The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina

Autores
Cerdeño Serrano, María Esperanza; Reguero, Marcelo Alfredo
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This study describes new remains of Hegetotheriidae (Notoungulata), including a new species, from the Deseadan (late Oligocene) of Quebrada Fiera, Mendoza Province, Argentina. The assemblage is composed of four hegetotheriines, Prohegetotherium cf. P. sculptum, Prohegetotherium sp., Prohegetotherium schiaffinoi, Prohegetotherium malalhuense sp. nov., and the pachyrukhine Propachyrucos cf. P. simpsoni. The presence of Prosotherium cannot be totally discarded as lower molariforms are rather similar between both pachyrukhine genera. The new species Prohegetotherium malalhuense sp. nov. differs from all previously described hegetotheriines by lingually projecting, sharp parastyle and marked parastyle groove on ectoloph of M2-3; talonid of m1-m2 posterolabially projected; talonid of m3 with marked posterolabial groove; and smaller size. Its phylogenetic affinities are not well resolved; Prohegetotherium results paraphyletic, with P. sculptum as sister taxon of the remaining hegetotheres, and the new taxon more related to Hegetotherium mirabile than to P. schiaffinoi. The recognition of P. schiaffinoi and Prohegetotherium cf. P. sculptum emphasizes that the fauna from Quebrada Fiera shares elements with roughly contemporaneous Deseadan faunas from northern and southern latitudes, but important faunal particularities distinguish the region as well. The record of pachyrukhines at Quebrada Fiera more closely resembles Deseadan faunas in Patagonia than temporally correlative faunas from Bolivia and Uruguay, and indicates the presence of suitable habitats in mid-latitudes of Argentina for this hypselodont clade. Faunal affinities together with particular taxa from Quebrada Fiera seem to support a significant faunal provinciality in South America during the late Oligocene.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Systematics
Hegetotheriids
Quebrada Fiera
Mendoza
Deseadan age
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/100640
Acceder
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network_name_str SEDICI (UNLP)
spelling The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western ArgentinaCerdeño Serrano, María EsperanzaReguero, Marcelo AlfredoCiencias NaturalesSystematicsHegetotheriidsQuebrada FieraMendozaDeseadan ageThis study describes new remains of Hegetotheriidae (Notoungulata), including a new species, from the Deseadan (late Oligocene) of Quebrada Fiera, Mendoza Province, Argentina. The assemblage is composed of four hegetotheriines, Prohegetotherium cf. P. sculptum, Prohegetotherium sp., Prohegetotherium schiaffinoi, Prohegetotherium malalhuense sp. nov., and the pachyrukhine Propachyrucos cf. P. simpsoni. The presence of Prosotherium cannot be totally discarded as lower molariforms are rather similar between both pachyrukhine genera. The new species Prohegetotherium malalhuense sp. nov. differs from all previously described hegetotheriines by lingually projecting, sharp parastyle and marked parastyle groove on ectoloph of M2-3; talonid of m1-m2 posterolabially projected; talonid of m3 with marked posterolabial groove; and smaller size. Its phylogenetic affinities are not well resolved; Prohegetotherium results paraphyletic, with P. sculptum as sister taxon of the remaining hegetotheres, and the new taxon more related to Hegetotherium mirabile than to P. schiaffinoi. The recognition of P. schiaffinoi and Prohegetotherium cf. P. sculptum emphasizes that the fauna from Quebrada Fiera shares elements with roughly contemporaneous Deseadan faunas from northern and southern latitudes, but important faunal particularities distinguish the region as well. The record of pachyrukhines at Quebrada Fiera more closely resembles Deseadan faunas in Patagonia than temporally correlative faunas from Bolivia and Uruguay, and indicates the presence of suitable habitats in mid-latitudes of Argentina for this hypselodont clade. Faunal affinities together with particular taxa from Quebrada Fiera seem to support a significant faunal provinciality in South America during the late Oligocene.Facultad de Ciencias Naturales y Museo2015-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/100640enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/48566info:eu-repo/semantics/altIdentifier/issn/0272-4634info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2014.907173info:eu-repo/semantics/altIdentifier/hdl/11336/48566info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:52:20Zoai:sedici.unlp.edu.ar:10915/100640Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:52:21.21SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
spellingShingle The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
Cerdeño Serrano, María Esperanza
Ciencias Naturales
Systematics
Hegetotheriids
Quebrada Fiera
Mendoza
Deseadan age
title_short The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_full The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_fullStr The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_full_unstemmed The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_sort The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
dc.creator.none.fl_str_mv Cerdeño Serrano, María Esperanza
Reguero, Marcelo Alfredo
author Cerdeño Serrano, María Esperanza
author_facet Cerdeño Serrano, María Esperanza
Reguero, Marcelo Alfredo
author_role author
author2 Reguero, Marcelo Alfredo
author2_role author
dc.subject.none.fl_str_mv Ciencias Naturales
Systematics
Hegetotheriids
Quebrada Fiera
Mendoza
Deseadan age
topic Ciencias Naturales
Systematics
Hegetotheriids
Quebrada Fiera
Mendoza
Deseadan age
dc.description.none.fl_txt_mv This study describes new remains of Hegetotheriidae (Notoungulata), including a new species, from the Deseadan (late Oligocene) of Quebrada Fiera, Mendoza Province, Argentina. The assemblage is composed of four hegetotheriines, Prohegetotherium cf. P. sculptum, Prohegetotherium sp., Prohegetotherium schiaffinoi, Prohegetotherium malalhuense sp. nov., and the pachyrukhine Propachyrucos cf. P. simpsoni. The presence of Prosotherium cannot be totally discarded as lower molariforms are rather similar between both pachyrukhine genera. The new species Prohegetotherium malalhuense sp. nov. differs from all previously described hegetotheriines by lingually projecting, sharp parastyle and marked parastyle groove on ectoloph of M2-3; talonid of m1-m2 posterolabially projected; talonid of m3 with marked posterolabial groove; and smaller size. Its phylogenetic affinities are not well resolved; Prohegetotherium results paraphyletic, with P. sculptum as sister taxon of the remaining hegetotheres, and the new taxon more related to Hegetotherium mirabile than to P. schiaffinoi. The recognition of P. schiaffinoi and Prohegetotherium cf. P. sculptum emphasizes that the fauna from Quebrada Fiera shares elements with roughly contemporaneous Deseadan faunas from northern and southern latitudes, but important faunal particularities distinguish the region as well. The record of pachyrukhines at Quebrada Fiera more closely resembles Deseadan faunas in Patagonia than temporally correlative faunas from Bolivia and Uruguay, and indicates the presence of suitable habitats in mid-latitudes of Argentina for this hypselodont clade. Faunal affinities together with particular taxa from Quebrada Fiera seem to support a significant faunal provinciality in South America during the late Oligocene.
Facultad de Ciencias Naturales y Museo
description This study describes new remains of Hegetotheriidae (Notoungulata), including a new species, from the Deseadan (late Oligocene) of Quebrada Fiera, Mendoza Province, Argentina. The assemblage is composed of four hegetotheriines, Prohegetotherium cf. P. sculptum, Prohegetotherium sp., Prohegetotherium schiaffinoi, Prohegetotherium malalhuense sp. nov., and the pachyrukhine Propachyrucos cf. P. simpsoni. The presence of Prosotherium cannot be totally discarded as lower molariforms are rather similar between both pachyrukhine genera. The new species Prohegetotherium malalhuense sp. nov. differs from all previously described hegetotheriines by lingually projecting, sharp parastyle and marked parastyle groove on ectoloph of M2-3; talonid of m1-m2 posterolabially projected; talonid of m3 with marked posterolabial groove; and smaller size. Its phylogenetic affinities are not well resolved; Prohegetotherium results paraphyletic, with P. sculptum as sister taxon of the remaining hegetotheres, and the new taxon more related to Hegetotherium mirabile than to P. schiaffinoi. The recognition of P. schiaffinoi and Prohegetotherium cf. P. sculptum emphasizes that the fauna from Quebrada Fiera shares elements with roughly contemporaneous Deseadan faunas from northern and southern latitudes, but important faunal particularities distinguish the region as well. The record of pachyrukhines at Quebrada Fiera more closely resembles Deseadan faunas in Patagonia than temporally correlative faunas from Bolivia and Uruguay, and indicates the presence of suitable habitats in mid-latitudes of Argentina for this hypselodont clade. Faunal affinities together with particular taxa from Quebrada Fiera seem to support a significant faunal provinciality in South America during the late Oligocene.
publishDate 2015
dc.date.none.fl_str_mv 2015-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/100640
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info:eu-repo/semantics/altIdentifier/issn/0272-4634
info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2014.907173
info:eu-repo/semantics/altIdentifier/hdl/11336/48566
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
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