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Valanginian and Hauterivian bochianitid ammonoids from the Rosa Blanca Formation of Colombia: Palaeobiogeographic implications

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dc.creatorLehmann, Jensspa
dc.creatorBustos, Jonatanspa
dc.creatorCadena Rueda, Edwin Albertospa
dc.date.accessioned2025-07-21T16:57:30Z
dc.date.available2025-07-21T16:57:30Z
dc.date.created2025-01-24spa
dc.date.issued2025-01-24spa
dc.description.abstractThe Lower Cretaceous record of heteromorph ammonoids in northern South America is still poorly known, occurrences are often mentioned only without detailed analysis of their morphology and palaeobiogeographic implications. Here, we describe the first occurrence of Bochianites neocomiensis from the Valanginian of northern South America. This finding is from the upper Valanginian section of the Carrizal Member of the Rosa Blanca Formation. It underlines the meaning of high amplitude late Valanginian sea level rise, and related opening of migration routes, as part of the Weissert Event. Additionally, we identify Janenschites oosteri from the lower Hauterivian El Sapo Member, also within the Rosa Blanca Formation in the Zapatoca region of Colombia. The presence of B. neocomiensis and J. oosteri in Colombia broadens the palaeobiogeographical record for these species to northern South America, both trace the improving migration routes for ammonoids along the margins of the South American continent during the course of the Early Cretaceous.eng
dc.format.mimetypeapplication/pdfspa
dc.identifier.doihttps://doi.org/10.1016/j.cretres.2025.106094spa
dc.identifier.issn0195-6671spa
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/46124
dc.language.isoengspa
dc.publisherElsevierspa
dc.relation.ispartofCretaceous Research 169 (2025) 106094spa
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0195667125000175spa
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalspa
dc.rights.accesRightsinfo:eu-repo/semantics/openAccessspa
dc.rights.accesoAbierto (Texto Completo)spa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/spa
dc.sourceCretaceous Researchspa
dc.source.instnameinstname:Universidad del Rosariospa
dc.source.reponamereponame:Repositorio Institucional EdocURspa
dc.subject.keywordBochianitidaeeng
dc.subject.keywordBochianiteseng
dc.subject.keywordJanenschiteseng
dc.subject.keywordLower Cretaceouseng
dc.subject.keywordNorthern South Americaeng
dc.subject.keywordRosa Blanca Formationeng
dc.titleValanginian and Hauterivian bochianitid ammonoids from the Rosa Blanca Formation of Colombia: Palaeobiogeographic implicationsspa
dc.typearticlespa
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersionspa
dc.type.spaArtículo de Investigaciónspa
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