The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon

Autores
Gaetano, Leandro Carlos; Abdala, F.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Only two cynodont taxa have been reported from the Upper Triassic Los Colorados Formation, northwestern Argentina. One of them is represented by a few postcranial elements (PVL 3849) assigned to confer Tritylodon. Tritylodontids are specialized herbivorous non-mammaliaform cynodonts, exceptionally well represented in Laurasia but not so diverse in Gondwana. If correctly identified, the Norian Los Colorados specimen would represent the oldest record of tritylodontids and the only documentation of this clade in South America. This specimen includes the proximal portion of a femur, tibia and fibula, the distal portion of a humerus, and two sets of two articulated dorsal vertebrae. The notorious size difference between some of the bones suggests that two individuals are represented under the same collection number. After a thorough comparative exercise of the limited remains of PVL 3849 with abundant African specimens of the monospecific Tritylodon longaevus, we consider that the material from the Los Colorados Formation should be regarded as an undetermined cynodont different from Tritylodon longaevus. Comparisons with Pachygenelus show that tritheledontid affinities for PVL 3849 cannot be discarded. The only other cynodont record for the Los Colorados Formation is represented by two imperfectly preserved skulls of the tritheledontid Chaliminia musteloides. Postcranial remains of PVL 3849 are interpreted to be much larger than what is expected for the skull size of known individuals of Chaliminia; thus, co-specific affinities do not seem to be supported. The evidence available points to the presence of a still unrecognized cynodont taxon from the Los Colorados Formation.
Fil: Gaetano, Leandro Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Abdala, F.. University of the Witwatersrand; Sudáfrica
XXX Jornadas Argentinas de Paleontología de Vertebrados
Ciudad Autónoma de Buenos Aires
Argentina
Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"
Asociación Paleontológica Argentina
Materia
CYNODONTS
UPPER TRIASIC
ARGENTINA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/280830
Acceder
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network_name_str CONICET Digital (CONICET)
spelling The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of TritylodonGaetano, Leandro CarlosAbdala, F.CYNODONTSUPPER TRIASICARGENTINAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Only two cynodont taxa have been reported from the Upper Triassic Los Colorados Formation, northwestern Argentina. One of them is represented by a few postcranial elements (PVL 3849) assigned to confer Tritylodon. Tritylodontids are specialized herbivorous non-mammaliaform cynodonts, exceptionally well represented in Laurasia but not so diverse in Gondwana. If correctly identified, the Norian Los Colorados specimen would represent the oldest record of tritylodontids and the only documentation of this clade in South America. This specimen includes the proximal portion of a femur, tibia and fibula, the distal portion of a humerus, and two sets of two articulated dorsal vertebrae. The notorious size difference between some of the bones suggests that two individuals are represented under the same collection number. After a thorough comparative exercise of the limited remains of PVL 3849 with abundant African specimens of the monospecific Tritylodon longaevus, we consider that the material from the Los Colorados Formation should be regarded as an undetermined cynodont different from Tritylodon longaevus. Comparisons with Pachygenelus show that tritheledontid affinities for PVL 3849 cannot be discarded. The only other cynodont record for the Los Colorados Formation is represented by two imperfectly preserved skulls of the tritheledontid Chaliminia musteloides. Postcranial remains of PVL 3849 are interpreted to be much larger than what is expected for the skull size of known individuals of Chaliminia; thus, co-specific affinities do not seem to be supported. The evidence available points to the presence of a still unrecognized cynodont taxon from the Los Colorados Formation.Fil: Gaetano, Leandro Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Abdala, F.. University of the Witwatersrand; SudáfricaXXX Jornadas Argentinas de Paleontología de VertebradosCiudad Autónoma de Buenos AiresArgentinaMuseo Argentino de Ciencias Naturales "Bernardino Rivadavia"Asociación Paleontológica ArgentinaAsociación Paleontológica Argentina2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectJornadaJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/280830The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon; XXX Jornadas Argentinas de Paleontología de Vertebrados; Ciudad Autónoma de Buenos Aires; Argentina; 2016; 18-181851-8044CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.ameghiniana.org.ar/index.php/ameghiniana/issue/view/263Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-06T12:01:05Zoai:ri.conicet.gov.ar:11336/280830instacron: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:34982026-02-06 12:01:06.165CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon
title The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon
spellingShingle The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon
Gaetano, Leandro Carlos
CYNODONTS
UPPER TRIASIC
ARGENTINA
title_short The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon
title_full The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon
title_fullStr The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon
title_full_unstemmed The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon
title_sort The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon
dc.creator.none.fl_str_mv Gaetano, Leandro Carlos
Abdala, F.
author Gaetano, Leandro Carlos
author_facet Gaetano, Leandro Carlos
Abdala, F.
author_role author
author2 Abdala, F.
author2_role author
dc.subject.none.fl_str_mv CYNODONTS
UPPER TRIASIC
ARGENTINA
topic CYNODONTS
UPPER TRIASIC
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 Only two cynodont taxa have been reported from the Upper Triassic Los Colorados Formation, northwestern Argentina. One of them is represented by a few postcranial elements (PVL 3849) assigned to confer Tritylodon. Tritylodontids are specialized herbivorous non-mammaliaform cynodonts, exceptionally well represented in Laurasia but not so diverse in Gondwana. If correctly identified, the Norian Los Colorados specimen would represent the oldest record of tritylodontids and the only documentation of this clade in South America. This specimen includes the proximal portion of a femur, tibia and fibula, the distal portion of a humerus, and two sets of two articulated dorsal vertebrae. The notorious size difference between some of the bones suggests that two individuals are represented under the same collection number. After a thorough comparative exercise of the limited remains of PVL 3849 with abundant African specimens of the monospecific Tritylodon longaevus, we consider that the material from the Los Colorados Formation should be regarded as an undetermined cynodont different from Tritylodon longaevus. Comparisons with Pachygenelus show that tritheledontid affinities for PVL 3849 cannot be discarded. The only other cynodont record for the Los Colorados Formation is represented by two imperfectly preserved skulls of the tritheledontid Chaliminia musteloides. Postcranial remains of PVL 3849 are interpreted to be much larger than what is expected for the skull size of known individuals of Chaliminia; thus, co-specific affinities do not seem to be supported. The evidence available points to the presence of a still unrecognized cynodont taxon from the Los Colorados Formation.
Fil: Gaetano, Leandro Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Abdala, F.. University of the Witwatersrand; Sudáfrica
XXX Jornadas Argentinas de Paleontología de Vertebrados
Ciudad Autónoma de Buenos Aires
Argentina
Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"
Asociación Paleontológica Argentina
description Only two cynodont taxa have been reported from the Upper Triassic Los Colorados Formation, northwestern Argentina. One of them is represented by a few postcranial elements (PVL 3849) assigned to confer Tritylodon. Tritylodontids are specialized herbivorous non-mammaliaform cynodonts, exceptionally well represented in Laurasia but not so diverse in Gondwana. If correctly identified, the Norian Los Colorados specimen would represent the oldest record of tritylodontids and the only documentation of this clade in South America. This specimen includes the proximal portion of a femur, tibia and fibula, the distal portion of a humerus, and two sets of two articulated dorsal vertebrae. The notorious size difference between some of the bones suggests that two individuals are represented under the same collection number. After a thorough comparative exercise of the limited remains of PVL 3849 with abundant African specimens of the monospecific Tritylodon longaevus, we consider that the material from the Los Colorados Formation should be regarded as an undetermined cynodont different from Tritylodon longaevus. Comparisons with Pachygenelus show that tritheledontid affinities for PVL 3849 cannot be discarded. The only other cynodont record for the Los Colorados Formation is represented by two imperfectly preserved skulls of the tritheledontid Chaliminia musteloides. Postcranial remains of PVL 3849 are interpreted to be much larger than what is expected for the skull size of known individuals of Chaliminia; thus, co-specific affinities do not seem to be supported. The evidence available points to the presence of a still unrecognized cynodont taxon from the Los Colorados Formation.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Jornada
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/280830
The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon; XXX Jornadas Argentinas de Paleontología de Vertebrados; Ciudad Autónoma de Buenos Aires; Argentina; 2016; 18-18
1851-8044
CONICET Digital
CONICET
url http://hdl.handle.net/11336/280830
identifier_str_mv The cynodonts of the Upper Triassic Los Colorados Formation (La Rioja, Argentina): on the purported presence of Tritylodon; XXX Jornadas Argentinas de Paleontología de Vertebrados; Ciudad Autónoma de Buenos Aires; Argentina; 2016; 18-18
1851-8044
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.ameghiniana.org.ar/index.php/ameghiniana/issue/view/263
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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 13.106097

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