1. Australian Centre for Astrobiology, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia.
2. Department of Earth and Environmental Sciences and MQ Marine Research Centre, Macquarie University, Sydney, Australia.
3. Department of Biological Sciences, Macquarie University, Sydney, Australia.
4. Department of Earth Sciences, Palaeobiology, Uppsala University, Uppsala, Sweden.
5. Department of Geological Sciences, University of Missouri, Columbia, Missouri.