materials. Results: The newly described characters of Paleoazolla include the presence of heterosporangiate sori composed of one ellipsoidal megasporangium surrounded by three to four oval microsporangia, megasporangium containing one hairy massula that encloses two trilete megaspores (rarely one or three), and microsporangia containing numerous microspore massulae with non-septate multibarbed glochidia and one trilete microspore per massula. Conclusions: The reinterpretation has revealed a novel set of characters for understanding the evolution of heterosporous water ferns. The presence of two megaspores in the megasporangium of Paleoazolla exposes serious gaps in the current knowledge on the evolution of monomegaspory in heterosporous water ferns, a fact that emphasizes the need of including fossils within phylogenies to elucidate patterns of character acquisition among water ferns. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-07 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 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://hdl.handle.net/11336/170002 de Benedetti, Facundo; Zamaloa, María del Carmen; Gandolfo, Maria Alejandra; Cúneo, Néstor Rubén; Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; American Journal of Botany; 107; 7; 7-2020; 1054-1071 0002-9122 1537-2197 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/170002 |
identifier_str_mv |
de Benedetti, Facundo; Zamaloa, María del Carmen; Gandolfo, Maria Alejandra; Cúneo, Néstor Rubén; Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; American Journal of Botany; 107; 7; 7-2020; 1054-1071 0002-9122 1537-2197 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ajb2.1501 info:eu-repo/semantics/altIdentifier/url/https://bsapubs.onlinelibrary.wiley.com/doi/10.1002/ajb2.1501 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Wiley Blackwell Publishing, Inc |
publisher.none.fl_str_mv |
Wiley Blackwell Publishing, Inc |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613711537373184 |
score |
13.070432 |