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High fidelity preservation of fossil insects from the Crato Formation (Lower Cretaceous) of Brazil
Affiliation:1. Steinmann Institute, Section Palaeontology, University of Bonn, Nussallee 8, 53115 Bonn, Germany;2. University of Iceland, Institute of Earth Sciences, Sturlugata 7, 101 Reykjavík, Iceland;3. University of Vienna, Department of Palaeontology, Althanstraße 14 (UZA II), A-1090 Vienna, Austria;4. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;5. CNRS UMR 7205, Muséum National d''Histoire Naturelle, CP 50, Entomologie, 45 rue Buffon, F-75005 Paris, France;6. Icelandic Institute of Natural History, Urriðaholtsstræti 6-8, 212 Garðabær, Iceland;7. A.N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow 119071, Russia;8. Division of Entomology, Natural History Museum, and Department of Ecology and Evolutionary Biology, 1501 Crestline Drive-Suite 140, University of Kansas, Lawrence, KS 66045, USA;1. Petrobras — Petroleo Brasileiro S.A., Avenida Chile, 330, Rio de Janeiro, RJ, Brazil;2. UNESP — Universidade Estadual Paulista, Instituto de Geociencias e Ciencias Exatas, Avenida 24A, 1515 Rio Claro, SP, Brazil
Abstract:Fossil insects from the Lower Cretaceous (Aptian) Crato Formation of north-east Brazil are preserved as goethite replacements in laminated limestones of lacustro-lagoonal origin. They display remarkable degrees of morphological detail down to the macromolecular level in some examples. We document the fidelity of preservation and reveal an astonishing variety of morphological detail comparable in some instances with that found in amber inclusions.
Keywords:Insect  Taphonomy  Early Cretaceous  Aptian  Crato Formation  Brazil
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