New Dinosaur Species Identified from Isle of Wight Fossil Stored for a Century

A new species of predatory dinosaur, named Invictibellatrix amberina, has been identified from a fossil that sat unstudied in a London museum drawer for nearly 100 years. The discovery, published in the journal Royal Society Open Science, marks the first time a megaraptoran has been found in Europe.

The fossil, a partial braincase, was originally discovered in 1924 by amateur palaeontologist Reginald Walter Tooley on the south-west coast of the Isle of Wight. It was acquired by the Natural History Museum as part of a collection of more than 1,000 specimens but remained unclassified for decades.

Anatomical Features and Size

Invictibellatrix amberina belongs to the megaraptorans, a group of agile, two-legged carnivores closely related to tyrannosaurs. Unlike tyrannosaurs, which relied on powerful jaws, megaraptorans used large arms and giant curved claws to attack prey.

According to the study, the dinosaur lived during the Early Cretaceous period, approximately 120 million years ago. Researchers estimate it was three to four metres long and just over a metre and a half in height, roughly the size of a large tiger. It likely had feathers and claws measuring between 10cm and 20cm long.

Dr Cassius Morrison, the lead author from University College London (UCL), stated that the animal occupied a role in the food chain similar to that of a hyena today, preying on small dinosaurs, lizards, and mammals.

Significance for European Paleontology

Prior to this discovery, megaraptoran fossils had only been found in Asia, Australia, and South America. The identification of Invictibellatrix fills a significant gap in the fossil record, suggesting that megaraptorans migrated from Asia through Europe before dispersing to southern landmasses.

"It is a real mystery that this fossil was overlooked for so long, sitting in a drawer for nearly 100 years," said Dr Morrison. "Lots of bones are found on the Isle of Wight – who knows what else is waiting to be discovered."

The research team used CT scans to create a 3D model of the skull and compared it with other theropod dinosaurs. They also employed mathematical modelling to trace the group's global spread.

Implications for Human Safety

While Invictibellatrix was not the apex predator of its time, researchers noted its specific morphology made it a significant threat to smaller prey. Dr Morrison suggested that if humans had existed during this period, they would have been "perfect-sized prey, about a third of their body weight."

"They definitely would have chased us," Morrison said. "A T. rex would not have bothered, as we would have been too small."

Why it matters

This discovery highlights the enduring value of historical museum collections. Professor Paul Barrett, the study's senior author from the Natural History Museum, emphasized that "despite over 200 years of collecting, the Isle of Wight continues to surprise us with new dinosaur species." The find provides critical evidence for the biogeographic dispersal of megaraptorans, linking populations in South-East Asia, Australia, and South America via Europe and Africa.

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Sources

• bbc.co.uk: Isle of Wight fossil identified as new dinosaur species - BBC News
• newscientist.com: Dinosaur named new species a century after fossil found on Isle of Wight | New Scientist
• cristinaiglesias.com: New Dinosaur Species Identified From Fossil Stored for 100 Years: What We Know | Collin Rugg News
• bbntimes.com: Isle of Wight Fossil Identified as New Dinosaur Species: The 'Unconquered Female Warrior' That Would Have Hunted Humans
• geo.tv: Isle of Wight fossil identified as Europe's first long-clawed Megaraptoran Dinosaur
• streamlinefeed.co.ke: New Megaraptoran Dinosaur Species Identified from Isle of Wight Fossil Overlooked for a Century | Streamline

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