“…Ancient diseases have been recognised for well over a century 1 in dinosaurs 1 2 and other pre-Cenozoic fossil vertebrate groups such as pterosaurs 3 , crurotarsans 4 , plesiosaurs 5 , mosasaurs 6 , ichthyosaurs 7 , turtles 8 , or synapsids 9 . Beside their intrinsic value in revealing a very particular facet of dinosaurian life and death – that is, the existence of certain diseases and their taxonomic and anatomic specificity, as well as of pathogenic agents responsible for them, studies into dinosaurian palaeopathologies have also contributed significantly to a more profound understanding of dinosaur behaviour.…”