Dinosaur injuries interpreted through footprints
|Photo courtesy of Royal Tyrrell Museum and Rich McCrea|
Some of the specimens from western Canada that were analyzed include a lengthy trackway of an allosauroid with a hip-injury, a footprint of a young tyrannosaur with a severely dislocated toe, and a trackway of an adult tyrannosaur with a missing inner toe. Other specimens included in study are theropod footprints from the Jurassic and Cretaceous periods of western North America and Asia.
The research described the abnormalities by studying the toe impressions, which include examples of swelling, extreme curvature, dislocation, fracture, and amputation.
A number of occurrences were also found in single trackways with significant deformation implying dislocation, fracture, or absence of a single toe. Preserved footprints and trackways demonstrated injuries were not infrequent and that non-life threatening injuries affected their locomotion. For example, 21% of all tyrannosaur prints known at the time of this study showed examples of ichnopathology.
Source: Royal Tyrrell Museum [January 16, 2016]