New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina
- Autores
- Ezcurra, Martin Daniel; Nesbitt, Sterling J.; Fiorelli, Lucas Ernesto; Desojo, Julia Brenda
- Año de publicación
- 2020
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The lower Carnian levels of the Chañares Formation (IschigualastoVilla Unión Basin, La Rioja Province) have yielded some of the most informative dinosaur precursor species known so far. However, these species are based on partial skeletons that in several cases hamper the comparison between them because of the absence of overlapping bones. This has generated a contentious debate during the last 20 years about the synonymy between two of these species, Lewisuchus admixtus and Pseudolagosuchus major. Here, we describe a new dinosauriform partial skeleton (CRILARPv 552) recently collected in the Chañares Formation that preserves previously unknown anatomical regions for the dinosaur precursors of this unit (e.g., premaxilla, inner ear, anterior zeugopodium) and allows comparisons with other dinosauriform specimens. CRILAR-Pv 552 is referred to Lewisuchus admixtus because it possesses a proportionally large skull, a laterally projected, shelf-like ridge on the jugal, and recurved, finely serrated middle–posterior maxillary and dentary teeth ankylosed to the bone, and the absence of a coracoid foramen. The new specimen preserves a dorsally bowed dentary with a lateroventral shelf that is identical to a dentary associated with the holotype of Lewisuchus admixtus. Additionally, the morphology of the new specimen is completely congruent with that of specimens of Pseudolagosuchus major, bolstering the hypothesis that the latter species is a subjective junior synonym of Lewisuchus admixtus. A preliminary phylogenetic analysis with updated scorings for Lewisuchus admixtus found this species at the base of Silesauridae. Anat Rec, 00:000–000, 2019.
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
Fil: Nesbitt, Sterling J.. Virginia Polytechnic Institute; Estados Unidos
Fil: Fiorelli, Lucas Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de Catamarca. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Secretaría de Industria y Minería. Servicio Geológico Minero Argentino. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Provincia de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja; Argentina
Fil: Desojo, Julia Brenda. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina - Materia
-
ARCHOSAURIA
DINOSAURIFORMES
ISCHIGUALASTO-VILLA UNIÓN BASIN
LATE TRIASSIC
LEWISUCHUS ADMIXTUS
PSEUDOLAGOSUCHUS MAJOR
SOUTH AMERICA - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/129047
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New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW ArgentinaEzcurra, Martin DanielNesbitt, Sterling J.Fiorelli, Lucas ErnestoDesojo, Julia BrendaARCHOSAURIADINOSAURIFORMESISCHIGUALASTO-VILLA UNIÓN BASINLATE TRIASSICLEWISUCHUS ADMIXTUSPSEUDOLAGOSUCHUS MAJORSOUTH AMERICAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The lower Carnian levels of the Chañares Formation (IschigualastoVilla Unión Basin, La Rioja Province) have yielded some of the most informative dinosaur precursor species known so far. However, these species are based on partial skeletons that in several cases hamper the comparison between them because of the absence of overlapping bones. This has generated a contentious debate during the last 20 years about the synonymy between two of these species, Lewisuchus admixtus and Pseudolagosuchus major. Here, we describe a new dinosauriform partial skeleton (CRILARPv 552) recently collected in the Chañares Formation that preserves previously unknown anatomical regions for the dinosaur precursors of this unit (e.g., premaxilla, inner ear, anterior zeugopodium) and allows comparisons with other dinosauriform specimens. CRILAR-Pv 552 is referred to Lewisuchus admixtus because it possesses a proportionally large skull, a laterally projected, shelf-like ridge on the jugal, and recurved, finely serrated middle–posterior maxillary and dentary teeth ankylosed to the bone, and the absence of a coracoid foramen. The new specimen preserves a dorsally bowed dentary with a lateroventral shelf that is identical to a dentary associated with the holotype of Lewisuchus admixtus. Additionally, the morphology of the new specimen is completely congruent with that of specimens of Pseudolagosuchus major, bolstering the hypothesis that the latter species is a subjective junior synonym of Lewisuchus admixtus. A preliminary phylogenetic analysis with updated scorings for Lewisuchus admixtus found this species at the base of Silesauridae. Anat Rec, 00:000–000, 2019.Fil: Ezcurra, Martin Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Nesbitt, Sterling J.. Virginia Polytechnic Institute; Estados UnidosFil: Fiorelli, Lucas Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de Catamarca. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Secretaría de Industria y Minería. Servicio Geológico Minero Argentino. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Provincia de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja; ArgentinaFil: Desojo, Julia Brenda. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaVeterinary and Human Toxicology2020-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/129047Ezcurra, Martin Daniel; Nesbitt, Sterling J.; Fiorelli, Lucas Ernesto; Desojo, Julia Brenda; New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina; Veterinary and Human Toxicology; Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology; 303; 5; 5-2020; 1393-14381932-8486CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/ar.24243info:eu-repo/semantics/altIdentifier/url/https://anatomypubs.onlinelibrary.wiley.com/doi/abs/10.1002/ar.24243info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:31:07Zoai:ri.conicet.gov.ar:11336/129047instacron: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:34982025-10-15 15:31:08.115CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina |
title |
New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina |
spellingShingle |
New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina Ezcurra, Martin Daniel ARCHOSAURIA DINOSAURIFORMES ISCHIGUALASTO-VILLA UNIÓN BASIN LATE TRIASSIC LEWISUCHUS ADMIXTUS PSEUDOLAGOSUCHUS MAJOR SOUTH AMERICA |
title_short |
New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina |
title_full |
New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina |
title_fullStr |
New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina |
title_full_unstemmed |
New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina |
title_sort |
New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina |
dc.creator.none.fl_str_mv |
Ezcurra, Martin Daniel Nesbitt, Sterling J. Fiorelli, Lucas Ernesto Desojo, Julia Brenda |
author |
Ezcurra, Martin Daniel |
author_facet |
Ezcurra, Martin Daniel Nesbitt, Sterling J. Fiorelli, Lucas Ernesto Desojo, Julia Brenda |
author_role |
author |
author2 |
Nesbitt, Sterling J. Fiorelli, Lucas Ernesto Desojo, Julia Brenda |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
ARCHOSAURIA DINOSAURIFORMES ISCHIGUALASTO-VILLA UNIÓN BASIN LATE TRIASSIC LEWISUCHUS ADMIXTUS PSEUDOLAGOSUCHUS MAJOR SOUTH AMERICA |
topic |
ARCHOSAURIA DINOSAURIFORMES ISCHIGUALASTO-VILLA UNIÓN BASIN LATE TRIASSIC LEWISUCHUS ADMIXTUS PSEUDOLAGOSUCHUS MAJOR SOUTH AMERICA |
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 lower Carnian levels of the Chañares Formation (IschigualastoVilla Unión Basin, La Rioja Province) have yielded some of the most informative dinosaur precursor species known so far. However, these species are based on partial skeletons that in several cases hamper the comparison between them because of the absence of overlapping bones. This has generated a contentious debate during the last 20 years about the synonymy between two of these species, Lewisuchus admixtus and Pseudolagosuchus major. Here, we describe a new dinosauriform partial skeleton (CRILARPv 552) recently collected in the Chañares Formation that preserves previously unknown anatomical regions for the dinosaur precursors of this unit (e.g., premaxilla, inner ear, anterior zeugopodium) and allows comparisons with other dinosauriform specimens. CRILAR-Pv 552 is referred to Lewisuchus admixtus because it possesses a proportionally large skull, a laterally projected, shelf-like ridge on the jugal, and recurved, finely serrated middle–posterior maxillary and dentary teeth ankylosed to the bone, and the absence of a coracoid foramen. The new specimen preserves a dorsally bowed dentary with a lateroventral shelf that is identical to a dentary associated with the holotype of Lewisuchus admixtus. Additionally, the morphology of the new specimen is completely congruent with that of specimens of Pseudolagosuchus major, bolstering the hypothesis that the latter species is a subjective junior synonym of Lewisuchus admixtus. A preliminary phylogenetic analysis with updated scorings for Lewisuchus admixtus found this species at the base of Silesauridae. Anat Rec, 00:000–000, 2019. 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 Fil: Nesbitt, Sterling J.. Virginia Polytechnic Institute; Estados Unidos Fil: Fiorelli, Lucas Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de Catamarca. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Secretaría de Industria y Minería. Servicio Geológico Minero Argentino. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Provincia de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja; Argentina Fil: Desojo, Julia Brenda. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina |
description |
The lower Carnian levels of the Chañares Formation (IschigualastoVilla Unión Basin, La Rioja Province) have yielded some of the most informative dinosaur precursor species known so far. However, these species are based on partial skeletons that in several cases hamper the comparison between them because of the absence of overlapping bones. This has generated a contentious debate during the last 20 years about the synonymy between two of these species, Lewisuchus admixtus and Pseudolagosuchus major. Here, we describe a new dinosauriform partial skeleton (CRILARPv 552) recently collected in the Chañares Formation that preserves previously unknown anatomical regions for the dinosaur precursors of this unit (e.g., premaxilla, inner ear, anterior zeugopodium) and allows comparisons with other dinosauriform specimens. CRILAR-Pv 552 is referred to Lewisuchus admixtus because it possesses a proportionally large skull, a laterally projected, shelf-like ridge on the jugal, and recurved, finely serrated middle–posterior maxillary and dentary teeth ankylosed to the bone, and the absence of a coracoid foramen. The new specimen preserves a dorsally bowed dentary with a lateroventral shelf that is identical to a dentary associated with the holotype of Lewisuchus admixtus. Additionally, the morphology of the new specimen is completely congruent with that of specimens of Pseudolagosuchus major, bolstering the hypothesis that the latter species is a subjective junior synonym of Lewisuchus admixtus. A preliminary phylogenetic analysis with updated scorings for Lewisuchus admixtus found this species at the base of Silesauridae. Anat Rec, 00:000–000, 2019. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-05 |
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/11336/129047 Ezcurra, Martin Daniel; Nesbitt, Sterling J.; Fiorelli, Lucas Ernesto; Desojo, Julia Brenda; New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina; Veterinary and Human Toxicology; Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology; 303; 5; 5-2020; 1393-1438 1932-8486 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/129047 |
identifier_str_mv |
Ezcurra, Martin Daniel; Nesbitt, Sterling J.; Fiorelli, Lucas Ernesto; Desojo, Julia Brenda; New specimen sheds light on the anatomy and taxonomy of the Early Late Triassic Dinosauriforms from the Chañares Formation, NW Argentina; Veterinary and Human Toxicology; Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology; 303; 5; 5-2020; 1393-1438 1932-8486 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ar.24243 info:eu-repo/semantics/altIdentifier/url/https://anatomypubs.onlinelibrary.wiley.com/doi/abs/10.1002/ar.24243 |
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.publisher.none.fl_str_mv |
Veterinary and Human Toxicology |
publisher.none.fl_str_mv |
Veterinary and Human Toxicology |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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1846083447829823488 |
score |
13.22299 |