Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil

Autores
Paes Neto, Voltaire; Desojo, Julia Brenda; Biacchi Brust, Ana Carolina; Schultz, Cesar; Da Rosa, Atila Augusto Stock; Soares, Marina
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aetosauria represents a remarkable clade of armored pseudosuchians in which some of its oldest members are recovered from late Carnian units of Brazil. Three species are known: The mid-sized aetosaur Aetosauroides scagliai, which also occurs in Argentina, and two small-sized species, Aetobarbakinoides brasiliensis and Polesinesuchus aurelioi. We provide a detailed description and comparative analysis of the axial skeleton of Aetosauroides, identifying some diagnostic features as variable. These include the deep pocket pit lateral to the base of the neural spine, the presence of the infradiapophyseal laminae and the lateral fossa ventral to the neurocentral suture. These features are not found in smaller and immature Aetosauroides specimens, resembling the condition found in Polesinesuchus, which is based solely on a juvenile individual, as revealed by osteoderm microstructure analysis. As Polesinesuchus cannot be anatomically differentiated from other small individuals of Aetosauroides, we propose it as a junior synonym of Aetosauroides scagliai. Our results shrink the number of putative ‘dwarf’ aetosaurs, indicating that morphological variation related to ontogeny affects aetosaur taxonomy and phylogeny.
Fil: Paes Neto, Voltaire. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Biacchi Brust, Ana Carolina. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Da Rosa, Atila Augusto Stock. Universidade Federal de Santa Maria; Brasil
Fil: Soares, Marina. Universidade Federal do Rio de Janeiro; Brasil
Materia
GROWTH SERIES
JUVENILE
ONTOGENY
OSTEOHISTOLOGY
PSEUDOSUCHIA
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:11336/150258
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/150258
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of BrazilPaes Neto, VoltaireDesojo, Julia BrendaBiacchi Brust, Ana CarolinaSchultz, CesarDa Rosa, Atila Augusto StockSoares, MarinaGROWTH SERIESJUVENILEONTOGENYOSTEOHISTOLOGYPSEUDOSUCHIAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Aetosauria represents a remarkable clade of armored pseudosuchians in which some of its oldest members are recovered from late Carnian units of Brazil. Three species are known: The mid-sized aetosaur Aetosauroides scagliai, which also occurs in Argentina, and two small-sized species, Aetobarbakinoides brasiliensis and Polesinesuchus aurelioi. We provide a detailed description and comparative analysis of the axial skeleton of Aetosauroides, identifying some diagnostic features as variable. These include the deep pocket pit lateral to the base of the neural spine, the presence of the infradiapophyseal laminae and the lateral fossa ventral to the neurocentral suture. These features are not found in smaller and immature Aetosauroides specimens, resembling the condition found in Polesinesuchus, which is based solely on a juvenile individual, as revealed by osteoderm microstructure analysis. As Polesinesuchus cannot be anatomically differentiated from other small individuals of Aetosauroides, we propose it as a junior synonym of Aetosauroides scagliai. Our results shrink the number of putative ‘dwarf’ aetosaurs, indicating that morphological variation related to ontogeny affects aetosaur taxonomy and phylogeny.Fil: Paes Neto, Voltaire. Universidade Federal do Rio Grande do Sul; BrasilFil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Biacchi Brust, Ana Carolina. Universidade Federal do Rio Grande do Sul; BrasilFil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; BrasilFil: Da Rosa, Atila Augusto Stock. Universidade Federal de Santa Maria; BrasilFil: Soares, Marina. Universidade Federal do Rio de Janeiro; BrasilAcademia Brasileira de Ciencias2021-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/150258Paes Neto, Voltaire; Desojo, Julia Brenda; Biacchi Brust, Ana Carolina; Schultz, Cesar; Da Rosa, Atila Augusto Stock; et al.; Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil; Academia Brasileira de Ciencias; Anais da Academia Brasileira de Ciencias; 93; 2; 11-2021; 1-360001-37651678-2690CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1590/0001-3765202120201239info:eu-repo/semantics/altIdentifier/url/https://www.scielo.br/j/aabc/a/5gjfMGTnHmpHwnWzCYddCbB/?lang=eninfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T10:36:13Zoai:ri.conicet.gov.ar:11336/150258instacron: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:34982025-11-05 10:36:13.887CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil
title Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil
spellingShingle Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil
Paes Neto, Voltaire
GROWTH SERIES
JUVENILE
ONTOGENY
OSTEOHISTOLOGY
PSEUDOSUCHIA
title_short Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil
title_full Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil
title_fullStr Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil
title_full_unstemmed Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil
title_sort Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil
dc.creator.none.fl_str_mv Paes Neto, Voltaire
Desojo, Julia Brenda
Biacchi Brust, Ana Carolina
Schultz, Cesar
Da Rosa, Atila Augusto Stock
Soares, Marina
author Paes Neto, Voltaire
author_facet Paes Neto, Voltaire
Desojo, Julia Brenda
Biacchi Brust, Ana Carolina
Schultz, Cesar
Da Rosa, Atila Augusto Stock
Soares, Marina
author_role author
author2 Desojo, Julia Brenda
Biacchi Brust, Ana Carolina
Schultz, Cesar
Da Rosa, Atila Augusto Stock
Soares, Marina
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv GROWTH SERIES
JUVENILE
ONTOGENY
OSTEOHISTOLOGY
PSEUDOSUCHIA
topic GROWTH SERIES
JUVENILE
ONTOGENY
OSTEOHISTOLOGY
PSEUDOSUCHIA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Aetosauria represents a remarkable clade of armored pseudosuchians in which some of its oldest members are recovered from late Carnian units of Brazil. Three species are known: The mid-sized aetosaur Aetosauroides scagliai, which also occurs in Argentina, and two small-sized species, Aetobarbakinoides brasiliensis and Polesinesuchus aurelioi. We provide a detailed description and comparative analysis of the axial skeleton of Aetosauroides, identifying some diagnostic features as variable. These include the deep pocket pit lateral to the base of the neural spine, the presence of the infradiapophyseal laminae and the lateral fossa ventral to the neurocentral suture. These features are not found in smaller and immature Aetosauroides specimens, resembling the condition found in Polesinesuchus, which is based solely on a juvenile individual, as revealed by osteoderm microstructure analysis. As Polesinesuchus cannot be anatomically differentiated from other small individuals of Aetosauroides, we propose it as a junior synonym of Aetosauroides scagliai. Our results shrink the number of putative ‘dwarf’ aetosaurs, indicating that morphological variation related to ontogeny affects aetosaur taxonomy and phylogeny.
Fil: Paes Neto, Voltaire. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Biacchi Brust, Ana Carolina. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Da Rosa, Atila Augusto Stock. Universidade Federal de Santa Maria; Brasil
Fil: Soares, Marina. Universidade Federal do Rio de Janeiro; Brasil
description Aetosauria represents a remarkable clade of armored pseudosuchians in which some of its oldest members are recovered from late Carnian units of Brazil. Three species are known: The mid-sized aetosaur Aetosauroides scagliai, which also occurs in Argentina, and two small-sized species, Aetobarbakinoides brasiliensis and Polesinesuchus aurelioi. We provide a detailed description and comparative analysis of the axial skeleton of Aetosauroides, identifying some diagnostic features as variable. These include the deep pocket pit lateral to the base of the neural spine, the presence of the infradiapophyseal laminae and the lateral fossa ventral to the neurocentral suture. These features are not found in smaller and immature Aetosauroides specimens, resembling the condition found in Polesinesuchus, which is based solely on a juvenile individual, as revealed by osteoderm microstructure analysis. As Polesinesuchus cannot be anatomically differentiated from other small individuals of Aetosauroides, we propose it as a junior synonym of Aetosauroides scagliai. Our results shrink the number of putative ‘dwarf’ aetosaurs, indicating that morphological variation related to ontogeny affects aetosaur taxonomy and phylogeny.
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/11336/150258
Paes Neto, Voltaire; Desojo, Julia Brenda; Biacchi Brust, Ana Carolina; Schultz, Cesar; Da Rosa, Atila Augusto Stock; et al.; Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil; Academia Brasileira de Ciencias; Anais da Academia Brasileira de Ciencias; 93; 2; 11-2021; 1-36
0001-3765
1678-2690
CONICET Digital
CONICET
url http://hdl.handle.net/11336/150258
identifier_str_mv Paes Neto, Voltaire; Desojo, Julia Brenda; Biacchi Brust, Ana Carolina; Schultz, Cesar; Da Rosa, Atila Augusto Stock; et al.; Intraspecific variation in the axial skeleton of Aetosauroides scagliai (Archosauria: Aetosauria) and its implications for the aetosaur diversity of the Late Triassic of Brazil; Academia Brasileira de Ciencias; Anais da Academia Brasileira de Ciencias; 93; 2; 11-2021; 1-36
0001-3765
1678-2690
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1590/0001-3765202120201239
info:eu-repo/semantics/altIdentifier/url/https://www.scielo.br/j/aabc/a/5gjfMGTnHmpHwnWzCYddCbB/?lang=en
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
dc.publisher.none.fl_str_mv Academia Brasileira de Ciencias
publisher.none.fl_str_mv Academia Brasileira de Ciencias
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 13.087074

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