A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation

Autores
Ezcurra, Martin Daniel
Año de publicación
2021
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The vertebrate fossil record of the non-marine Upper Triassic Chinle Formation (southwest United States) is one of the richest worldwide for the Norian-Rhaetian stages. This unit includes one of the oldest neotheropods (Camposaurus arizonensis, Sonsela Member, ~219.5-218.4 Ma) and a mass accumulation of the best-known Triassic neotheropod (Coelophysis bauri, 'siltstone member', ~209-205 Ma). Here we revise three neotheropod associated partial postcrania from the middle portion of the Petrified Forest Member of the Chinle Formation, temporally intermediate between the latter occurrences (~212-210 Ma), including one found in 1982 (PEFO 21373/UCMP 129618), referred to Coelophysis bauri in 1986, but subsequently reinterpreted as Coelophysis sp. or a possible new taxon (the 'Padian theropod'). The other two specimens (PEFO 33981, PEFO 33983), found in 2004, were preliminarily referred to Coelophysis sp. or Coelophysidae. PEFO 21373/UCMP 129618 and PEFO 33983 possess a unique combination of character states that allows assigning both to a single, new species of neotheropod. The third specimen has a congruent morphology, but lacks preservation of key features, preventing an unambiguous referral to the new taxon. A phylogenetic analysis found the new taxon as one of the earliest branching coelophysoids, outside Coelophysidae (Coelophysis + Megapnosaurus +"Syntarsus"). When the three specimens are analysed as independent terminals, PEFO 33981 and (PEFO 21373/UCMP 129618 + PEFO 33983) are recovered as a paraphyletic group outside Coelophysidae. The new taxon provides key information for the optimization of character states at the base of Coelophysoidea and increases the richness of Triassic neotheropods.
Fil: Ezcurra, Martin Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
34º Jornadas Argentinas de Paleontología de Vertebrados
Mendoza
Argentina
Asociación Paleontológica Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales
Museo de Historia Natural de San Rafael
Museo de Ciencias Naturales y Antropológicas "Juan Cornelio Moyano"
Materia
Dinosauria
Theropoda
Phylogeny
Chinle Formation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/275814
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle FormationEzcurra, Martin DanielDinosauriaTheropodaPhylogenyChinle Formationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The vertebrate fossil record of the non-marine Upper Triassic Chinle Formation (southwest United States) is one of the richest worldwide for the Norian-Rhaetian stages. This unit includes one of the oldest neotheropods (Camposaurus arizonensis, Sonsela Member, ~219.5-218.4 Ma) and a mass accumulation of the best-known Triassic neotheropod (Coelophysis bauri, 'siltstone member', ~209-205 Ma). Here we revise three neotheropod associated partial postcrania from the middle portion of the Petrified Forest Member of the Chinle Formation, temporally intermediate between the latter occurrences (~212-210 Ma), including one found in 1982 (PEFO 21373/UCMP 129618), referred to Coelophysis bauri in 1986, but subsequently reinterpreted as Coelophysis sp. or a possible new taxon (the 'Padian theropod'). The other two specimens (PEFO 33981, PEFO 33983), found in 2004, were preliminarily referred to Coelophysis sp. or Coelophysidae. PEFO 21373/UCMP 129618 and PEFO 33983 possess a unique combination of character states that allows assigning both to a single, new species of neotheropod. The third specimen has a congruent morphology, but lacks preservation of key features, preventing an unambiguous referral to the new taxon. A phylogenetic analysis found the new taxon as one of the earliest branching coelophysoids, outside Coelophysidae (Coelophysis + Megapnosaurus +"Syntarsus"). When the three specimens are analysed as independent terminals, PEFO 33981 and (PEFO 21373/UCMP 129618 + PEFO 33983) are recovered as a paraphyletic group outside Coelophysidae. The new taxon provides key information for the optimization of character states at the base of Coelophysoidea and increases the richness of Triassic neotheropods.Fil: Ezcurra, Martin Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina34º Jornadas Argentinas de Paleontología de VertebradosMendozaArgentinaAsociación Paleontológica ArgentinaConsejo Nacional de Investigaciones Científicas y Técnicas. Instituto Argentino de Nivología, Glaciología y Ciencias AmbientalesMuseo de Historia Natural de San RafaelMuseo de Ciencias Naturales y Antropológicas "Juan Cornelio Moyano"Asociación Paleontológica Argentina2021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectJornadaJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/275814A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation; 34º Jornadas Argentinas de Paleontología de Vertebrados; Mendoza; Argentina; 2021; 16-162469-0228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://peapaleontologica.org.ar//index.php/peapa/article/view/394info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.08.06.2021.394Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-03T08:45:32Zoai:ri.conicet.gov.ar:11336/275814instacron: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:34982025-12-03 08:45:32.395CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation
title A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation
spellingShingle A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation
Ezcurra, Martin Daniel
Dinosauria
Theropoda
Phylogeny
Chinle Formation
title_short A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation
title_full A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation
title_fullStr A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation
title_full_unstemmed A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation
title_sort A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation
dc.creator.none.fl_str_mv Ezcurra, Martin Daniel
author Ezcurra, Martin Daniel
author_facet Ezcurra, Martin Daniel
author_role author
dc.subject.none.fl_str_mv Dinosauria
Theropoda
Phylogeny
Chinle Formation
topic Dinosauria
Theropoda
Phylogeny
Chinle Formation
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 vertebrate fossil record of the non-marine Upper Triassic Chinle Formation (southwest United States) is one of the richest worldwide for the Norian-Rhaetian stages. This unit includes one of the oldest neotheropods (Camposaurus arizonensis, Sonsela Member, ~219.5-218.4 Ma) and a mass accumulation of the best-known Triassic neotheropod (Coelophysis bauri, 'siltstone member', ~209-205 Ma). Here we revise three neotheropod associated partial postcrania from the middle portion of the Petrified Forest Member of the Chinle Formation, temporally intermediate between the latter occurrences (~212-210 Ma), including one found in 1982 (PEFO 21373/UCMP 129618), referred to Coelophysis bauri in 1986, but subsequently reinterpreted as Coelophysis sp. or a possible new taxon (the 'Padian theropod'). The other two specimens (PEFO 33981, PEFO 33983), found in 2004, were preliminarily referred to Coelophysis sp. or Coelophysidae. PEFO 21373/UCMP 129618 and PEFO 33983 possess a unique combination of character states that allows assigning both to a single, new species of neotheropod. The third specimen has a congruent morphology, but lacks preservation of key features, preventing an unambiguous referral to the new taxon. A phylogenetic analysis found the new taxon as one of the earliest branching coelophysoids, outside Coelophysidae (Coelophysis + Megapnosaurus +"Syntarsus"). When the three specimens are analysed as independent terminals, PEFO 33981 and (PEFO 21373/UCMP 129618 + PEFO 33983) are recovered as a paraphyletic group outside Coelophysidae. The new taxon provides key information for the optimization of character states at the base of Coelophysoidea and increases the richness of Triassic neotheropods.
Fil: Ezcurra, Martin Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
34º Jornadas Argentinas de Paleontología de Vertebrados
Mendoza
Argentina
Asociación Paleontológica Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales
Museo de Historia Natural de San Rafael
Museo de Ciencias Naturales y Antropológicas "Juan Cornelio Moyano"
description The vertebrate fossil record of the non-marine Upper Triassic Chinle Formation (southwest United States) is one of the richest worldwide for the Norian-Rhaetian stages. This unit includes one of the oldest neotheropods (Camposaurus arizonensis, Sonsela Member, ~219.5-218.4 Ma) and a mass accumulation of the best-known Triassic neotheropod (Coelophysis bauri, 'siltstone member', ~209-205 Ma). Here we revise three neotheropod associated partial postcrania from the middle portion of the Petrified Forest Member of the Chinle Formation, temporally intermediate between the latter occurrences (~212-210 Ma), including one found in 1982 (PEFO 21373/UCMP 129618), referred to Coelophysis bauri in 1986, but subsequently reinterpreted as Coelophysis sp. or a possible new taxon (the 'Padian theropod'). The other two specimens (PEFO 33981, PEFO 33983), found in 2004, were preliminarily referred to Coelophysis sp. or Coelophysidae. PEFO 21373/UCMP 129618 and PEFO 33983 possess a unique combination of character states that allows assigning both to a single, new species of neotheropod. The third specimen has a congruent morphology, but lacks preservation of key features, preventing an unambiguous referral to the new taxon. A phylogenetic analysis found the new taxon as one of the earliest branching coelophysoids, outside Coelophysidae (Coelophysis + Megapnosaurus +"Syntarsus"). When the three specimens are analysed as independent terminals, PEFO 33981 and (PEFO 21373/UCMP 129618 + PEFO 33983) are recovered as a paraphyletic group outside Coelophysidae. The new taxon provides key information for the optimization of character states at the base of Coelophysoidea and increases the richness of Triassic neotheropods.
publishDate 2021
dc.date.none.fl_str_mv 2021
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/11336/275814
A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation; 34º Jornadas Argentinas de Paleontología de Vertebrados; Mendoza; Argentina; 2021; 16-16
2469-0228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/275814
identifier_str_mv A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (USA), reveals a new species from the Upper Triassic Chinle Formation; 34º Jornadas Argentinas de Paleontología de Vertebrados; Mendoza; Argentina; 2021; 16-16
2469-0228
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://peapaleontologica.org.ar//index.php/peapa/article/view/394
info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.08.06.2021.394
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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