PIONEERING scanning technology developed at Warwick University has shed fresh light on the world’s oldest dinosaur.
Research by scientists at WMG at the University of Warwick has revealed new teeth belonging to the world’s first scientifically-described dinosaur fossil of a Megalosaurus – over 200 years after it was first discovered.
Professor Mark Williams at WMG has revealed five previously unseen teeth in the jawbone of the Megalosaurus – which roamed the earth 167 million years ago – and that historical repairs on the fossil may have been less extensive than previously thought.
Using state of the art CT scanning technology and specialist 3D analysis software, Professor Williams took more than 3000 X-ray images of the world-famous Megalosaurus jawbone, creating a digital three-dimensional image of the fossil.
In an unprecedented level of analysis, Professor Williams was able to see inside the jawbone for the first time, tracing the roots of teeth and the extent of different repairs.
Some damage occurred to the specimen when it was removed from the rock, possibly shortly after it was discovered.
Records at the Oxford University Museum of Natural History, where it is kept, suggest some restoration work may have been undertaken by a museum assistant between 1927 and 1931, while repairing the specimen for display – but there are no details about the extent of the repairs or the materials used.
The scans have found previously unseen teeth that were growing deep within the jaw before the animal died – including the remains of old, worn teeth and also tiny newly growing teeth.
The scans also show the true extent of repairs on the fossil for the first time, revealing that there may have been at least two phases of repair, using different types of plaster.
This new information will help the museum make important decisions about any future restoration work on the specimen.
Professor Williams said: “Being able to use state-of-the-art technology, normally reserved for aerospace and automotive engineering, to scan such a rare and iconic natural history specimen was a fantastic opportunity.
“When I was growing up I was fascinated with dinosaurs and clearly remember seeing pictures of the Megalosaurus jaw in books that I read. Having access to and scanning the real thing was an incredible experience.”
The Megalosaurus jawbone is on display at the Oxford University Museum of Natural History alongside other bones from the skeleton.
Megalosaurus – which means ‘Great Lizard’ – was a meat-eating dinosaur. It would have been about nine metres long and weighed about 1.4 tonnes (1400 kg).
Scientists at Warwick University have discovered Megalosaurus had more teeth than first thought. Image courtesy of University of Warwick and Mark Garlick. (s)