Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western fl...

Autores
de la Fuente, Marcelo Saul; Maniel, Ignacio Jorge; Bogado Diniz, Joaquin Pedro; González Ruiz, Pablo; Galli, Claudia Inés
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We reassess the taxonomy of the problematic taxon “Podocnemis” argentinensis from the Maíz Gordo Formation (late Paleocene) at Quebrada Queñoal (type locality), Departamento de Humahuaca, Jujuy province, Argentina. This plastron-based species was initially named as a member of the genus Podocnemis (Podocnemididae) based on the holotype and one referred specimen. Considering the dubious generic assignment of the holotype of “Podocnemis” argentinensis, we performed a thorough revision of the morphological characters of this taxon, based on the holotype and previously undescribed specimens from the same lithostratigraphic unit in the Casa Grande-Vizcarra river area (western flank of the Mal Paso Range, Tres Cruces Sub-basin) in Jujuy province, Argentina. The new referred specimens include a collection of shells found in association with one skull from Quebrada del Agujero, as well as some shells from Quebrada del Puesto in the same region. Comparison between the extended hypodigm of “Podocnemis” argentinensis and other podocnemidids suggests the assignment of this species to a new generic entity, based on the presence of a short preorbital skull portion with steeply curved prefrontal bones, both exoccipital bones with a dorso-medial process restricting the dorsal part of the foramen magnum to a narrow cleft, lateral orbits, absence of an interorbital groove, high maxillae, a large vomer and the generalized gular, extragular and humeral scute pattern. We included this species in a phylogenetic analysis to assess its relationships with other pelomedusoid turtles. It is recovered as the sister taxon of Gestemys powelli, with which it shares the following four synapomorphies: foramen posterius canalis carotici interni outside the basisphenoid, long basioccipital, reduced nuchal embayment and dorsoventral flattening of the shell. The clade including “Podocnemis” argentinensis and Gestemys constitutes a Paleogene Argentinean lineage which is more closely related to Erymnochelyinae and Peltocephalinae than to Podocnemidinae, a position supported by a more covered adductor fossa and a large anterior opening of the cavum pterygoidei.
Fil: de la Fuente, Marcelo Saul. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentina
Fil: Maniel, Ignacio Jorge. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentina
Fil: Bogado Diniz, Joaquin Pedro. Universidade Federal de Viçosa; Brasil
Fil: González Ruiz, Pablo. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentina
Fil: Galli, Claudia Inés. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentina
Materia
Podocnemididae
Systematics
Paleogene
Northwestern Argentina
Nivel de accesibilidad
acceso abierto
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https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
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Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/290667
Acceder
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spelling Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentinade la Fuente, Marcelo SaulManiel, Ignacio JorgeBogado Diniz, Joaquin PedroGonzález Ruiz, PabloGalli, Claudia InésPodocnemididaeSystematicsPaleogeneNorthwestern Argentinahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We reassess the taxonomy of the problematic taxon “Podocnemis” argentinensis from the Maíz Gordo Formation (late Paleocene) at Quebrada Queñoal (type locality), Departamento de Humahuaca, Jujuy province, Argentina. This plastron-based species was initially named as a member of the genus Podocnemis (Podocnemididae) based on the holotype and one referred specimen. Considering the dubious generic assignment of the holotype of “Podocnemis” argentinensis, we performed a thorough revision of the morphological characters of this taxon, based on the holotype and previously undescribed specimens from the same lithostratigraphic unit in the Casa Grande-Vizcarra river area (western flank of the Mal Paso Range, Tres Cruces Sub-basin) in Jujuy province, Argentina. The new referred specimens include a collection of shells found in association with one skull from Quebrada del Agujero, as well as some shells from Quebrada del Puesto in the same region. Comparison between the extended hypodigm of “Podocnemis” argentinensis and other podocnemidids suggests the assignment of this species to a new generic entity, based on the presence of a short preorbital skull portion with steeply curved prefrontal bones, both exoccipital bones with a dorso-medial process restricting the dorsal part of the foramen magnum to a narrow cleft, lateral orbits, absence of an interorbital groove, high maxillae, a large vomer and the generalized gular, extragular and humeral scute pattern. We included this species in a phylogenetic analysis to assess its relationships with other pelomedusoid turtles. It is recovered as the sister taxon of Gestemys powelli, with which it shares the following four synapomorphies: foramen posterius canalis carotici interni outside the basisphenoid, long basioccipital, reduced nuchal embayment and dorsoventral flattening of the shell. The clade including “Podocnemis” argentinensis and Gestemys constitutes a Paleogene Argentinean lineage which is more closely related to Erymnochelyinae and Peltocephalinae than to Podocnemidinae, a position supported by a more covered adductor fossa and a large anterior opening of the cavum pterygoidei.Fil: de la Fuente, Marcelo Saul. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; ArgentinaFil: Maniel, Ignacio Jorge. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; ArgentinaFil: Bogado Diniz, Joaquin Pedro. Universidade Federal de Viçosa; BrasilFil: González Ruiz, Pablo. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; ArgentinaFil: Galli, Claudia Inés. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; ArgentinaBirkhauser Verlag Ag2025-09-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/290667de la Fuente, Marcelo Saul; Maniel, Ignacio Jorge; Bogado Diniz, Joaquin Pedro; González Ruiz, Pablo; Galli, Claudia Inés; Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina; Birkhauser Verlag Ag; Swiss Journal of Palaeontology; 144; 1; 25-9-2025; 1-371664-2384CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1186/s13358-025-00390-5info:eu-repo/semantics/altIdentifier/doi/10.1186/s13358-025-00390-5info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T14:53:49Zoai:ri.conicet.gov.ar:11336/290667instacron: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 14:53:49.788CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina
title Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina
spellingShingle Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina
de la Fuente, Marcelo Saul
Podocnemididae
Systematics
Paleogene
Northwestern Argentina
title_short Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina
title_full Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina
title_fullStr Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina
title_full_unstemmed Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina
title_sort Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina
dc.creator.none.fl_str_mv de la Fuente, Marcelo Saul
Maniel, Ignacio Jorge
Bogado Diniz, Joaquin Pedro
González Ruiz, Pablo
Galli, Claudia Inés
author de la Fuente, Marcelo Saul
author_facet de la Fuente, Marcelo Saul
Maniel, Ignacio Jorge
Bogado Diniz, Joaquin Pedro
González Ruiz, Pablo
Galli, Claudia Inés
author_role author
author2 Maniel, Ignacio Jorge
Bogado Diniz, Joaquin Pedro
González Ruiz, Pablo
Galli, Claudia Inés
author2_role author
author
author
author
dc.subject.none.fl_str_mv Podocnemididae
Systematics
Paleogene
Northwestern Argentina
topic Podocnemididae
Systematics
Paleogene
Northwestern Argentina
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We reassess the taxonomy of the problematic taxon “Podocnemis” argentinensis from the Maíz Gordo Formation (late Paleocene) at Quebrada Queñoal (type locality), Departamento de Humahuaca, Jujuy province, Argentina. This plastron-based species was initially named as a member of the genus Podocnemis (Podocnemididae) based on the holotype and one referred specimen. Considering the dubious generic assignment of the holotype of “Podocnemis” argentinensis, we performed a thorough revision of the morphological characters of this taxon, based on the holotype and previously undescribed specimens from the same lithostratigraphic unit in the Casa Grande-Vizcarra river area (western flank of the Mal Paso Range, Tres Cruces Sub-basin) in Jujuy province, Argentina. The new referred specimens include a collection of shells found in association with one skull from Quebrada del Agujero, as well as some shells from Quebrada del Puesto in the same region. Comparison between the extended hypodigm of “Podocnemis” argentinensis and other podocnemidids suggests the assignment of this species to a new generic entity, based on the presence of a short preorbital skull portion with steeply curved prefrontal bones, both exoccipital bones with a dorso-medial process restricting the dorsal part of the foramen magnum to a narrow cleft, lateral orbits, absence of an interorbital groove, high maxillae, a large vomer and the generalized gular, extragular and humeral scute pattern. We included this species in a phylogenetic analysis to assess its relationships with other pelomedusoid turtles. It is recovered as the sister taxon of Gestemys powelli, with which it shares the following four synapomorphies: foramen posterius canalis carotici interni outside the basisphenoid, long basioccipital, reduced nuchal embayment and dorsoventral flattening of the shell. The clade including “Podocnemis” argentinensis and Gestemys constitutes a Paleogene Argentinean lineage which is more closely related to Erymnochelyinae and Peltocephalinae than to Podocnemidinae, a position supported by a more covered adductor fossa and a large anterior opening of the cavum pterygoidei.
Fil: de la Fuente, Marcelo Saul. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentina
Fil: Maniel, Ignacio Jorge. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentina
Fil: Bogado Diniz, Joaquin Pedro. Universidade Federal de Viçosa; Brasil
Fil: González Ruiz, Pablo. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentina
Fil: Galli, Claudia Inés. Universidad Tecnologica Nacional. Facultad Reg.san Rafael. Instituto de Evolucion, Ecologia Historica y Ambiente. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto de Evolucion, Ecologia Historica y Ambiente.; Argentina
description We reassess the taxonomy of the problematic taxon “Podocnemis” argentinensis from the Maíz Gordo Formation (late Paleocene) at Quebrada Queñoal (type locality), Departamento de Humahuaca, Jujuy province, Argentina. This plastron-based species was initially named as a member of the genus Podocnemis (Podocnemididae) based on the holotype and one referred specimen. Considering the dubious generic assignment of the holotype of “Podocnemis” argentinensis, we performed a thorough revision of the morphological characters of this taxon, based on the holotype and previously undescribed specimens from the same lithostratigraphic unit in the Casa Grande-Vizcarra river area (western flank of the Mal Paso Range, Tres Cruces Sub-basin) in Jujuy province, Argentina. The new referred specimens include a collection of shells found in association with one skull from Quebrada del Agujero, as well as some shells from Quebrada del Puesto in the same region. Comparison between the extended hypodigm of “Podocnemis” argentinensis and other podocnemidids suggests the assignment of this species to a new generic entity, based on the presence of a short preorbital skull portion with steeply curved prefrontal bones, both exoccipital bones with a dorso-medial process restricting the dorsal part of the foramen magnum to a narrow cleft, lateral orbits, absence of an interorbital groove, high maxillae, a large vomer and the generalized gular, extragular and humeral scute pattern. We included this species in a phylogenetic analysis to assess its relationships with other pelomedusoid turtles. It is recovered as the sister taxon of Gestemys powelli, with which it shares the following four synapomorphies: foramen posterius canalis carotici interni outside the basisphenoid, long basioccipital, reduced nuchal embayment and dorsoventral flattening of the shell. The clade including “Podocnemis” argentinensis and Gestemys constitutes a Paleogene Argentinean lineage which is more closely related to Erymnochelyinae and Peltocephalinae than to Podocnemidinae, a position supported by a more covered adductor fossa and a large anterior opening of the cavum pterygoidei.
publishDate 2025
dc.date.none.fl_str_mv 2025-09-25
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/11336/290667
de la Fuente, Marcelo Saul; Maniel, Ignacio Jorge; Bogado Diniz, Joaquin Pedro; González Ruiz, Pablo; Galli, Claudia Inés; Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina; Birkhauser Verlag Ag; Swiss Journal of Palaeontology; 144; 1; 25-9-2025; 1-37
1664-2384
CONICET Digital
CONICET
url http://hdl.handle.net/11336/290667
identifier_str_mv de la Fuente, Marcelo Saul; Maniel, Ignacio Jorge; Bogado Diniz, Joaquin Pedro; González Ruiz, Pablo; Galli, Claudia Inés; Taxonomic reassessment of “Podocnemis” argentinensis (Testudines, Pleurodira) from the Maíz Gordo Formation (late Paleocene) with a description of new specimens from the western flank of Sierra del Mal Paso, Province of Jujuy, Argentina; Birkhauser Verlag Ag; Swiss Journal of Palaeontology; 144; 1; 25-9-2025; 1-37
1664-2384
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/doi/10.1186/s13358-025-00390-5
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eu_rights_str_mv openAccess
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application/pdf
dc.publisher.none.fl_str_mv Birkhauser Verlag Ag
publisher.none.fl_str_mv Birkhauser Verlag Ag
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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