ArticlePeerJ2016
Deciphering the preservation of fossil insects: a case study from the Crato Member, Early Cretaceous of Brazil.
Article in PeerJ, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 65 citations in OpenAlex.
- Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil).Anatomical record (Hoboken, N.J. : 2007) · 2026Article
- Exploring the morphology and taphonomy of Archaeoniscus brodiei-a gregarious, Early Cretaceous isopod.Die Naturwissenschaften · 2025Article
- Taphonomy of aquatic insects from the Crato Formation Lagerstätte (Aptian, Lower Cretaceous) under an actualistic look.PloS one · 2025Article
- Biomolecules in Pleistocene fossils from tropical cave indicate fossil biofilm.Scientific reports · 2024Article
- A new Gondwanan mayfly family from the Lower Cretaceous Crato Formation, Brazil (Ephemeroptera: Siphlonuroidea: Astraeopteridae fam. nov.).Scientific reports · 2023Review
- Article
- Mass mortality events of autochthonous faunas in a Lower Cretaceous Gondwanan Lagerstätte.Scientific reports · 2021Article
- A new Devonian euthycarcinoid reveals the use of different respiratory strategies during the marine-to-terrestrial transition in the myriapod lineage.Royal Society open science · 2020Article
- Revealing the diversity of amber source plants from the Early Cretaceous Crato Formation, Brazil.BMC evolutionary biology · 2020Article
- Physicochemical investigation of shrimp fossils from the Romualdo and Ipubi formations (Araripe Basin).PeerJ · 2019Article
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Authors and funding
12 authors at 6 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
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.
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