Meet the 'Dragon Prince': New dinosaur discovery rewrites the Tyrannosaur family tree
Mongolia
has uncovered a new species of
dinosaur
that could reshape everything we thought we knew about the evolution of Tyrannosaurs. Named Khankhuuluu Mongoliensis, or "Dragon Prince of Mongolia", this 86-million-year-old predator is now considered the closest known ancestor of the fearsome Tyrannosaurus rex. With its transitional traits and smaller size, the find reveals a crucial evolutionary chapter between small, agile hunters and the massive apex predators that ruled the Late Cretaceous. Scientists say the discovery, buried for decades in a museum collection, offers fresh insight into how Tyrannosaurs evolved their powerful bite, skull shape, and dominant ecological role in both Asia and North America.
A dinosaur fossil of 'Dragon Price' hidden in plain sight
The partial skeletons that led to this discovery were actually excavated in Mongolia back in the 1970s. At the time, they were thought to belong to a species called Alectrosaurus. It wasn't until PhD student Jared Voris took a closer look, decades later, that the unique features of this new species began to emerge. Working alongside Professor
Darla Zelenitsky
from the University of Calgary, Voris spotted key differences in the skull and nasal bones that clearly separated it from other known dinosaurs.
What is Khankhuuluu Mongoliensis
Named after the word for 'dragon' in Mongolian and the region it was found in, Khankhuuluu Mongoliensis bridges a crucial gap in the
Tyrannosaur
timeline. Weighing around 750 kilograms, it was far smaller than the T. rex, which could tip the scales at over 6 tonnes. But it had key traits that hint at the future kings of the dinosaur world. Its skull showed signs of strengthening, and its jaw was developing the structure needed for the bone-crushing bite Tyrannosaurs are known for.
The evolution of Tyrannosaurs
Early members of the Tyrannosaur family were small, quick-footed hunters living in the shadows of larger meat-eaters. Khankhuuluu represents a shift from these agile predators towards the bulkier, more powerful giants of the Late Cretaceous. With stronger jaws and a larger build than its predecessors, it shows how evolution favoured size and strength over time. These adaptations eventually led to the dominance of species like T. rex, which could take down massive prey and even crush bones.
A journey across continents
Another important insight from this discovery is the role of ancient land bridges between Asia and North America. During the Late Cretaceous period, areas like Siberia and Alaska were connected, allowing species like Tyrannosaurs to migrate and evolve in new environments. This movement helped spark the emergence of distinct groups on different continents, explaining how similar predators could be found in both Asia and North America.
Rewriting the family tree
With the addition of Khankhuuluu Mongoliensis to the record, palaeontologists now have a clearer picture of how Tyrannosaurs evolved. It fills a key gap between the small early forms and the gigantic predators that came later. The findings, published in the journal Nature, could prompt scientists to revisit other old fossils that may have been misclassified. This discovery serves as a reminder that sometimes the answers to big questions have been waiting quietly in storage.
What museum collections can still teach us
What makes this story even more remarkable is that the fossil had been sitting in a
Mongolian museum
for over 40 years. It highlights how valuable museum collections are and how new techniques, fresh perspectives and even young researchers can uncover major breakthroughs from existing specimens. Not every discovery requires a dig, some are hidden in plain sight.
Before the kings, there were princes
The discovery of Khankhuuluu Mongoliensis gives us a rare look at the early days of a dynasty. While this dinosaur didn't have the size or fearsome presence of its famous descendants, it carried the building blocks of what would become one of Earth's most iconic predators. As Professor Zelenitsky put it, 'Before Tyrannosaurs became the kings, they were princes.' And this dragon prince may just be the missing link we didn't know we needed.
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A fascinating fossil discovery in Mongolia has uncovered a new species of dinosaur that could reshape everything we thought we knew about the evolution of Tyrannosaurs. Named Khankhuuluu Mongoliensis, or "Dragon Prince of Mongolia", this 86-million-year-old predator is now considered the closest known ancestor of the fearsome Tyrannosaurus rex. With its transitional traits and smaller size, the find reveals a crucial evolutionary chapter between small, agile hunters and the massive apex predators that ruled the Late Cretaceous. Scientists say the discovery, buried for decades in a museum collection, offers fresh insight into how Tyrannosaurs evolved their powerful bite, skull shape, and dominant ecological role in both Asia and North America. A dinosaur fossil of 'Dragon Price' hidden in plain sight The partial skeletons that led to this discovery were actually excavated in Mongolia back in the 1970s. At the time, they were thought to belong to a species called Alectrosaurus. It wasn't until PhD student Jared Voris took a closer look, decades later, that the unique features of this new species began to emerge. Working alongside Professor Darla Zelenitsky from the University of Calgary, Voris spotted key differences in the skull and nasal bones that clearly separated it from other known dinosaurs. What is Khankhuuluu Mongoliensis Named after the word for 'dragon' in Mongolian and the region it was found in, Khankhuuluu Mongoliensis bridges a crucial gap in the Tyrannosaur timeline. Weighing around 750 kilograms, it was far smaller than the T. rex, which could tip the scales at over 6 tonnes. But it had key traits that hint at the future kings of the dinosaur world. Its skull showed signs of strengthening, and its jaw was developing the structure needed for the bone-crushing bite Tyrannosaurs are known for. The evolution of Tyrannosaurs Early members of the Tyrannosaur family were small, quick-footed hunters living in the shadows of larger meat-eaters. Khankhuuluu represents a shift from these agile predators towards the bulkier, more powerful giants of the Late Cretaceous. With stronger jaws and a larger build than its predecessors, it shows how evolution favoured size and strength over time. These adaptations eventually led to the dominance of species like T. rex, which could take down massive prey and even crush bones. A journey across continents Another important insight from this discovery is the role of ancient land bridges between Asia and North America. During the Late Cretaceous period, areas like Siberia and Alaska were connected, allowing species like Tyrannosaurs to migrate and evolve in new environments. This movement helped spark the emergence of distinct groups on different continents, explaining how similar predators could be found in both Asia and North America. Rewriting the family tree With the addition of Khankhuuluu Mongoliensis to the record, palaeontologists now have a clearer picture of how Tyrannosaurs evolved. It fills a key gap between the small early forms and the gigantic predators that came later. The findings, published in the journal Nature, could prompt scientists to revisit other old fossils that may have been misclassified. This discovery serves as a reminder that sometimes the answers to big questions have been waiting quietly in storage. What museum collections can still teach us What makes this story even more remarkable is that the fossil had been sitting in a Mongolian museum for over 40 years. It highlights how valuable museum collections are and how new techniques, fresh perspectives and even young researchers can uncover major breakthroughs from existing specimens. Not every discovery requires a dig, some are hidden in plain sight. Before the kings, there were princes The discovery of Khankhuuluu Mongoliensis gives us a rare look at the early days of a dynasty. While this dinosaur didn't have the size or fearsome presence of its famous descendants, it carried the building blocks of what would become one of Earth's most iconic predators. As Professor Zelenitsky put it, 'Before Tyrannosaurs became the kings, they were princes.' And this dragon prince may just be the missing link we didn't know we needed.
