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
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/170002
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/170002
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
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 Técnicas2025-10-22T11:26:23Zoai: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:34982025-10-22 11:26:23.968CONICET 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
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv 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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score 12.982451

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