A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina

Autores
Babot, Judith; García López, D. A.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
We describe a new borhyaenoid found at the upper levels of the Lumbrera Formation (Casamayoran SALMA, Barrancan subage) exposed at the locality of El Simbolar, southern Salta Province, Argentina. The material is represented by partially preserved cranial and postcranial remains. The upper molars present a basined lingual portion of the trigon, and a conspicuous protocone. The paraconule and metaconule are present. The stylar shelf bears the parastyle, the stylocone and the cusp C, being the stylocone the most developed element. The most striking feature of the lower molars is the presence of a vestigial metaconid located posterolingually to the protoconid. The talonid is basined and presents a well developed hypoconulid, vertically directed, and very small entoconid and hypoconid. The dentition in this specimen is similar in size to that of Borhyaenidium Pascual and Bocchino and Sipalocyon Ameghino. Nevertheless, the presence of significative differences with these and other borhyaenoids (e.g., presence of metaconid, small but basined talonid, presence of entoconid, hypoconid, and hypoconulid) allows us to refer this material to a new taxon. A phylogenetic analysis including most of the sparassodonts known by well preserved specimens, showed this specimen as a basal form. This material represents the first sparassodont found at the upper levels of the Lumbrera Formation. Other records (e.g., Patene Simpson, Callistoe Babot, Powell and Muizon), come from lower levels, recently referred to the Vacan subage of the Casamayoran.
Simposio II: El Paleógeno de América del Sur y Central.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Paleontología
Paleodontología
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:10915/16625

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network_name_str SEDICI (UNLP)
spelling A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, ArgentinaBabot, JudithGarcía López, D. A.Ciencias NaturalesPaleontologíaPaleodontologíaWe describe a new borhyaenoid found at the upper levels of the Lumbrera Formation (Casamayoran SALMA, Barrancan subage) exposed at the locality of El Simbolar, southern Salta Province, Argentina. The material is represented by partially preserved cranial and postcranial remains. The upper molars present a basined lingual portion of the trigon, and a conspicuous protocone. The paraconule and metaconule are present. The stylar shelf bears the parastyle, the stylocone and the cusp C, being the stylocone the most developed element. The most striking feature of the lower molars is the presence of a vestigial metaconid located posterolingually to the protoconid. The talonid is basined and presents a well developed hypoconulid, vertically directed, and very small entoconid and hypoconid. The dentition in this specimen is similar in size to that of Borhyaenidium Pascual and Bocchino and Sipalocyon Ameghino. Nevertheless, the presence of significative differences with these and other borhyaenoids (e.g., presence of metaconid, small but basined talonid, presence of entoconid, hypoconid, and hypoconulid) allows us to refer this material to a new taxon. A phylogenetic analysis including most of the sparassodonts known by well preserved specimens, showed this specimen as a basal form. This material represents the first sparassodont found at the upper levels of the Lumbrera Formation. Other records (e.g., Patene Simpson, Callistoe Babot, Powell and Muizon), come from lower levels, recently referred to the Vacan subage of the Casamayoran.Simposio II: El Paleógeno de América del Sur y Central.Facultad 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/10915/16625enginfo: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:UNLP2025-09-29T10:52:58Zoai:sedici.unlp.edu.ar:10915/16625Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 10:52:58.341SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina
title A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina
spellingShingle A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina
Babot, Judith
Ciencias Naturales
Paleontología
Paleodontología
title_short A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina
title_full A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina
title_fullStr A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina
title_full_unstemmed A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina
title_sort A new <i>Borhyaenoid</i> (Mammalia, Metatheria, Sparassodonta) from the middle Eocene of Salta Province, Argentina
dc.creator.none.fl_str_mv Babot, Judith
García López, D. A.
author Babot, Judith
author_facet Babot, Judith
García López, D. A.
author_role author
author2 García López, D. A.
author2_role author
dc.subject.none.fl_str_mv Ciencias Naturales
Paleontología
Paleodontología
topic Ciencias Naturales
Paleontología
Paleodontología
dc.description.none.fl_txt_mv We describe a new borhyaenoid found at the upper levels of the Lumbrera Formation (Casamayoran SALMA, Barrancan subage) exposed at the locality of El Simbolar, southern Salta Province, Argentina. The material is represented by partially preserved cranial and postcranial remains. The upper molars present a basined lingual portion of the trigon, and a conspicuous protocone. The paraconule and metaconule are present. The stylar shelf bears the parastyle, the stylocone and the cusp C, being the stylocone the most developed element. The most striking feature of the lower molars is the presence of a vestigial metaconid located posterolingually to the protoconid. The talonid is basined and presents a well developed hypoconulid, vertically directed, and very small entoconid and hypoconid. The dentition in this specimen is similar in size to that of Borhyaenidium Pascual and Bocchino and Sipalocyon Ameghino. Nevertheless, the presence of significative differences with these and other borhyaenoids (e.g., presence of metaconid, small but basined talonid, presence of entoconid, hypoconid, and hypoconulid) allows us to refer this material to a new taxon. A phylogenetic analysis including most of the sparassodonts known by well preserved specimens, showed this specimen as a basal form. This material represents the first sparassodont found at the upper levels of the Lumbrera Formation. Other records (e.g., Patene Simpson, Callistoe Babot, Powell and Muizon), come from lower levels, recently referred to the Vacan subage of the Casamayoran.
Simposio II: El Paleógeno de América del Sur y Central.
Facultad de Ciencias Naturales y Museo
description We describe a new borhyaenoid found at the upper levels of the Lumbrera Formation (Casamayoran SALMA, Barrancan subage) exposed at the locality of El Simbolar, southern Salta Province, Argentina. The material is represented by partially preserved cranial and postcranial remains. The upper molars present a basined lingual portion of the trigon, and a conspicuous protocone. The paraconule and metaconule are present. The stylar shelf bears the parastyle, the stylocone and the cusp C, being the stylocone the most developed element. The most striking feature of the lower molars is the presence of a vestigial metaconid located posterolingually to the protoconid. The talonid is basined and presents a well developed hypoconulid, vertically directed, and very small entoconid and hypoconid. The dentition in this specimen is similar in size to that of Borhyaenidium Pascual and Bocchino and Sipalocyon Ameghino. Nevertheless, the presence of significative differences with these and other borhyaenoids (e.g., presence of metaconid, small but basined talonid, presence of entoconid, hypoconid, and hypoconulid) allows us to refer this material to a new taxon. A phylogenetic analysis including most of the sparassodonts known by well preserved specimens, showed this specimen as a basal form. This material represents the first sparassodont found at the upper levels of the Lumbrera Formation. Other records (e.g., Patene Simpson, Callistoe Babot, Powell and Muizon), come from lower levels, recently referred to the Vacan subage of the Casamayoran.
publishDate 2010
dc.date.none.fl_str_mv 2010
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dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/16625
url http://sedici.unlp.edu.ar/handle/10915/16625
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
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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
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