Bite marks of a large theropod on an hadrosaur limb bone from Coahuila, Mexico

we describe theropod bite marks on the tibia of a hadrosaurine ornithopod recovered northwest of coahuila, mexico. based on the size and shape of the bites, these marks are attributed to a tyrannosaurine. the finding provides support for recent hypotheses on theropod feeding behavior and palaeoecology.