Deciphering the preservation of fossil insects: A case study from the Crato Member, Early Cretaceous of Brazil

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dc.contributor.authorOses G.L.
dc.contributor.authorPetri S.
dc.contributor.authorBecker-Kerber B.
dc.contributor.authorRomero G.R.
dc.contributor.authorRizzutto M.A.
dc.contributor.authorRodrigues F.
dc.contributor.authorGalante D.
dc.contributor.authorda Silva T.F.
dc.contributor.authorCurado J.F.
dc.contributor.authorRangel E.C.
dc.contributor.authorRibeiro R.P.
dc.contributor.authorPacheco M.L.A.F.
dc.date.accessioned2019-08-19T23:47:14Z
dc.date.available2019-08-19T23:47:14Z
dc.date.issued2016
dc.description.abstract© 2016 Osés et al.Exceptionally well-preserved three-dimensional insects with fine details and even labile tissues are ubiquitous in the Crato Member Konservat Lagerstätte (northeastern Brazil). Here we investigate the preservational pathways which yielded such specimens. We employed high resolution techniques (EDXRF, SR-SXS, SEM, EDS, micro Raman, and PIXE) to understand their fossilisation on mineralogical and geochemical grounds. Pseudomorphs of framboidal pyrite, the dominant fossil microfabric, display size variation when comparing cuticle with inner areas or soft tissues, which we interpret as the result of the balance between ion diffusion rates and nucleation rates of pyrite through the originally decaying carcasses. Furthermore, the mineral fabrics are associated with structures that can be the remains of extracellular polymeric substances (EPS). Geochemical data also point to a concentration of Fe, Zn, and Cu in the fossils in comparison to the embedding rock. Therefore, we consider that biofilms of sulphate reducing bacteria (SRB) had a central role in insect decay and mineralisation. Therefore, we shed light on exceptional preservation of fossils by pyritisation in a Cretaceous limestone lacustrine palaeoenvironment.
dc.description.firstpagee2756
dc.description.issuenumber12
dc.description.volume2016
dc.identifier.citationOSÉS, GABRIEL LADEIRA; RANGEL, ELIDIANE CIPRIANO; RIBEIRO, RAFAEL PARRA; PACHECO, MÍRIAN LIZA ALVES FORANCELLI; PETRI, SETEMBRINO; BECKER-KERBER, BRUNO; ROMERO, GUILHERME RAFFAELI; RIZZUTTO, MARCIA DE ALMEIDA; RODRIGUES, FABIO; GALANTE, DOUGLAS; DA SILVA, TIAGO FIORINI; CURADO, JESSICA F.. Deciphering the preservation of fossil insects: a case study from the Crato Member, Early Cretaceous of Brazil. PeerJ, v. 4, p. e2756, 2016.
dc.identifier.doi10.7717/peerj.2756
dc.identifier.issn2167-8359
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1395
dc.relation.ispartofPeerJ
dc.rightsAcesso Aberto
dc.subject.otherlanguageAraripe Basin
dc.subject.otherlanguageCrato Member
dc.subject.otherlanguageEarly Cretaceous
dc.subject.otherlanguageExceptional preservation
dc.subject.otherlanguageInsects
dc.subject.otherlanguagePaleometry
dc.subject.otherlanguagePyrite
dc.subject.otherlanguageTaphonomy
dc.titleDeciphering the preservation of fossil insects: A case study from the Crato Member, Early Cretaceous of Brazil
dc.typeArtigo
fei.scopus.citations38
fei.scopus.eid2-s2.0-85007287753
fei.scopus.updated2024-03-04
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85007287753&origin=inward
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