Previously unseen teeth in the jawbone of Megalosaurus revealed!

Cutting edge technology sheds fresh light on world’s first scientifically described dinosaur, Megalosaurus, thanks to research by WMG at the University of Warwick and the University of Oxford’s Museum of Natural History. 

Professor Mark Williams at WMG has revealed five previously unseen teeth in the jawbone of the Megalosaurus and that historical repairs on the fossil may have been less extensive than previously thought.

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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.

Records at the Oxford University Museum of Natural History suggest that 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.

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The scans have revealed 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.

This research was made possible through a collaboration between Professor Williams’ research group at WMG, University of Warwick – including PhD researcher Paul Wilson – and Professor Paul Smith, director of the Oxford University Museum of Natural History. Professor Williams commented: “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.

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“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 which lived in the Middle Jurassic, around 167 million years ago. It would have been about 9 metres long and weighed about 1.4 tonnes (1400 kg). The research was recently presented at the Institute of Electrical and Electronics Engineers (IEEE)’s International Instrumentation and Measurement Technology Conference in Torino, Italy.

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