A ‘Terror of Tyrannosaurs’: The First Trackways of Tyrannosaurids and Evidence of Gregariousness and Pathology in Tyrannosauridae

摘要: The skeletal record of tyrannosaurids is well-documented, whereas their footprint surprisingly sparse. There are only a few isolated footprints attributed to and, hitherto, no reported trackways. We report the world's first trackways attributable tyrannosaurids, and describe new ichnotaxon tyrannosaurids. These from Upper Cretaceous (Campanian - Maastrichtian) northeastern British Columbia, Canada. One trackway consists three tridactyl footprints, two adjacent consist each. All show animals bearing southeast within an 8.5 meter-wide corridor. Similarities in depth preservation tyrannosaurid tracks indicate that these were made by track-makers walking concurrently same direction. add significantly previous osteology-based hypotheses locomotion behavior Tyrannosauridae providing ichnologic support for gregariousness gait