A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)

Autores
Forasiepi, Analía; Goin, Francisco Javier; Sigé, Bernard; Cerdeño Serrano, María Esperanza
Año de publicación
2010
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
A new metatherian was recently found in the Quebrada Fiera locality (southern Mendoza Province, Argentina), in late Oligocene deposits (Agua de la Piedra Formation; Deseadan SALMA). The specimen consists of fragments of both dentaries, the right maxilla, and a fragment of the left premaxilla with dentition, all belonging to a single, subadult individual. The teeth are represented by seven upper and lower antemolars and at least three molars, with an inferred dental formula of I/I?3/3, C/c1/1, P/p3/3, M/m?3/?3. Among the most conspicuous dental features are worth mentioning the following: caniniform-like first upper incisor; enlarged and flattened second and third upper incisors; large, procumbent first lower incisor; a single deciduous tooth in the upper and lower dentitions with complex morphology; upper molars with a broad stylar shelf bearing a tall StB (slightly lower than metacone) and StD; parastyle developed at the end of the anterior cingulum, which is lower than the stylar shelf; hypoconelike talon, basal to the protocone at least in the M1; lower molars with reduced, low paraconid which is located close to the mid portion of the trigonid; low metaconid appresed to the protoconid in m1 and slightly distant in m2; columnar entoconid without the associated preentocristid; extremely reduced hypoconulid in median position, and lack of posterior cingulum. The new specimen has a unique combination of features among metatherians and other mammalian lineages of Deseadan age, including the well-known faunas from Patagonia. Several features are strongly convergent with erinaceomorphans, such as the presence of a large and procumbent first lower incisor, hypocone-like talon, and median hypoconulid. Its phylogenetic affinities are difficult to establish a priori, even though features of the dentition suggest probable derorhynchid ("Didelphimorphia") affinities.
Simposio V: Los mamíferos oligocenos de América del Sur: explosión evolutiva de los mamíferos nativos y llegada de los emigrantes africanos
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Paleontología
Insectivoran
Metatherian
Argentina
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:10915/16674

id SEDICI_bc08afcf3573ea666a5f55ea5a6cf09e
oai_identifier_str oai:sedici.unlp.edu.ar:10915/16674
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)Forasiepi, AnalíaGoin, Francisco JavierSigé, BernardCerdeño Serrano, María EsperanzaCiencias NaturalesPaleontologíaInsectivoranMetatherianArgentinaA new metatherian was recently found in the Quebrada Fiera locality (southern Mendoza Province, Argentina), in late Oligocene deposits (Agua de la Piedra Formation; Deseadan SALMA). The specimen consists of fragments of both dentaries, the right maxilla, and a fragment of the left premaxilla with dentition, all belonging to a single, subadult individual. The teeth are represented by seven upper and lower antemolars and at least three molars, with an inferred dental formula of I/I?3/3, C/c1/1, P/p3/3, M/m?3/?3. Among the most conspicuous dental features are worth mentioning the following: caniniform-like first upper incisor; enlarged and flattened second and third upper incisors; large, procumbent first lower incisor; a single deciduous tooth in the upper and lower dentitions with complex morphology; upper molars with a broad stylar shelf bearing a tall StB (slightly lower than metacone) and StD; parastyle developed at the end of the anterior cingulum, which is lower than the stylar shelf; hypoconelike talon, basal to the protocone at least in the M1; lower molars with reduced, low paraconid which is located close to the mid portion of the trigonid; low metaconid appresed to the protoconid in m1 and slightly distant in m2; columnar entoconid without the associated preentocristid; extremely reduced hypoconulid in median position, and lack of posterior cingulum. The new specimen has a unique combination of features among metatherians and other mammalian lineages of Deseadan age, including the well-known faunas from Patagonia. Several features are strongly convergent with erinaceomorphans, such as the presence of a large and procumbent first lower incisor, hypocone-like talon, and median hypoconulid. Its phylogenetic affinities are difficult to establish a priori, even though features of the dentition suggest probable derorhynchid ("Didelphimorphia") affinities.Simposio V: Los mamíferos oligocenos de América del Sur: explosión evolutiva de los mamíferos nativos y llegada de los emigrantes africanosFacultad de Ciencias Naturales y Museo2010info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionResumenhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/16674enginfo:eu-repo/semantics/altIdentifier/isbn/978-987-95849-7-2info:eu-repo/semantics/reference/hdl/10915/25738info: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:UNLP2025-09-03T10:25:49Zoai:sedici.unlp.edu.ar:10915/16674Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:25:49.642SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)
title A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)
spellingShingle A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)
Forasiepi, Analía
Ciencias Naturales
Paleontología
Insectivoran
Metatherian
Argentina
title_short A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)
title_full A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)
title_fullStr A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)
title_full_unstemmed A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)
title_sort A new insectivoran-like metatherian from western Argentina (Quebrada Fiera, Mendoza Province, Deseadan Age, late Oligocene)
dc.creator.none.fl_str_mv Forasiepi, Analía
Goin, Francisco Javier
Sigé, Bernard
Cerdeño Serrano, María Esperanza
author Forasiepi, Analía
author_facet Forasiepi, Analía
Goin, Francisco Javier
Sigé, Bernard
Cerdeño Serrano, María Esperanza
author_role author
author2 Goin, Francisco Javier
Sigé, Bernard
Cerdeño Serrano, María Esperanza
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Paleontología
Insectivoran
Metatherian
Argentina
topic Ciencias Naturales
Paleontología
Insectivoran
Metatherian
Argentina
dc.description.none.fl_txt_mv A new metatherian was recently found in the Quebrada Fiera locality (southern Mendoza Province, Argentina), in late Oligocene deposits (Agua de la Piedra Formation; Deseadan SALMA). The specimen consists of fragments of both dentaries, the right maxilla, and a fragment of the left premaxilla with dentition, all belonging to a single, subadult individual. The teeth are represented by seven upper and lower antemolars and at least three molars, with an inferred dental formula of I/I?3/3, C/c1/1, P/p3/3, M/m?3/?3. Among the most conspicuous dental features are worth mentioning the following: caniniform-like first upper incisor; enlarged and flattened second and third upper incisors; large, procumbent first lower incisor; a single deciduous tooth in the upper and lower dentitions with complex morphology; upper molars with a broad stylar shelf bearing a tall StB (slightly lower than metacone) and StD; parastyle developed at the end of the anterior cingulum, which is lower than the stylar shelf; hypoconelike talon, basal to the protocone at least in the M1; lower molars with reduced, low paraconid which is located close to the mid portion of the trigonid; low metaconid appresed to the protoconid in m1 and slightly distant in m2; columnar entoconid without the associated preentocristid; extremely reduced hypoconulid in median position, and lack of posterior cingulum. The new specimen has a unique combination of features among metatherians and other mammalian lineages of Deseadan age, including the well-known faunas from Patagonia. Several features are strongly convergent with erinaceomorphans, such as the presence of a large and procumbent first lower incisor, hypocone-like talon, and median hypoconulid. Its phylogenetic affinities are difficult to establish a priori, even though features of the dentition suggest probable derorhynchid ("Didelphimorphia") affinities.
Simposio V: Los mamíferos oligocenos de América del Sur: explosión evolutiva de los mamíferos nativos y llegada de los emigrantes africanos
Facultad de Ciencias Naturales y Museo
description A new metatherian was recently found in the Quebrada Fiera locality (southern Mendoza Province, Argentina), in late Oligocene deposits (Agua de la Piedra Formation; Deseadan SALMA). The specimen consists of fragments of both dentaries, the right maxilla, and a fragment of the left premaxilla with dentition, all belonging to a single, subadult individual. The teeth are represented by seven upper and lower antemolars and at least three molars, with an inferred dental formula of I/I?3/3, C/c1/1, P/p3/3, M/m?3/?3. Among the most conspicuous dental features are worth mentioning the following: caniniform-like first upper incisor; enlarged and flattened second and third upper incisors; large, procumbent first lower incisor; a single deciduous tooth in the upper and lower dentitions with complex morphology; upper molars with a broad stylar shelf bearing a tall StB (slightly lower than metacone) and StD; parastyle developed at the end of the anterior cingulum, which is lower than the stylar shelf; hypoconelike talon, basal to the protocone at least in the M1; lower molars with reduced, low paraconid which is located close to the mid portion of the trigonid; low metaconid appresed to the protoconid in m1 and slightly distant in m2; columnar entoconid without the associated preentocristid; extremely reduced hypoconulid in median position, and lack of posterior cingulum. The new specimen has a unique combination of features among metatherians and other mammalian lineages of Deseadan age, including the well-known faunas from Patagonia. Several features are strongly convergent with erinaceomorphans, such as the presence of a large and procumbent first lower incisor, hypocone-like talon, and median hypoconulid. Its phylogenetic affinities are difficult to establish a priori, even though features of the dentition suggest probable derorhynchid ("Didelphimorphia") affinities.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
Resumen
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/16674
url http://sedici.unlp.edu.ar/handle/10915/16674
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/isbn/978-987-95849-7-2
info:eu-repo/semantics/reference/hdl/10915/25738
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)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1842260090145472512
score 13.13397