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

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dc.contributor.authorNovas, Fernando E.
dc.contributor.authorAgnolin, Federico L.
dc.contributor.authorLio, Gabriel L.
dc.contributor.authorRozadilla, Sebastián
dc.contributor.authorSuárez, Manuel
dc.contributor.authorde la Cruz, Rita
dc.contributor.authorde Souza Carvalho, Ismar
dc.contributor.authorRubilar-Rogers, David
dc.contributor.authorIsasi, Marcelo P.
dc.date.accessioned2025-02-24T15:40:04Z
dc.date.available2025-02-24T15:40:04Z
dc.date.issued2021-12
dc.descriptionIndexación: Scopus.
dc.description.abstractWe 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. © 2021, The Author(s).
dc.description.urihttps://www-nature-com.recursosbiblioteca.unab.cl/articles/s41598-021-93994-z
dc.identifier.citationScientific Reports, Volume 11, Issue 1, December 2021, Article number 14960
dc.identifier.doi10.1038/s41598-021-93994-z
dc.identifier.issn2045-2322
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/63574
dc.language.isoes
dc.publisherNature Research
dc.rights.licenseAttribution 4.0 International CC BY 4.0 Deed
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectArticle
dc.subjectBrazil
dc.subjectChile
dc.subjectCladistics
dc.subjectCrocodile
dc.subjectFauna
dc.subjectFossil
dc.subjectHerbivore
dc.subjectNonhuman
dc.subjectPhylogeny
dc.subjectSkull
dc.subjectTaxon
dc.subjectTithonian
dc.subjectWing
dc.titleNew transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles
dc.typeArtículo
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