1. College of Science & Engineering Flinders University Bedford Park Adelaide SA 5042 Australia
2. Key Laboratory of Vertebrate Evolution & Human Origins of China Institute of Vertebrate Paleontology & Paleoanthropology Chinese Academy of Sciences Beijing 100044 China
3. Department of Applied Mathematics Research School of Physics & Engineering The Australian National University Canberra ACT 2601 Australia
4. Department of Earth Sciences University of Oxford Oxford OX1 3BD UK
5. School of Molecular & Life Sciences Curtin University Bentley WA 6102 Australia