A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas

Autores
Agnolin, Federico; Chimento, Nicolás Roberto
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Gigantism in terrestrial tortoises occurred frequently and convergently in different lineages of Testudinidae. Despite the fact that giant forms were geographically and stratigraphically widespread in South America, Pleistocene members are still very poorly known, most of them represented by fragmentary and unassociated materials. The aim of the present contribution is to describe Chelonoidis pucara n. sp., a new species coming from Upper Pleistocene beds of northern Buenos Aires province, Argentina. The new species is known by the anterior half of a plastron having a unique combination of apomorphic and plesiomorphic features. It is very large-sized (estimated carapace length about 1.7-1.8 meters), rendering it as the largest testudinid from South America, and placing it among the “supergigantic” tortoise phenotype. Like other supergigantic tortoises (which were up to now exclusively known in the Old World), the new species shows enlarged epiplastral projections, probably related to competition with other males. The ecological role of these “supergigantic” tortoises is also briefly discussed.
Fil: Agnolin, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Fundación de Historia Natural Félix de Azara; Argentina
Fil: Chimento, Nicolás Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Materia
Testudinidae
Chelonoidis
Gigantism
Buenos Aires
Lujanian Stage
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/291572
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A giant among giants: A new land tortoise from the Pleistocene of the Argentine PampasAgnolin, FedericoChimento, Nicolás RobertoTestudinidaeChelonoidisGigantismBuenos AiresLujanian Stagehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Gigantism in terrestrial tortoises occurred frequently and convergently in different lineages of Testudinidae. Despite the fact that giant forms were geographically and stratigraphically widespread in South America, Pleistocene members are still very poorly known, most of them represented by fragmentary and unassociated materials. The aim of the present contribution is to describe Chelonoidis pucara n. sp., a new species coming from Upper Pleistocene beds of northern Buenos Aires province, Argentina. The new species is known by the anterior half of a plastron having a unique combination of apomorphic and plesiomorphic features. It is very large-sized (estimated carapace length about 1.7-1.8 meters), rendering it as the largest testudinid from South America, and placing it among the “supergigantic” tortoise phenotype. Like other supergigantic tortoises (which were up to now exclusively known in the Old World), the new species shows enlarged epiplastral projections, probably related to competition with other males. The ecological role of these “supergigantic” tortoises is also briefly discussed.Fil: Agnolin, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Fundación de Historia Natural Félix de Azara; ArgentinaFil: Chimento, Nicolás Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaUniversità degli Studi di Milano2025-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/291572Agnolin, Federico; Chimento, Nicolás Roberto; A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas; Università degli Studi di Milano; Rivista Italiana di Paleontologia e Stratigrafia; 131; 2; 4-2025; 241-2590035-6883CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://riviste.unimi.it/index.php/RIPS/article/view/27229info:eu-repo/semantics/altIdentifier/doi/10.54103/2039-4942/27229info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T15:31:45Zoai:ri.conicet.gov.ar:11336/291572instacron: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:34982026-08-25 15:31:45.701CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas
title A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas
spellingShingle A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas
Agnolin, Federico
Testudinidae
Chelonoidis
Gigantism
Buenos Aires
Lujanian Stage
title_short A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas
title_full A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas
title_fullStr A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas
title_full_unstemmed A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas
title_sort A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas
dc.creator.none.fl_str_mv Agnolin, Federico
Chimento, Nicolás Roberto
author Agnolin, Federico
author_facet Agnolin, Federico
Chimento, Nicolás Roberto
author_role author
author2 Chimento, Nicolás Roberto
author2_role author
dc.subject.none.fl_str_mv Testudinidae
Chelonoidis
Gigantism
Buenos Aires
Lujanian Stage
topic Testudinidae
Chelonoidis
Gigantism
Buenos Aires
Lujanian Stage
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Gigantism in terrestrial tortoises occurred frequently and convergently in different lineages of Testudinidae. Despite the fact that giant forms were geographically and stratigraphically widespread in South America, Pleistocene members are still very poorly known, most of them represented by fragmentary and unassociated materials. The aim of the present contribution is to describe Chelonoidis pucara n. sp., a new species coming from Upper Pleistocene beds of northern Buenos Aires province, Argentina. The new species is known by the anterior half of a plastron having a unique combination of apomorphic and plesiomorphic features. It is very large-sized (estimated carapace length about 1.7-1.8 meters), rendering it as the largest testudinid from South America, and placing it among the “supergigantic” tortoise phenotype. Like other supergigantic tortoises (which were up to now exclusively known in the Old World), the new species shows enlarged epiplastral projections, probably related to competition with other males. The ecological role of these “supergigantic” tortoises is also briefly discussed.
Fil: Agnolin, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Fundación de Historia Natural Félix de Azara; Argentina
Fil: Chimento, Nicolás Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
description Gigantism in terrestrial tortoises occurred frequently and convergently in different lineages of Testudinidae. Despite the fact that giant forms were geographically and stratigraphically widespread in South America, Pleistocene members are still very poorly known, most of them represented by fragmentary and unassociated materials. The aim of the present contribution is to describe Chelonoidis pucara n. sp., a new species coming from Upper Pleistocene beds of northern Buenos Aires province, Argentina. The new species is known by the anterior half of a plastron having a unique combination of apomorphic and plesiomorphic features. It is very large-sized (estimated carapace length about 1.7-1.8 meters), rendering it as the largest testudinid from South America, and placing it among the “supergigantic” tortoise phenotype. Like other supergigantic tortoises (which were up to now exclusively known in the Old World), the new species shows enlarged epiplastral projections, probably related to competition with other males. The ecological role of these “supergigantic” tortoises is also briefly discussed.
publishDate 2025
dc.date.none.fl_str_mv 2025-04
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/11336/291572
Agnolin, Federico; Chimento, Nicolás Roberto; A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas; Università degli Studi di Milano; Rivista Italiana di Paleontologia e Stratigrafia; 131; 2; 4-2025; 241-259
0035-6883
CONICET Digital
CONICET
url http://hdl.handle.net/11336/291572
identifier_str_mv Agnolin, Federico; Chimento, Nicolás Roberto; A giant among giants: A new land tortoise from the Pleistocene of the Argentine Pampas; Università degli Studi di Milano; Rivista Italiana di Paleontologia e Stratigrafia; 131; 2; 4-2025; 241-259
0035-6883
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://riviste.unimi.it/index.php/RIPS/article/view/27229
info:eu-repo/semantics/altIdentifier/doi/10.54103/2039-4942/27229
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Università degli Studi di Milano
publisher.none.fl_str_mv Università degli Studi di Milano
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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