New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position

Autores
Lecuona, Agustina; Desojo, Julia Brenda; Pol, Diego
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Gracilisuchus stipanicicorum Romer, 1972a, the only species in its genus, is a small basal suchian, recovered from the Middle?Late Triassic Chañares Formation (La Rioja, Argentina). This species has been interpreted as related to vari- ous taxa within Archosauria, including Ornithosuchidae, Rauisuchidae and Crocodylomorpha. Recent phylogenetic analyses are concordant in recovering it in a basal position within Suchia, and the most recent analysis recovered it within the clade Gracilisuchidae. Six specimens of G. stipanicicorum are known and all of them were studied and included in a phylogenetic analysis of Archosauriformes. Re-examination of the specimens allowed us to improve the diagnosis, identify new diagnostic characters (e.g. first sacral rib with a slight distal expansion relative to the proximal portion) and, in particular, redescribe the postcranial skeleton. The phylogenetic data matrix is an updated version of a previous study with the inclusion of additional characters and taxa. The strict consensus supports the most recent phylogenetic results, recovering Gracilisuchus as a basal suchian within Gracilisuchidae. The results of this analysis resolve some important polytomies and yield higher support values than recent analyses. All previous alternative hypotheses on the affinities of Gracilisuchus were found to be highly suboptimal for the new data matrix.
Fil: Lecuona, Agustina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; Argentina
Fil: Pol, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Materia
Archosauria
Triassic
Gracilisuchus
Phylogeny
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:11336/41022
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic positionLecuona, AgustinaDesojo, Julia BrendaPol, DiegoArchosauriaTriassicGracilisuchusPhylogenyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Gracilisuchus stipanicicorum Romer, 1972a, the only species in its genus, is a small basal suchian, recovered from the Middle?Late Triassic Chañares Formation (La Rioja, Argentina). This species has been interpreted as related to vari- ous taxa within Archosauria, including Ornithosuchidae, Rauisuchidae and Crocodylomorpha. Recent phylogenetic analyses are concordant in recovering it in a basal position within Suchia, and the most recent analysis recovered it within the clade Gracilisuchidae. Six specimens of G. stipanicicorum are known and all of them were studied and included in a phylogenetic analysis of Archosauriformes. Re-examination of the specimens allowed us to improve the diagnosis, identify new diagnostic characters (e.g. first sacral rib with a slight distal expansion relative to the proximal portion) and, in particular, redescribe the postcranial skeleton. The phylogenetic data matrix is an updated version of a previous study with the inclusion of additional characters and taxa. The strict consensus supports the most recent phylogenetic results, recovering Gracilisuchus as a basal suchian within Gracilisuchidae. The results of this analysis resolve some important polytomies and yield higher support values than recent analyses. All previous alternative hypotheses on the affinities of Gracilisuchus were found to be highly suboptimal for the new data matrix.Fil: Lecuona, Agustina. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; ArgentinaFil: Pol, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; ArgentinaWiley Blackwell Publishing, Inc2017-05info: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/11336/41022Lecuona, Agustina; Desojo, Julia Brenda; Pol, Diego; New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position; Wiley Blackwell Publishing, Inc; Zoological Journal of the Linnean Society; 181; 3; 5-2017; 1-400024-4082CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/zoolinnean/zlx011info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/zoolinnean/article-abstract/181/3/638/3854755info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T12:59:44Zoai:ri.conicet.gov.ar:11336/41022instacron: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:34982025-09-10 12:59:45.126CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position
title New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position
spellingShingle New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position
Lecuona, Agustina
Archosauria
Triassic
Gracilisuchus
Phylogeny
title_short New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position
title_full New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position
title_fullStr New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position
title_full_unstemmed New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position
title_sort New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position
dc.creator.none.fl_str_mv Lecuona, Agustina
Desojo, Julia Brenda
Pol, Diego
author Lecuona, Agustina
author_facet Lecuona, Agustina
Desojo, Julia Brenda
Pol, Diego
author_role author
author2 Desojo, Julia Brenda
Pol, Diego
author2_role author
author
dc.subject.none.fl_str_mv Archosauria
Triassic
Gracilisuchus
Phylogeny
topic Archosauria
Triassic
Gracilisuchus
Phylogeny
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Gracilisuchus stipanicicorum Romer, 1972a, the only species in its genus, is a small basal suchian, recovered from the Middle?Late Triassic Chañares Formation (La Rioja, Argentina). This species has been interpreted as related to vari- ous taxa within Archosauria, including Ornithosuchidae, Rauisuchidae and Crocodylomorpha. Recent phylogenetic analyses are concordant in recovering it in a basal position within Suchia, and the most recent analysis recovered it within the clade Gracilisuchidae. Six specimens of G. stipanicicorum are known and all of them were studied and included in a phylogenetic analysis of Archosauriformes. Re-examination of the specimens allowed us to improve the diagnosis, identify new diagnostic characters (e.g. first sacral rib with a slight distal expansion relative to the proximal portion) and, in particular, redescribe the postcranial skeleton. The phylogenetic data matrix is an updated version of a previous study with the inclusion of additional characters and taxa. The strict consensus supports the most recent phylogenetic results, recovering Gracilisuchus as a basal suchian within Gracilisuchidae. The results of this analysis resolve some important polytomies and yield higher support values than recent analyses. All previous alternative hypotheses on the affinities of Gracilisuchus were found to be highly suboptimal for the new data matrix.
Fil: Lecuona, Agustina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; Argentina
Fil: Pol, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
description Gracilisuchus stipanicicorum Romer, 1972a, the only species in its genus, is a small basal suchian, recovered from the Middle?Late Triassic Chañares Formation (La Rioja, Argentina). This species has been interpreted as related to vari- ous taxa within Archosauria, including Ornithosuchidae, Rauisuchidae and Crocodylomorpha. Recent phylogenetic analyses are concordant in recovering it in a basal position within Suchia, and the most recent analysis recovered it within the clade Gracilisuchidae. Six specimens of G. stipanicicorum are known and all of them were studied and included in a phylogenetic analysis of Archosauriformes. Re-examination of the specimens allowed us to improve the diagnosis, identify new diagnostic characters (e.g. first sacral rib with a slight distal expansion relative to the proximal portion) and, in particular, redescribe the postcranial skeleton. The phylogenetic data matrix is an updated version of a previous study with the inclusion of additional characters and taxa. The strict consensus supports the most recent phylogenetic results, recovering Gracilisuchus as a basal suchian within Gracilisuchidae. The results of this analysis resolve some important polytomies and yield higher support values than recent analyses. All previous alternative hypotheses on the affinities of Gracilisuchus were found to be highly suboptimal for the new data matrix.
publishDate 2017
dc.date.none.fl_str_mv 2017-05
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/11336/41022
Lecuona, Agustina; Desojo, Julia Brenda; Pol, Diego; New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position; Wiley Blackwell Publishing, Inc; Zoological Journal of the Linnean Society; 181; 3; 5-2017; 1-40
0024-4082
CONICET Digital
CONICET
url http://hdl.handle.net/11336/41022
identifier_str_mv Lecuona, Agustina; Desojo, Julia Brenda; Pol, Diego; New information on the postcranial skeleton of Gracilisuchus stipanicicorum (Archosauria: Suchia) and reappraisal of its phylogenetic position; Wiley Blackwell Publishing, Inc; Zoological Journal of the Linnean Society; 181; 3; 5-2017; 1-40
0024-4082
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/zoolinnean/zlx011
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/zoolinnean/article-abstract/181/3/638/3854755
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
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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 12.993085

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