Bioerosion and palaeoecological association of osteophagous insects in the Maastrichtian dinosaur <i>Arenysaurus ardevoli</i>

Bioerosions produced by the osteophagous diet of animals that fed on dinosaur bones are very scarce in European fossil record. Herein we present bioerosion hadrosaurid remains from Maastrichtian Tremp Formation Pyrenean Basin, which is only second such case recorded Iberian-Occitan Plate besides a sauropod Jurassic-Cretaceous Valencia. The record particularly rich Blasi sites located municipality Arén (Huesca, Spain). In this article, referred to Arenysaurus ardevoli Blasi-3 site analysed shed light palaeoenvironment and presence palaeoecological interaction between carcase tracemakers. comprise tunnels, roundish holes, straight notches, similar traces attributed necrophagous insects (cf. Cuniculichnus seilacheri). Here, first instance activity these Upper Cretaceous Ibero-Occitan Plate. results presented lead us infer were possibly transported storm or event site, where they exposed post-mortem biotic interactions (eaten partially decomposed dermestid beetles) for prolonged time period before completely buried.