Fossil insects from the Lower Cretaceous (Aptian) Crato Formation of northeast Brazil are preserved as goethite replacements in laminated limestones of lacustro-lagoonal origin. They display remarkable degrees of morphological detail down to the macro molecular level in some examples. We document the fidelity of preservation and reveal a remarkable variety of morphological detail comparable in some instances with that found in amber inclusions.

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In our recent paper discussing the impacts of dragonfly behaviour on their taphonomy from the Lower Cretaceous Crato Formation of Brazil (Barling et al., 2021), we figured eight specimens (Fig. 3, p. 145) illustrating dragonflies in various states of preservation. In the caption to this figure we listed the temporary laboratory numbers assigned to these specimens during the study (identified with the prefix “UOP-PAL-”) and not their permanent accession numbers. On completion of the study, all specimens were transferred to the Museu de Paleontologia Plácido Cidade Nuvens (MPPCD) at the Universidade Regional do Cariri in Crato, Brazil.