About the Author

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Paul M. Barrett is a member of The Palaeontological Association. He is Merit Researcher at the Natural History Museum, Earth Sciences, United Kingdom. Barrett was previously a researcher for the museum and a Departmental Lecturer in Animal Diversity at the University of Oxford, Department of Zoology in the UK. Dr Andrew Milner is an Emeritus Reader in Vertebrate Palaeontology at Birkbeck University of London.