Late Campanian theropod trackways from Porvenir de Jalpa, Coahuila, Mexico

Héctor E. Rivera-Sylva , Eberhard Frey , Christian Meyer, Anne S. Schulp , Wolfgang . Stinnesbeck and Valentin Vanhecke

Confident attribution of bipedal tridactyl dinosaur tracks to theropods or ornithopods can be challenging. Here we describe trackways produced by tetanuran dinosaurs, previously attributed to hadrosaurs, from Coahuila State, northeastern Mexico. Multiple trackways headed in the same direction suggest gregarious behaviour in these late Campanian theropods.