Is Santaniella a ranunculid? Reassessment of this enigmatic fossil angiosperm from the Lower Cretaceous (Aptian, Crato Konservat-Lagerstätte, Brazil) provides a new interpretation

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Autor(es): dc.contributorUniversidade Federal de Mato Grosso-
Autor(es): dc.contributorCurtin University-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorWilliam Jewell College-
Autor(es): dc.creatorPessoa, Edlley M.-
Autor(es): dc.creatorRibeiro, Alexandre C.-
Autor(es): dc.creatorChristenhusz, Maarten J. M.-
Autor(es): dc.creatorCoan, Alessandra Ike-
Autor(es): dc.creatorJud, Nathan A.-
Data de aceite: dc.date.accessioned2025-08-21T15:21:20Z-
Data de disponibilização: dc.date.available2025-08-21T15:21:20Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-05-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/ajb2.16163-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/247313-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/247313-
Descrição: dc.descriptionPremise: The Lower Cretaceous Crato Konservat-Lagerstätte (CKL) preserves a rich flora that includes early angiosperms from northern Gondwana. From this area, the recently described fossil genus Santaniella was interpreted as a ranunculid (presumably Ranunculaceae). However, based on our examination of an additional specimen and a new phylogenetic analysis, we offer an alternative interpretation. Methods: The new fossil was collected from an active quarry for paving stones in the state of Ceará, northeastern Brazil. We assessed support for alternative phylogenetic hypotheses using a combined analysis of morphological data and DNA sequence data using Bayesian inference. We used a consensus network to visualize the posterior distribution of trees, and we used RoguePlot to illustrate the support for alternative positions on a scaffold tree. Results: The new material includes a flower-like structure not present in the original material and also includes follicles preserved at early stages of development. The flower-like structure is a compact terminal cluster of elliptical sterile laminar organs surrounding internal filamentous structures that occur on flexuous axes. Phylogenetic analyses did not support the fossil placement among eudicots. Instead, Santaniella appears to belong in the magnoliid clade. Conclusions: The presence of seeds in a marginal-linear placentation and enclosed in a follicle supports the fossil as an angiosperm. However, even though most characters are clearly recognizable, its combination of characters does not provide strong support for a close relationship to any extant order of flowering plants. Its position in the magnoliid clade is intriguing and, based on plicate carpels, it is definitely a mesangiosperm.-
Descrição: dc.descriptionLaboratório de Estudos Integrados de Plantas Departamento de Botânica e Ecologia Universidade Federal de Mato Grosso, Mato Grosso-
Descrição: dc.descriptionDepartamento de Biologia e Zoologia Universidade Federal de Mato Grosso, Mato Grosso-
Descrição: dc.descriptionDepartment of Environment and Agriculture Curtin University, Perth, Western Australia, Australia; Royal Botanic Gardens, Kew, Richmond-
Descrição: dc.descriptionDepartamento de Biodiversidade Universidade Estadual Paulista “Júlio de Mesquita Filho,” Instituto de Biociências, São Paulo-
Descrição: dc.descriptionDepartment of Biology William Jewell College-
Descrição: dc.descriptionDepartamento de Biodiversidade Universidade Estadual Paulista “Júlio de Mesquita Filho,” Instituto de Biociências, São Paulo-
Idioma: dc.languageen-
Relação: dc.relationAmerican Journal of Botany-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectangiosperm-
Palavras-chave: dc.subjectCretaceous-
Palavras-chave: dc.subjectGondwana-
Palavras-chave: dc.subjectmacrofossil-
Palavras-chave: dc.subjectpaleobotany-
Palavras-chave: dc.subjectSouth America-
Título: dc.titleIs Santaniella a ranunculid? Reassessment of this enigmatic fossil angiosperm from the Lower Cretaceous (Aptian, Crato Konservat-Lagerstätte, Brazil) provides a new interpretation-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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