Scientists have identified a new species of Tyrannosaurus, named Tyrannosaurus mcraeensis, based on a partial skull found in southeastern New Mexico. This discovery marks a significant addition to the understanding of these prehistoric apex predators.
The skull, originally unearthed in 1983 near the base of Kettle Top Butte, was previously classified as a T. rex. However, recent reassessment has revealed distinct differences that warrant its classification as a separate species. Tyrannosaurus mcraeensis, believed to have lived several million years before the well-known T. rex, shares a comparable size with its more famous relative.
Key differences noted by the researchers include a shallower, more curved lower jaw and lower hornlets above the eyes compared to T. rex. These variations are subtle but consistent across various T. rex specimens examined, indicating a distinct species. The unique traits, such as the feature above the eyes, suggest differences in feeding behavior and mate selection compared to T. rex.
This new species is thought to have originated from southern North America and predates the T. rex by millions of years. This challenges previous assumptions about the evolutionary timeline and geographic origins of giant Tyrannosaurus species.
While the discovery has stirred some debate within the paleontological community, with some experts questioning the distinctiveness of the new species, it nonetheless opens new avenues for understanding dinosaur evolution and diversity.