Researchers from the University of Alberta have uncovered a fascinating revelation suggesting that a raptor dinosaur may have preyed upon a larger tyrannosaur. The evidence emerged from bite marks found on the jaw of an Albertosaurus, a relative of the famous Tyrannosaurus rex, known colloquially as its “teenage cousin,” which inhabited Alberta approximately 70 million years ago.
The fossil in question belonged to an eight-year-old Albertosaurus that had not yet reached its full size. The discovery of the bite marks prompted researchers to consider two differing explanations regarding the fate of the dinosaur after its demise near Drumheller, Alberta. The prevailing theory posits that a raptor, a smaller carnivorous dinosaur, scavenged on the deceased Albertosaurus, whose cause of death remains unknown.
Philip Currie, a dinosaur paleobiology professor at the University of Alberta, described the finding as a noteworthy instance of carnivore-carnivore interaction, shedding light on the behavior of these ancient creatures. This insight could revolutionize our understanding of how carnivorous dinosaurs coexisted and navigated the prehistoric food chain.
The investigation, led by Joshua Doyon, a paleontology master’s student at the University of Alberta, involved analyzing the spacing between the bite marks and matching them with the dental patterns of contemporaneous carnivorous dinosaurs, pointing to a raptor as the likely culprit. Alternatively, there is a hypothesis suggesting that the Albertosaurus was cannibalized by a much younger member of its own species.
The fossil was initially stumbled upon by a member of the public in 2022 while exploring the badlands north of Drumheller, subsequently reported to the Royal Tyrrell Museum. The museum’s staff, upon noticing the tooth marks as they assembled the fossil, paved the way for Doyon’s research initiative in 2023.
Doyon’s interest in studying dinosaur behavior and species interactions was piqued by this specimen, offering a unique window into a prehistoric feeding event. Currie emphasized the importance of scrutinizing fossil details, such as tooth marks, to glean insights into dinosaur biology and ecological dynamics.
The discovery underscores the significance of examining fossils for nuanced information beyond mere identification, potentially unraveling hidden aspects of ancient ecosystems. By delving into these minute details, researchers aim to deepen our understanding of predator-prey relationships and species dynamics in prehistoric realms.