A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana
- Autores
- Hsiou, Annie S.; Nydam, Randall L.; Simões, Tiago R.; Pretto, Flávio A.; Onary, Silvio; Martinelli, Agustín Guillermo; Liparini, Alexandre; Romo de Vivar Martínez, Paulo Rodrigo; Soares, Marina; Schultz, Cesar; Caldwell, Michael Wayne
- Año de publicación
- 2019
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The early evolution of lepidosaurs is marked by an extremely scarce fossil record during the Triassic. Importantly, most Triassic lepidosaur specimens are represented by disarticulated individuals from high energy accretion deposits in Laurasia, thus greatly hampering our understanding of the initial stages of lepidosaur evolution. Here, we describe the fragmentary remains of an associated skull and mandible of Clevosaurus hadroprodon sp. nov., a new taxon of sphenodontian lepidosaur from the Late Triassic (Carnian; 237–228 Mya) of Brazil. Referral to Sphenodontia is supported by the combined presence of a marginal dentition ankylosed to the apex of the dentary, maxilla, and premaxilla; the presence of ‘secondary bone’ at the bases of the marginal dentition; and a ventrally directed mental process at the symphysis of the dentary. Our phylogenetic analyses recover Clevosaurus hadroprodon as a clevosaurid, either in a polytomy with the Late Triassic to Early Jurassic Clevosaurus and Brachyrhinodon (under Bayesian inference), or nested among different species of Clevosaurus (under maximum parsimony). Clevosaurus hadroprodon represents the oldest known sphenodontian from Gondwana, and its clevosaurid relationships indicates that these sphenodontians achieved a widespread biogeographic distribution much earlier than previously thought.
Fil: Hsiou, Annie S.. Universidade de Sao Paulo; Brasil
Fil: Nydam, Randall L.. Midwestern University; Estados Unidos
Fil: Simões, Tiago R.. University of Alberta; Canadá. Harvard University; Estados Unidos
Fil: Pretto, Flávio A.. Universidade Federal de Santa Maria; Brasil
Fil: Onary, Silvio. Universidade de Sao Paulo; Brasil
Fil: Martinelli, Agustín Guillermo. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Liparini, Alexandre. Universidade Federal de Sergipe; Brasil
Fil: Romo de Vivar Martínez, Paulo Rodrigo. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Soares, Marina. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Caldwell, Michael Wayne. University of Alberta; Canadá - Materia
-
SPHENODONTIA
TRIASSIC
BRAZIL - 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:11336/124636
Ver los metadatos del registro completo
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A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in GondwanaHsiou, Annie S.Nydam, Randall L.Simões, Tiago R.Pretto, Flávio A.Onary, SilvioMartinelli, Agustín GuillermoLiparini, AlexandreRomo de Vivar Martínez, Paulo RodrigoSoares, MarinaSchultz, CesarCaldwell, Michael WayneSPHENODONTIATRIASSICBRAZILhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The early evolution of lepidosaurs is marked by an extremely scarce fossil record during the Triassic. Importantly, most Triassic lepidosaur specimens are represented by disarticulated individuals from high energy accretion deposits in Laurasia, thus greatly hampering our understanding of the initial stages of lepidosaur evolution. Here, we describe the fragmentary remains of an associated skull and mandible of Clevosaurus hadroprodon sp. nov., a new taxon of sphenodontian lepidosaur from the Late Triassic (Carnian; 237–228 Mya) of Brazil. Referral to Sphenodontia is supported by the combined presence of a marginal dentition ankylosed to the apex of the dentary, maxilla, and premaxilla; the presence of ‘secondary bone’ at the bases of the marginal dentition; and a ventrally directed mental process at the symphysis of the dentary. Our phylogenetic analyses recover Clevosaurus hadroprodon as a clevosaurid, either in a polytomy with the Late Triassic to Early Jurassic Clevosaurus and Brachyrhinodon (under Bayesian inference), or nested among different species of Clevosaurus (under maximum parsimony). Clevosaurus hadroprodon represents the oldest known sphenodontian from Gondwana, and its clevosaurid relationships indicates that these sphenodontians achieved a widespread biogeographic distribution much earlier than previously thought.Fil: Hsiou, Annie S.. Universidade de Sao Paulo; BrasilFil: Nydam, Randall L.. Midwestern University; Estados UnidosFil: Simões, Tiago R.. University of Alberta; Canadá. Harvard University; Estados UnidosFil: Pretto, Flávio A.. Universidade Federal de Santa Maria; BrasilFil: Onary, Silvio. Universidade de Sao Paulo; BrasilFil: Martinelli, Agustín Guillermo. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Liparini, Alexandre. Universidade Federal de Sergipe; BrasilFil: Romo de Vivar Martínez, Paulo Rodrigo. Universidade Federal do Rio Grande do Sul; BrasilFil: Soares, Marina. Universidade Federal do Rio Grande do Sul; BrasilFil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; BrasilFil: Caldwell, Michael Wayne. University of Alberta; CanadáNature Publishing Group2019-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/124636Hsiou, Annie S.; Nydam, Randall L.; Simões, Tiago R.; Pretto, Flávio A.; Onary, Silvio; et al.; A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana; Nature Publishing Group; Scientific Reports; 9; 1; 12-2019; 1-122045-2322CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/s41598-019-48297-9info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-019-48297-9info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:35:29Zoai:ri.conicet.gov.ar:11336/124636instacron: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:34982025-09-29 10:35:29.64CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana |
title |
A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana |
spellingShingle |
A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana Hsiou, Annie S. SPHENODONTIA TRIASSIC BRAZIL |
title_short |
A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana |
title_full |
A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana |
title_fullStr |
A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana |
title_full_unstemmed |
A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana |
title_sort |
A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana |
dc.creator.none.fl_str_mv |
Hsiou, Annie S. Nydam, Randall L. Simões, Tiago R. Pretto, Flávio A. Onary, Silvio Martinelli, Agustín Guillermo Liparini, Alexandre Romo de Vivar Martínez, Paulo Rodrigo Soares, Marina Schultz, Cesar Caldwell, Michael Wayne |
author |
Hsiou, Annie S. |
author_facet |
Hsiou, Annie S. Nydam, Randall L. Simões, Tiago R. Pretto, Flávio A. Onary, Silvio Martinelli, Agustín Guillermo Liparini, Alexandre Romo de Vivar Martínez, Paulo Rodrigo Soares, Marina Schultz, Cesar Caldwell, Michael Wayne |
author_role |
author |
author2 |
Nydam, Randall L. Simões, Tiago R. Pretto, Flávio A. Onary, Silvio Martinelli, Agustín Guillermo Liparini, Alexandre Romo de Vivar Martínez, Paulo Rodrigo Soares, Marina Schultz, Cesar Caldwell, Michael Wayne |
author2_role |
author author author author author author author author author author |
dc.subject.none.fl_str_mv |
SPHENODONTIA TRIASSIC BRAZIL |
topic |
SPHENODONTIA TRIASSIC BRAZIL |
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 early evolution of lepidosaurs is marked by an extremely scarce fossil record during the Triassic. Importantly, most Triassic lepidosaur specimens are represented by disarticulated individuals from high energy accretion deposits in Laurasia, thus greatly hampering our understanding of the initial stages of lepidosaur evolution. Here, we describe the fragmentary remains of an associated skull and mandible of Clevosaurus hadroprodon sp. nov., a new taxon of sphenodontian lepidosaur from the Late Triassic (Carnian; 237–228 Mya) of Brazil. Referral to Sphenodontia is supported by the combined presence of a marginal dentition ankylosed to the apex of the dentary, maxilla, and premaxilla; the presence of ‘secondary bone’ at the bases of the marginal dentition; and a ventrally directed mental process at the symphysis of the dentary. Our phylogenetic analyses recover Clevosaurus hadroprodon as a clevosaurid, either in a polytomy with the Late Triassic to Early Jurassic Clevosaurus and Brachyrhinodon (under Bayesian inference), or nested among different species of Clevosaurus (under maximum parsimony). Clevosaurus hadroprodon represents the oldest known sphenodontian from Gondwana, and its clevosaurid relationships indicates that these sphenodontians achieved a widespread biogeographic distribution much earlier than previously thought. Fil: Hsiou, Annie S.. Universidade de Sao Paulo; Brasil Fil: Nydam, Randall L.. Midwestern University; Estados Unidos Fil: Simões, Tiago R.. University of Alberta; Canadá. Harvard University; Estados Unidos Fil: Pretto, Flávio A.. Universidade Federal de Santa Maria; Brasil Fil: Onary, Silvio. Universidade de Sao Paulo; Brasil Fil: Martinelli, Agustín Guillermo. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina Fil: Liparini, Alexandre. Universidade Federal de Sergipe; Brasil Fil: Romo de Vivar Martínez, Paulo Rodrigo. Universidade Federal do Rio Grande do Sul; Brasil Fil: Soares, Marina. Universidade Federal do Rio Grande do Sul; Brasil Fil: Schultz, Cesar. Universidade Federal do Rio Grande do Sul; Brasil Fil: Caldwell, Michael Wayne. University of Alberta; Canadá |
description |
The early evolution of lepidosaurs is marked by an extremely scarce fossil record during the Triassic. Importantly, most Triassic lepidosaur specimens are represented by disarticulated individuals from high energy accretion deposits in Laurasia, thus greatly hampering our understanding of the initial stages of lepidosaur evolution. Here, we describe the fragmentary remains of an associated skull and mandible of Clevosaurus hadroprodon sp. nov., a new taxon of sphenodontian lepidosaur from the Late Triassic (Carnian; 237–228 Mya) of Brazil. Referral to Sphenodontia is supported by the combined presence of a marginal dentition ankylosed to the apex of the dentary, maxilla, and premaxilla; the presence of ‘secondary bone’ at the bases of the marginal dentition; and a ventrally directed mental process at the symphysis of the dentary. Our phylogenetic analyses recover Clevosaurus hadroprodon as a clevosaurid, either in a polytomy with the Late Triassic to Early Jurassic Clevosaurus and Brachyrhinodon (under Bayesian inference), or nested among different species of Clevosaurus (under maximum parsimony). Clevosaurus hadroprodon represents the oldest known sphenodontian from Gondwana, and its clevosaurid relationships indicates that these sphenodontians achieved a widespread biogeographic distribution much earlier than previously thought. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-12 |
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/11336/124636 Hsiou, Annie S.; Nydam, Randall L.; Simões, Tiago R.; Pretto, Flávio A.; Onary, Silvio; et al.; A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana; Nature Publishing Group; Scientific Reports; 9; 1; 12-2019; 1-12 2045-2322 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/124636 |
identifier_str_mv |
Hsiou, Annie S.; Nydam, Randall L.; Simões, Tiago R.; Pretto, Flávio A.; Onary, Silvio; et al.; A New Clevosaurid from the Triassic (Carnian) of Brazil and the Rise of Sphenodontians in Gondwana; Nature Publishing Group; Scientific Reports; 9; 1; 12-2019; 1-12 2045-2322 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/s41598-019-48297-9 info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-019-48297-9 |
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openAccess |
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application/pdf application/pdf application/pdf |
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Nature Publishing Group |
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Nature Publishing Group |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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