The fossil, initially discovered in 1983 near Kettle Top Butte, was originally classified as T. rex. However, upon closer examination, researchers noted distinct differences in the skull's structure.
An artist's reconstruction of the newly identified dinosaur species Tyrannosaurus mcraeensis. (Photo: Reuters)
New Delhi,UPDATED: Jan 12, 2024 14:27 IST
Scientists have identified a new species of Tyrannosaurus from a partial skull found in New Mexico, challenging the long-held belief that Tyrannosaurus rex was the sole member of its genus.
The study, published in Scientific Reports, suggests that this new species, named Tyrannosaurus mcraeensis, roamed the earth several million years before its famous cousin T. rex.
The fossil, initially discovered in 1983 near Kettle Top Butte, was originally classified as T. rex. However, upon closer examination, researchers noted distinct differences in the skull's structure, including a shallower and more curved lower jaw and less prominent hornlets above the eyes. These subtle yet consistent variations led to the conclusion that T. mcraeensis is indeed a separate species.
Paleontologist Anthony Fiorillo, one of the study's authors, emphasized the importance of these traits, which could indicate different feeding behaviors and mating preferences compared to T. rex.
The discovery of T. mcraeensis also suggests that giant tyrannosaurs evolved earlier and possibly originated from southern North America, shifting the narrative on the evolution of these colossal predators.
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Despite the excitement surrounding this revelation, some experts remain skeptical. Paleontologist Thomas Carr has expressed doubts, attributing the observed differences to individual variation and relative maturity rather than evidence of a new species. He also questioned the dating method used, which relied on rock beneath the fossil rather than the skull itself.
The debate over the existence of multiple Tyrannosaurus species is not new. In 2022, a study proposed that T. rex might represent three distinct species based on variations in thighbones and teeth. This claim, too, faced criticism from scientists who argued that the evidence was not compelling enough to warrant reclassification.
The new story of Tyrannosaurus mcraeensis adds a fascinating chapter to our understanding of the prehistoric world.
Published By:
Sibu Kumar Tripathi
Published On:
Jan 12, 2024
English (US) ·