Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae

Autores
Leardi, Juan Martín
Año de publicación
2010
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The objective of the present contribution is to restudy the forelimb anatomy of basal crurotarsals and to evaluate the phylogenetic information of this anatomical region. The position of Ornithosuchidae is one of the topics of particular interest, given the ongoing debate about the affinities of this clade of Triassic archosaurs. This clade of basal archosaurs was originally depicted as the sister group of the Ornithodira, but recent studies agreed on its crurotarsal affinities, depicting it either as a basal member of this clade or as the sister group of the rauisuchians within Suchia. This last hypothesis is supported by forelimb characters in this study, particularly by synapomorphies shared with some members of the Rauisuchia, such as: a deep groove ventral to the glenoid; presence of an ectepicondylar groove; and the pressence of an ossified intermedium. Most of these traits are only shared with Postosuchus and Batrachostomus, because of the lack of complete forelimb material in other rauisuchians. Other analyzed forelimb characters have a broader distribution within Archosauria, such as the presence of an ossified olecranon process on the ulna, being a synapomorphy of Archosauria; the structure of the medial tuberosity, that forms a distinctive separate structure from the medial margin of the humeral head in most crurotarsals (being this condition strongly developed in Riojasuchus). Finally, this preliminary study shows the phylogenetic informativeness of the forelimb in basal archosaurians, which provides valuable information that has been previously unexplored.
Fil: Leardi, Juan Martín. 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. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología; Argentina
XXV Jornadas Argentinas de Paleontología de Vertebrados
Argentina
Asociación Paleontológica Argentina
Materia
Archosauria
Crurotarsi
Phylogeny
Forelimb
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:11336/280924
Acceder
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spelling Forelimb information on basal crurotarsal phylogeny and the position of OrnithosuchidaeLeardi, Juan MartínArchosauriaCrurotarsiPhylogenyForelimbhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The objective of the present contribution is to restudy the forelimb anatomy of basal crurotarsals and to evaluate the phylogenetic information of this anatomical region. The position of Ornithosuchidae is one of the topics of particular interest, given the ongoing debate about the affinities of this clade of Triassic archosaurs. This clade of basal archosaurs was originally depicted as the sister group of the Ornithodira, but recent studies agreed on its crurotarsal affinities, depicting it either as a basal member of this clade or as the sister group of the rauisuchians within Suchia. This last hypothesis is supported by forelimb characters in this study, particularly by synapomorphies shared with some members of the Rauisuchia, such as: a deep groove ventral to the glenoid; presence of an ectepicondylar groove; and the pressence of an ossified intermedium. Most of these traits are only shared with Postosuchus and Batrachostomus, because of the lack of complete forelimb material in other rauisuchians. Other analyzed forelimb characters have a broader distribution within Archosauria, such as the presence of an ossified olecranon process on the ulna, being a synapomorphy of Archosauria; the structure of the medial tuberosity, that forms a distinctive separate structure from the medial margin of the humeral head in most crurotarsals (being this condition strongly developed in Riojasuchus). Finally, this preliminary study shows the phylogenetic informativeness of the forelimb in basal archosaurians, which provides valuable information that has been previously unexplored.Fil: Leardi, Juan Martín. 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. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología; ArgentinaXXV Jornadas Argentinas de Paleontología de VertebradosArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2010info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectJornadaJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/280924Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae; XXV Jornadas Argentinas de Paleontología de Vertebrados; Argentina; 2010; 15-15CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/475Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-26T10:08:20Zoai:ri.conicet.gov.ar:11336/280924instacron: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:34982026-02-26 10:08:20.994CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae
title Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae
spellingShingle Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae
Leardi, Juan Martín
Archosauria
Crurotarsi
Phylogeny
Forelimb
title_short Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae
title_full Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae
title_fullStr Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae
title_full_unstemmed Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae
title_sort Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae
dc.creator.none.fl_str_mv Leardi, Juan Martín
author Leardi, Juan Martín
author_facet Leardi, Juan Martín
author_role author
dc.subject.none.fl_str_mv Archosauria
Crurotarsi
Phylogeny
Forelimb
topic Archosauria
Crurotarsi
Phylogeny
Forelimb
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The objective of the present contribution is to restudy the forelimb anatomy of basal crurotarsals and to evaluate the phylogenetic information of this anatomical region. The position of Ornithosuchidae is one of the topics of particular interest, given the ongoing debate about the affinities of this clade of Triassic archosaurs. This clade of basal archosaurs was originally depicted as the sister group of the Ornithodira, but recent studies agreed on its crurotarsal affinities, depicting it either as a basal member of this clade or as the sister group of the rauisuchians within Suchia. This last hypothesis is supported by forelimb characters in this study, particularly by synapomorphies shared with some members of the Rauisuchia, such as: a deep groove ventral to the glenoid; presence of an ectepicondylar groove; and the pressence of an ossified intermedium. Most of these traits are only shared with Postosuchus and Batrachostomus, because of the lack of complete forelimb material in other rauisuchians. Other analyzed forelimb characters have a broader distribution within Archosauria, such as the presence of an ossified olecranon process on the ulna, being a synapomorphy of Archosauria; the structure of the medial tuberosity, that forms a distinctive separate structure from the medial margin of the humeral head in most crurotarsals (being this condition strongly developed in Riojasuchus). Finally, this preliminary study shows the phylogenetic informativeness of the forelimb in basal archosaurians, which provides valuable information that has been previously unexplored.
Fil: Leardi, Juan Martín. 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. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología; Argentina
XXV Jornadas Argentinas de Paleontología de Vertebrados
Argentina
Asociación Paleontológica Argentina
description The objective of the present contribution is to restudy the forelimb anatomy of basal crurotarsals and to evaluate the phylogenetic information of this anatomical region. The position of Ornithosuchidae is one of the topics of particular interest, given the ongoing debate about the affinities of this clade of Triassic archosaurs. This clade of basal archosaurs was originally depicted as the sister group of the Ornithodira, but recent studies agreed on its crurotarsal affinities, depicting it either as a basal member of this clade or as the sister group of the rauisuchians within Suchia. This last hypothesis is supported by forelimb characters in this study, particularly by synapomorphies shared with some members of the Rauisuchia, such as: a deep groove ventral to the glenoid; presence of an ectepicondylar groove; and the pressence of an ossified intermedium. Most of these traits are only shared with Postosuchus and Batrachostomus, because of the lack of complete forelimb material in other rauisuchians. Other analyzed forelimb characters have a broader distribution within Archosauria, such as the presence of an ossified olecranon process on the ulna, being a synapomorphy of Archosauria; the structure of the medial tuberosity, that forms a distinctive separate structure from the medial margin of the humeral head in most crurotarsals (being this condition strongly developed in Riojasuchus). Finally, this preliminary study shows the phylogenetic informativeness of the forelimb in basal archosaurians, which provides valuable information that has been previously unexplored.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/11336/280924
Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae; XXV Jornadas Argentinas de Paleontología de Vertebrados; Argentina; 2010; 15-15
CONICET Digital
CONICET
url http://hdl.handle.net/11336/280924
identifier_str_mv Forelimb information on basal crurotarsal phylogeny and the position of Ornithosuchidae; XXV Jornadas Argentinas de Paleontología de Vertebrados; Argentina; 2010; 15-15
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/article/view/475
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 Nacional
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)
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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