Morphology and taxonomic position of the bizarre Permian pachydomid bivalve Leinzia from Western Gondwana

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorSimoes, Marcello G. [UNESP]-
Autor(es): dc.creatorGuerrini, Vitor B. [UNESP]-
Autor(es): dc.creatorMatos, Suzana A. [UNESP]-
Autor(es): dc.creatorRohn, Rosemarie [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:05:47Z-
Data de disponibilização: dc.date.available2022-02-22T00:05:47Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2019-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.4202/app.00665.2019-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/195427-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/195427-
Descrição: dc.descriptionThe genus Leinzia is a typical member of the renowned Artinskian-Wuchiapingian (Permian) endemic bivalve fauna of the Passa Dois Group, Parana Basin, Brazil. The extraordinary shells of Leinzia, characterized by a rostrum extending from the anterior cardinal margin led certain authors to regard them as bivalved arthropods (Spinicaudata). Due to the unusual morphology and typically poor preservation of the available specimens, the taxonomic position of Leinzia still remains obscure. Leinzia has been variously referred either to the Pterioida, the Crassatelloidea, the Sanguinolitidae, or the Megadesmidae, or to the Pholadomyida. Herein, based on a detailed review of the topotype material and description of newly found specimens of Leinzia from the Serrinha Member, Rio do Rasto Formation, southern Brazil, we shed light on the taxonomic position of this genus. The hinge of the right valve with its large, blunt, anteriorly inclined subumbonal tooth and corresponding socket in the left valve coupled with the absence of true lateral teeth indicate close affinities to Pyramus and Cowperesia. Thus, the data here strongly suggest a Pachydomidae (Edmondioidea) rather than a Crassatelloidea affinity for Leinzia. Conversely, Leinzia differs from all other known Pachydomidae due to its anteriorly rostrate and posteriorly elongated shell. Finally, detailed stratigraphic data indicate that the vertical distribution of Leinzia is constrained to the middle part of the Guadalupian Serrinha Member of the Rio do Rasto Formation.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionSao Paulo State Univ, Inst Biosci, Botucatu Campus,POB 510, BR-18618689 Botucatu, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Inst Geosci & Exact Sci, Rio Claro Campus, BR-13506900 Rio Claro, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Inst Biosci, Botucatu Campus,POB 510, BR-18618689 Botucatu, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Inst Geosci & Exact Sci, Rio Claro Campus, BR-13506900 Rio Claro, Brazil-
Formato: dc.format291-303-
Idioma: dc.languageen-
Publicador: dc.publisherInst Paleobiologii Pan-
Relação: dc.relationActa Palaeontologica Polonica-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectBivalvia-
Palavras-chave: dc.subjectPachydomidae-
Palavras-chave: dc.subjectMegadesmidae-
Palavras-chave: dc.subjectendemism-
Palavras-chave: dc.subjectGuadalupian-
Palavras-chave: dc.subjectParana Basin-
Palavras-chave: dc.subjectBrazil-
Título: dc.titleMorphology and taxonomic position of the bizarre Permian pachydomid bivalve Leinzia from Western Gondwana-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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