Multiple-Rusophycus assemblage from the Parnaíba Basin (NE Brazil) reflects trilobites as tracemakers and molting behavior

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Autor(es): dc.contributorFederal University of Rio de Janeiro-
Autor(es): dc.contributorUnisinos University-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal de Pernambuco (UFPE)-
Autor(es): dc.contributorUniversidade Federal do Rio de Janeiro (UFRJ)-
Autor(es): dc.creatorSedorko, Daniel-
Autor(es): dc.creatorde Barros, Gabriel E. B.-
Autor(es): dc.creatorNetto, Renata Guimarães-
Autor(es): dc.creatorGhilardi, Renato Pirani-
Autor(es): dc.creatorAgostinho, Sônia-
Autor(es): dc.creatorRamos, Kimberly Silva-
Autor(es): dc.creatorFranco Neto, Emmanuel-
Autor(es): dc.creatorMoreira Junior, Carlos Alves-
Autor(es): dc.creatorBorghi, Leonardo-
Data de aceite: dc.date.accessioned2025-08-21T18:37:45Z-
Data de disponibilização: dc.date.available2025-08-21T18:37:45Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2022-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3389/fevo.2023.1117947-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/301312-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/301312-
Descrição: dc.descriptionTrilobites inhabited all environments of Paleozoic seas, ranging from estuaries to continental slopes, and were globally distributed. Although their functional morphology and phylogenetic relations are established by well-preserved body fossils, the behavior of trilobites has received less attention. Three well-known trace fossils are interpreted to be produced by trilobitomorphs when preserved in Paleozoic rocks, Rusophycus (a resting trace), Cruziana (a furrowing trace), and Diplichnites (a locomotion trace). Those trace fossils unveil some aspects of trilobite behavior, but they were not investigated to test paleoecologic strategies based on morphometric parameters. This study uses Rusophycus to access the paleoecologic strategies of trilobites in storm-dominated shallow marine deposits of the Pimenteira and Cabeças formations (Middle to Upper Devonian, Parnaíba Basin, Brazil). It was conducted a detailed analysis of the Rusophycus specimens in a section that represents the transition between the Pimenteira and Cabeças formations (Parnaíba Basin). The width and length of the Rusophycus were measured, and statistical analyses were performed to understand the population characteristics. Relatively small-sized Rusophycus are dominant in such deposits, suggesting the dominance of young tracemakers and inferred r-strategist populations. The here reported multiple-Rusophycus assemblage reveals paleoecologic strategies of the population, and tiers relationship (cross-cutting epistratal and shallow-tier trace fossils such as Bergaueria, Palaeophycus, and Protopaleodictyon) indicate deep Rusophycus. The main reason for those burrowing activities deep in the substrate might be protection during ecdysis. Thus, the random distribution, lack of hunting evidence, and depth of Rusophycus suggest molting activity as the trigger for their production in storm-influenced beds of the Pimenteira Formation, probably by calmoniids or homalonotids.-
Descrição: dc.descriptionMuseu Nacional Departamento de Geologia e Paleontologia Federal University of Rio de Janeiro, RJ-
Descrição: dc.descriptionICHNOS Research Group Geology Graduate Program Unisinos University, RS-
Descrição: dc.descriptionPrograma de Pós-Graduação em Ecologia e Recursos Naturais (PPGERN) Universidade Federal de São Carlos, UFSCar—São Carlos Campus, SP-
Descrição: dc.descriptionLaboratório de Paleobiologia e Astrobiologia (LPA) Departamento de Biologia (DBio) Universidade Federal de São Carlos, UFSCar—Sorocaba Campus, SP-
Descrição: dc.descriptionFaculdade de Ciências de Bauru Universidade Estadual Paulista Júlio de Mesquita Filho, SP-
Descrição: dc.descriptionCentro de Tecnologia e Geociências Universidade Federal de Pernambuco, PE-
Descrição: dc.descriptionLaboratório de Geologia Sedimentar Departamento de Geologia Universidade Federal do Rio de Janeiro, RJ-
Descrição: dc.descriptionFaculdade de Ciências de Bauru Universidade Estadual Paulista Júlio de Mesquita Filho, SP-
Idioma: dc.languageen-
Relação: dc.relationFrontiers in Ecology and Evolution-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcabeças formation-
Palavras-chave: dc.subjectcanindé group-
Palavras-chave: dc.subjectmolting-
Palavras-chave: dc.subjectpimenteira formation-
Palavras-chave: dc.subjecttrilobites-
Título: dc.titleMultiple-Rusophycus assemblage from the Parnaíba Basin (NE Brazil) reflects trilobites as tracemakers and molting behavior-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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