Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs

Autores
Neto, Voltaire Dutra Paes; Desojo, Julia Brenda; Biacchi Brust, Ana Carolina; Ribeiro, Ana Maria; Schultz, Cesar Leandro; Soares, Marina Bento
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aetosauroides scagliai, from the Ischigualasto Formation of Argentina and Santa Maria Supersequence of Brazil (Carnian-Norian), is one of the oldest members of Aetosauria, a diverse clade of armored crocodile-line archosaurs. Aetosauroides scagliai differs from other aetosaurs in having the maxilla excluded from the margin of the external nares, the length/width ratio of the postzygapophyses ≤ 0.75, and other features that place it as one of the earliest-diverging members of the clade. In this paper we provide a detailed description of the skull of A. scagliai based on a new Brazilian specimen, revealing that it lacks a pneumatic cavity on the medial surface of the maxilla and further differs from all other known aetosaurs by the presence of ≥ 12 dentary teeth. However, contra previous studies, the elongated posterior process of the jugal does articulate ventrally with the quadratojugal in A. scagliai, forming the posteroventral corner of the skull as in all other aetosaurs. Aetosauroides scagliai exhibits some characters typical of predatory archosaurs (like the recurved ziphodont teeth and mandibular articulation at the level of the tooth row), but was probably an omnivore, as it also shares several probable adaptations for herbivory with aetosaurs generally (i.e., edentulous anterior premaxilla and dentary) and stagonolepidoids specifically (e.g., shovel-shaped snout). This suggests that there was greater trophic diversity in this clade than usually recognized, at least early in their evolutionary history.
Fil: Neto, Voltaire Dutra Paes. Programa de Pós-Graduação em Geociências; Brasil
Fil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Fil: Biacchi Brust, Ana Carolina. Centro de Estudos e Pesquisas em Direito e Internet; Brasil
Fil: Ribeiro, Ana Maria. Museu de Ciências Naturais do Rio Grande do Sul; Brasil
Fil: Schultz, Cesar Leandro. Programa de Pós-Graduação em Geociências; Brasil
Fil: Soares, Marina Bento. Universidade Federal do Rio de Janeiro; Brasil
Materia
CRANIAL OSTEOLOGY
GONDWANA
PALEOECOLOGY
REPTILIA
TEETH
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:11336/164443
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/164443
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaursNeto, Voltaire Dutra PaesDesojo, Julia BrendaBiacchi Brust, Ana CarolinaRibeiro, Ana MariaSchultz, Cesar LeandroSoares, Marina BentoCRANIAL OSTEOLOGYGONDWANAPALEOECOLOGYREPTILIATEETHhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Aetosauroides scagliai, from the Ischigualasto Formation of Argentina and Santa Maria Supersequence of Brazil (Carnian-Norian), is one of the oldest members of Aetosauria, a diverse clade of armored crocodile-line archosaurs. Aetosauroides scagliai differs from other aetosaurs in having the maxilla excluded from the margin of the external nares, the length/width ratio of the postzygapophyses ≤ 0.75, and other features that place it as one of the earliest-diverging members of the clade. In this paper we provide a detailed description of the skull of A. scagliai based on a new Brazilian specimen, revealing that it lacks a pneumatic cavity on the medial surface of the maxilla and further differs from all other known aetosaurs by the presence of ≥ 12 dentary teeth. However, contra previous studies, the elongated posterior process of the jugal does articulate ventrally with the quadratojugal in A. scagliai, forming the posteroventral corner of the skull as in all other aetosaurs. Aetosauroides scagliai exhibits some characters typical of predatory archosaurs (like the recurved ziphodont teeth and mandibular articulation at the level of the tooth row), but was probably an omnivore, as it also shares several probable adaptations for herbivory with aetosaurs generally (i.e., edentulous anterior premaxilla and dentary) and stagonolepidoids specifically (e.g., shovel-shaped snout). This suggests that there was greater trophic diversity in this clade than usually recognized, at least early in their evolutionary history.Fil: Neto, Voltaire Dutra Paes. Programa de Pós-Graduação em Geociências; BrasilFil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; ArgentinaFil: Biacchi Brust, Ana Carolina. Centro de Estudos e Pesquisas em Direito e Internet; BrasilFil: Ribeiro, Ana Maria. Museu de Ciências Naturais do Rio Grande do Sul; BrasilFil: Schultz, Cesar Leandro. Programa de Pós-Graduação em Geociências; BrasilFil: Soares, Marina Bento. Universidade Federal do Rio de Janeiro; BrasilCoquina Press2021-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/164443Neto, Voltaire Dutra Paes; Desojo, Julia Brenda; Biacchi Brust, Ana Carolina; Ribeiro, Ana Maria; Schultz, Cesar Leandro; et al.; Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs; Coquina Press; Palaeontologia Electronica; 24; 3; 11-2021; 1-511094-80741532-3056CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.26879/1120info:eu-repo/semantics/altIdentifier/url/https://palaeo-electronica.org/content/2021/3463-aetosauroides-skullinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:50:04Zoai:ri.conicet.gov.ar:11336/164443instacron: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 14:50:04.496CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs
title Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs
spellingShingle Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs
Neto, Voltaire Dutra Paes
CRANIAL OSTEOLOGY
GONDWANA
PALEOECOLOGY
REPTILIA
TEETH
title_short Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs
title_full Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs
title_fullStr Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs
title_full_unstemmed Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs
title_sort Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs
dc.creator.none.fl_str_mv Neto, Voltaire Dutra Paes
Desojo, Julia Brenda
Biacchi Brust, Ana Carolina
Ribeiro, Ana Maria
Schultz, Cesar Leandro
Soares, Marina Bento
author Neto, Voltaire Dutra Paes
author_facet Neto, Voltaire Dutra Paes
Desojo, Julia Brenda
Biacchi Brust, Ana Carolina
Ribeiro, Ana Maria
Schultz, Cesar Leandro
Soares, Marina Bento
author_role author
author2 Desojo, Julia Brenda
Biacchi Brust, Ana Carolina
Ribeiro, Ana Maria
Schultz, Cesar Leandro
Soares, Marina Bento
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv CRANIAL OSTEOLOGY
GONDWANA
PALEOECOLOGY
REPTILIA
TEETH
topic CRANIAL OSTEOLOGY
GONDWANA
PALEOECOLOGY
REPTILIA
TEETH
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Aetosauroides scagliai, from the Ischigualasto Formation of Argentina and Santa Maria Supersequence of Brazil (Carnian-Norian), is one of the oldest members of Aetosauria, a diverse clade of armored crocodile-line archosaurs. Aetosauroides scagliai differs from other aetosaurs in having the maxilla excluded from the margin of the external nares, the length/width ratio of the postzygapophyses ≤ 0.75, and other features that place it as one of the earliest-diverging members of the clade. In this paper we provide a detailed description of the skull of A. scagliai based on a new Brazilian specimen, revealing that it lacks a pneumatic cavity on the medial surface of the maxilla and further differs from all other known aetosaurs by the presence of ≥ 12 dentary teeth. However, contra previous studies, the elongated posterior process of the jugal does articulate ventrally with the quadratojugal in A. scagliai, forming the posteroventral corner of the skull as in all other aetosaurs. Aetosauroides scagliai exhibits some characters typical of predatory archosaurs (like the recurved ziphodont teeth and mandibular articulation at the level of the tooth row), but was probably an omnivore, as it also shares several probable adaptations for herbivory with aetosaurs generally (i.e., edentulous anterior premaxilla and dentary) and stagonolepidoids specifically (e.g., shovel-shaped snout). This suggests that there was greater trophic diversity in this clade than usually recognized, at least early in their evolutionary history.
Fil: Neto, Voltaire Dutra Paes. Programa de Pós-Graduação em Geociências; Brasil
Fil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Fil: Biacchi Brust, Ana Carolina. Centro de Estudos e Pesquisas em Direito e Internet; Brasil
Fil: Ribeiro, Ana Maria. Museu de Ciências Naturais do Rio Grande do Sul; Brasil
Fil: Schultz, Cesar Leandro. Programa de Pós-Graduação em Geociências; Brasil
Fil: Soares, Marina Bento. Universidade Federal do Rio de Janeiro; Brasil
description Aetosauroides scagliai, from the Ischigualasto Formation of Argentina and Santa Maria Supersequence of Brazil (Carnian-Norian), is one of the oldest members of Aetosauria, a diverse clade of armored crocodile-line archosaurs. Aetosauroides scagliai differs from other aetosaurs in having the maxilla excluded from the margin of the external nares, the length/width ratio of the postzygapophyses ≤ 0.75, and other features that place it as one of the earliest-diverging members of the clade. In this paper we provide a detailed description of the skull of A. scagliai based on a new Brazilian specimen, revealing that it lacks a pneumatic cavity on the medial surface of the maxilla and further differs from all other known aetosaurs by the presence of ≥ 12 dentary teeth. However, contra previous studies, the elongated posterior process of the jugal does articulate ventrally with the quadratojugal in A. scagliai, forming the posteroventral corner of the skull as in all other aetosaurs. Aetosauroides scagliai exhibits some characters typical of predatory archosaurs (like the recurved ziphodont teeth and mandibular articulation at the level of the tooth row), but was probably an omnivore, as it also shares several probable adaptations for herbivory with aetosaurs generally (i.e., edentulous anterior premaxilla and dentary) and stagonolepidoids specifically (e.g., shovel-shaped snout). This suggests that there was greater trophic diversity in this clade than usually recognized, at least early in their evolutionary history.
publishDate 2021
dc.date.none.fl_str_mv 2021-11
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/11336/164443
Neto, Voltaire Dutra Paes; Desojo, Julia Brenda; Biacchi Brust, Ana Carolina; Ribeiro, Ana Maria; Schultz, Cesar Leandro; et al.; Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs; Coquina Press; Palaeontologia Electronica; 24; 3; 11-2021; 1-51
1094-8074
1532-3056
CONICET Digital
CONICET
url http://hdl.handle.net/11336/164443
identifier_str_mv Neto, Voltaire Dutra Paes; Desojo, Julia Brenda; Biacchi Brust, Ana Carolina; Ribeiro, Ana Maria; Schultz, Cesar Leandro; et al.; Skull osteology of aetosauroides scagliai casamiquela, 1960 (archosauria: Aetosauria) from the late triassic of Brazil: New insights into the paleobiology of aetosaurs; Coquina Press; Palaeontologia Electronica; 24; 3; 11-2021; 1-51
1094-8074
1532-3056
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.26879/1120
info:eu-repo/semantics/altIdentifier/url/https://palaeo-electronica.org/content/2021/3463-aetosauroides-skull
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 Coquina Press
publisher.none.fl_str_mv Coquina Press
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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