Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates

Autores
Ercoli, Marcos Darío; Alvarez, Alicia; Candela, Adriana Magdalena
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Notoungulates were a diverse group of South American ungulates that included the rodent-like typotherians. However, they are typically compared with other ungulates and interpreted as grazers. Here we present the first detailed reconstruction of the masticatory muscles of the pachyrukhine typotherians Paedotherium and Tremacyllus. An outstanding feature is the presence of a true sciuromorph condition, defined by an anterior portion of the deep masseter muscle originating from a wide zygomatic plate that reaches the rostrum, a trait traceable since the Oligocene pachyrukhines. Consequently, pachyrukhines are the first case of sciuromorph non-rodent mammals. This morphology would have allowed them to explore ecological niches unavailable for the exclusively hystricomorph coexisting rodents. This innovative acquisition seems to be synchronous in Pachyrukhinae and sciuromorph rodents and related to hard-food consumption. We postulate the expansion of nut and cone trees during the major environmental changes at Eocene−Oligocene transition as a potential trigger for this convergence.
Fil: Ercoli, Marcos Darío. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
Fil: Alvarez, Alicia. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
Fil: Candela, Adriana Magdalena. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Materia
PACHYRUKHINAE
NOTOUNGULATA
PALEOECOLOGY
FUNCTIONAL ANATOMY
SCIUROMORPH CONDITION
RODENTIA
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:11336/122982
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulatesErcoli, Marcos DaríoAlvarez, AliciaCandela, Adriana MagdalenaPACHYRUKHINAENOTOUNGULATAPALEOECOLOGYFUNCTIONAL ANATOMYSCIUROMORPH CONDITIONRODENTIAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Notoungulates were a diverse group of South American ungulates that included the rodent-like typotherians. However, they are typically compared with other ungulates and interpreted as grazers. Here we present the first detailed reconstruction of the masticatory muscles of the pachyrukhine typotherians Paedotherium and Tremacyllus. An outstanding feature is the presence of a true sciuromorph condition, defined by an anterior portion of the deep masseter muscle originating from a wide zygomatic plate that reaches the rostrum, a trait traceable since the Oligocene pachyrukhines. Consequently, pachyrukhines are the first case of sciuromorph non-rodent mammals. This morphology would have allowed them to explore ecological niches unavailable for the exclusively hystricomorph coexisting rodents. This innovative acquisition seems to be synchronous in Pachyrukhinae and sciuromorph rodents and related to hard-food consumption. We postulate the expansion of nut and cone trees during the major environmental changes at Eocene−Oligocene transition as a potential trigger for this convergence.Fil: Ercoli, Marcos Darío. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; ArgentinaFil: Alvarez, Alicia. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; ArgentinaFil: Candela, Adriana Magdalena. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaNature Publishing Group2019-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/122982Ercoli, Marcos Darío; Alvarez, Alicia; Candela, Adriana Magdalena; Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates; Nature Publishing Group; Communications Biology; 2; 202; 6-2019; 1-112399-3642CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1038/s42003-019-0423-5info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s42003-019-0423-5info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T10:04:14Zoai:ri.conicet.gov.ar:11336/122982instacron: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:34982025-11-05 10:04:15.163CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
title Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
spellingShingle Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
Ercoli, Marcos Darío
PACHYRUKHINAE
NOTOUNGULATA
PALEOECOLOGY
FUNCTIONAL ANATOMY
SCIUROMORPH CONDITION
RODENTIA
title_short Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
title_full Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
title_fullStr Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
title_full_unstemmed Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
title_sort Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
dc.creator.none.fl_str_mv Ercoli, Marcos Darío
Alvarez, Alicia
Candela, Adriana Magdalena
author Ercoli, Marcos Darío
author_facet Ercoli, Marcos Darío
Alvarez, Alicia
Candela, Adriana Magdalena
author_role author
author2 Alvarez, Alicia
Candela, Adriana Magdalena
author2_role author
author
dc.subject.none.fl_str_mv PACHYRUKHINAE
NOTOUNGULATA
PALEOECOLOGY
FUNCTIONAL ANATOMY
SCIUROMORPH CONDITION
RODENTIA
topic PACHYRUKHINAE
NOTOUNGULATA
PALEOECOLOGY
FUNCTIONAL ANATOMY
SCIUROMORPH CONDITION
RODENTIA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Notoungulates were a diverse group of South American ungulates that included the rodent-like typotherians. However, they are typically compared with other ungulates and interpreted as grazers. Here we present the first detailed reconstruction of the masticatory muscles of the pachyrukhine typotherians Paedotherium and Tremacyllus. An outstanding feature is the presence of a true sciuromorph condition, defined by an anterior portion of the deep masseter muscle originating from a wide zygomatic plate that reaches the rostrum, a trait traceable since the Oligocene pachyrukhines. Consequently, pachyrukhines are the first case of sciuromorph non-rodent mammals. This morphology would have allowed them to explore ecological niches unavailable for the exclusively hystricomorph coexisting rodents. This innovative acquisition seems to be synchronous in Pachyrukhinae and sciuromorph rodents and related to hard-food consumption. We postulate the expansion of nut and cone trees during the major environmental changes at Eocene−Oligocene transition as a potential trigger for this convergence.
Fil: Ercoli, Marcos Darío. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
Fil: Alvarez, Alicia. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
Fil: Candela, Adriana Magdalena. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
description Notoungulates were a diverse group of South American ungulates that included the rodent-like typotherians. However, they are typically compared with other ungulates and interpreted as grazers. Here we present the first detailed reconstruction of the masticatory muscles of the pachyrukhine typotherians Paedotherium and Tremacyllus. An outstanding feature is the presence of a true sciuromorph condition, defined by an anterior portion of the deep masseter muscle originating from a wide zygomatic plate that reaches the rostrum, a trait traceable since the Oligocene pachyrukhines. Consequently, pachyrukhines are the first case of sciuromorph non-rodent mammals. This morphology would have allowed them to explore ecological niches unavailable for the exclusively hystricomorph coexisting rodents. This innovative acquisition seems to be synchronous in Pachyrukhinae and sciuromorph rodents and related to hard-food consumption. We postulate the expansion of nut and cone trees during the major environmental changes at Eocene−Oligocene transition as a potential trigger for this convergence.
publishDate 2019
dc.date.none.fl_str_mv 2019-06
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/11336/122982
Ercoli, Marcos Darío; Alvarez, Alicia; Candela, Adriana Magdalena; Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates; Nature Publishing Group; Communications Biology; 2; 202; 6-2019; 1-11
2399-3642
CONICET Digital
CONICET
url http://hdl.handle.net/11336/122982
identifier_str_mv Ercoli, Marcos Darío; Alvarez, Alicia; Candela, Adriana Magdalena; Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates; Nature Publishing Group; Communications Biology; 2; 202; 6-2019; 1-11
2399-3642
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1038/s42003-019-0423-5
info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s42003-019-0423-5
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
dc.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
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 13.121305

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