New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles

Autores
Novas, Fernando Emilio; Agnolin, Federico; Lio, Gabriel L.; Rozadilla, Sebastian; Suárez, Manuel; de la Cruz, Rita; de Souza Carvalho, Ismar; Rubilar Rogers, David; Isasi, Marcelo Pablo
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We describe the basal mesoeucrocodylian Burkesuchus mallingrandensis nov. gen. et sp., from the Upper Jurassic (Tithonian) Toqui Formation of southern Chile. The new taxon constitutes one of the few records of non-pelagic Jurassic crocodyliforms for the entire South American continent. Burkesuchus was found on the same levels that yielded titanosauriform and diplodocoid sauropods and the herbivore theropod Chilesaurus diegosuarezi, thus expanding the taxonomic composition of currently poorly known Jurassic reptilian faunas from Patagonia. Burkesuchus was a small-sized crocodyliform (estimated length 70 cm), with a cranium that is dorsoventrally depressed and transversely wide posteriorly and distinguished by a posteroventrally flexed wing-like squamosal. A well-defined longitudinal groove runs along the lateral edge of the postorbital and squamosal, indicative of a anteroposteriorly extensive upper earlid. Phylogenetic analysis supports Burkesuchus as a basal member of Mesoeucrocodylia. This new discovery expands the meagre record of non-pelagic representatives of this clade for the Jurassic Period, and together with Batrachomimus, from Upper Jurassic beds of Brazil, supports the idea that South America represented a cradle for the evolution of derived crocodyliforms during the Late Jurassic.
Fil: Novas, Fernando Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Agnolin, Federico. Universidad Maimónides; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Lio, Gabriel L.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Rozadilla, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Suárez, Manuel. Universidad Andrés Bello; Chile
Fil: de la Cruz, Rita. Servicio Nacional de Geologia y Mineria (SERNAGEOMIN); Chile
Fil: de Souza Carvalho, Ismar. Universidade Federal do Rio de Janeiro; Brasil. Universidad de Coimbra; Portugal
Fil: Rubilar Rogers, David. Museo Nacional de Historia Natural Chile; Chile
Fil: Isasi, Marcelo Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Materia
Crocodyliformes
Jurassic
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:11336/170432
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodilesNovas, Fernando EmilioAgnolin, FedericoLio, Gabriel L.Rozadilla, SebastianSuárez, Manuelde la Cruz, Ritade Souza Carvalho, IsmarRubilar Rogers, DavidIsasi, Marcelo PabloCrocodyliformesJurassichttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We describe the basal mesoeucrocodylian Burkesuchus mallingrandensis nov. gen. et sp., from the Upper Jurassic (Tithonian) Toqui Formation of southern Chile. The new taxon constitutes one of the few records of non-pelagic Jurassic crocodyliforms for the entire South American continent. Burkesuchus was found on the same levels that yielded titanosauriform and diplodocoid sauropods and the herbivore theropod Chilesaurus diegosuarezi, thus expanding the taxonomic composition of currently poorly known Jurassic reptilian faunas from Patagonia. Burkesuchus was a small-sized crocodyliform (estimated length 70 cm), with a cranium that is dorsoventrally depressed and transversely wide posteriorly and distinguished by a posteroventrally flexed wing-like squamosal. A well-defined longitudinal groove runs along the lateral edge of the postorbital and squamosal, indicative of a anteroposteriorly extensive upper earlid. Phylogenetic analysis supports Burkesuchus as a basal member of Mesoeucrocodylia. This new discovery expands the meagre record of non-pelagic representatives of this clade for the Jurassic Period, and together with Batrachomimus, from Upper Jurassic beds of Brazil, supports the idea that South America represented a cradle for the evolution of derived crocodyliforms during the Late Jurassic.Fil: Novas, Fernando Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Agnolin, Federico. Universidad Maimónides; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Lio, Gabriel L.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Rozadilla, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Suárez, Manuel. Universidad Andrés Bello; ChileFil: de la Cruz, Rita. Servicio Nacional de Geologia y Mineria (SERNAGEOMIN); ChileFil: de Souza Carvalho, Ismar. Universidade Federal do Rio de Janeiro; Brasil. Universidad de Coimbra; PortugalFil: Rubilar Rogers, David. Museo Nacional de Historia Natural Chile; ChileFil: Isasi, Marcelo Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaNature Publishing Group2021-12info: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/11336/170432Novas, Fernando Emilio; Agnolin, Federico; Lio, Gabriel L.; Rozadilla, Sebastian; Suárez, Manuel; et al.; New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles; Nature Publishing Group; Scientific Reports; 11; 1; 12-2021; 1-132045-2322CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-021-93994-zinfo:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s41598-021-93994-zinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:05:16Zoai:ri.conicet.gov.ar:11336/170432instacron: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 10:05:17.207CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
title New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
spellingShingle New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
Novas, Fernando Emilio
Crocodyliformes
Jurassic
title_short New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
title_full New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
title_fullStr New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
title_full_unstemmed New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
title_sort New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
dc.creator.none.fl_str_mv Novas, Fernando Emilio
Agnolin, Federico
Lio, Gabriel L.
Rozadilla, Sebastian
Suárez, Manuel
de la Cruz, Rita
de Souza Carvalho, Ismar
Rubilar Rogers, David
Isasi, Marcelo Pablo
author Novas, Fernando Emilio
author_facet Novas, Fernando Emilio
Agnolin, Federico
Lio, Gabriel L.
Rozadilla, Sebastian
Suárez, Manuel
de la Cruz, Rita
de Souza Carvalho, Ismar
Rubilar Rogers, David
Isasi, Marcelo Pablo
author_role author
author2 Agnolin, Federico
Lio, Gabriel L.
Rozadilla, Sebastian
Suárez, Manuel
de la Cruz, Rita
de Souza Carvalho, Ismar
Rubilar Rogers, David
Isasi, Marcelo Pablo
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Crocodyliformes
Jurassic
topic Crocodyliformes
Jurassic
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We describe the basal mesoeucrocodylian Burkesuchus mallingrandensis nov. gen. et sp., from the Upper Jurassic (Tithonian) Toqui Formation of southern Chile. The new taxon constitutes one of the few records of non-pelagic Jurassic crocodyliforms for the entire South American continent. Burkesuchus was found on the same levels that yielded titanosauriform and diplodocoid sauropods and the herbivore theropod Chilesaurus diegosuarezi, thus expanding the taxonomic composition of currently poorly known Jurassic reptilian faunas from Patagonia. Burkesuchus was a small-sized crocodyliform (estimated length 70 cm), with a cranium that is dorsoventrally depressed and transversely wide posteriorly and distinguished by a posteroventrally flexed wing-like squamosal. A well-defined longitudinal groove runs along the lateral edge of the postorbital and squamosal, indicative of a anteroposteriorly extensive upper earlid. Phylogenetic analysis supports Burkesuchus as a basal member of Mesoeucrocodylia. This new discovery expands the meagre record of non-pelagic representatives of this clade for the Jurassic Period, and together with Batrachomimus, from Upper Jurassic beds of Brazil, supports the idea that South America represented a cradle for the evolution of derived crocodyliforms during the Late Jurassic.
Fil: Novas, Fernando Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Agnolin, Federico. Universidad Maimónides; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Lio, Gabriel L.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Rozadilla, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Suárez, Manuel. Universidad Andrés Bello; Chile
Fil: de la Cruz, Rita. Servicio Nacional de Geologia y Mineria (SERNAGEOMIN); Chile
Fil: de Souza Carvalho, Ismar. Universidade Federal do Rio de Janeiro; Brasil. Universidad de Coimbra; Portugal
Fil: Rubilar Rogers, David. Museo Nacional de Historia Natural Chile; Chile
Fil: Isasi, Marcelo Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
description We describe the basal mesoeucrocodylian Burkesuchus mallingrandensis nov. gen. et sp., from the Upper Jurassic (Tithonian) Toqui Formation of southern Chile. The new taxon constitutes one of the few records of non-pelagic Jurassic crocodyliforms for the entire South American continent. Burkesuchus was found on the same levels that yielded titanosauriform and diplodocoid sauropods and the herbivore theropod Chilesaurus diegosuarezi, thus expanding the taxonomic composition of currently poorly known Jurassic reptilian faunas from Patagonia. Burkesuchus was a small-sized crocodyliform (estimated length 70 cm), with a cranium that is dorsoventrally depressed and transversely wide posteriorly and distinguished by a posteroventrally flexed wing-like squamosal. A well-defined longitudinal groove runs along the lateral edge of the postorbital and squamosal, indicative of a anteroposteriorly extensive upper earlid. Phylogenetic analysis supports Burkesuchus as a basal member of Mesoeucrocodylia. This new discovery expands the meagre record of non-pelagic representatives of this clade for the Jurassic Period, and together with Batrachomimus, from Upper Jurassic beds of Brazil, supports the idea that South America represented a cradle for the evolution of derived crocodyliforms during the Late Jurassic.
publishDate 2021
dc.date.none.fl_str_mv 2021-12
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/11336/170432
Novas, Fernando Emilio; Agnolin, Federico; Lio, Gabriel L.; Rozadilla, Sebastian; Suárez, Manuel; et al.; New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles; Nature Publishing Group; Scientific Reports; 11; 1; 12-2021; 1-13
2045-2322
CONICET Digital
CONICET
url http://hdl.handle.net/11336/170432
identifier_str_mv Novas, Fernando Emilio; Agnolin, Federico; Lio, Gabriel L.; Rozadilla, Sebastian; Suárez, Manuel; et al.; New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles; Nature Publishing Group; Scientific Reports; 11; 1; 12-2021; 1-13
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/doi/10.1038/s41598-021-93994-z
info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s41598-021-93994-z
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
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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