Beyond the lower-bound: the fossil record can provide empirically-informed prior distributions on node ages in poorly-sampled groups
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Beyond the lower-bound: the fossil record can provide empirically-informed prior distributions on node ages in poorly-sampled groups
- 1. Beyond the lower-bound: the fossil record can provide empirically-informed prior distributions on node ages in poorly-sampled groups Graeme T. Lloyd, Matt Friedman and Mark A. Bell
- 2. Credit/blame Matt Friedman Mark Bell
- 3. When?
- 4. When?
- 8. Fossil dating approaches #1 Nowak et al. 2013
- 9. Fossil dating approaches #2 Bapst in press Time
- 10. Required data TreeTip ages Sampling rate Branching rateExtinction rate Extant diversity
- 11. Required data TreeTip ages Sampling rate Branching rateExtinction rate Extant diversity
- 12. Fossil dating approaches #3 τ6 τ5 τ4 τ2 τ1 τ3 Hedman 2010 τ0
- 13. Fossil dating approaches #3 τ0 τ6 τ5 τ4 τ2 τ1 τ3 Hedman 2010 Age (Ma) τ0
- 18. Frequency of problem Lloyd et al. 2008 135/416 ‘unique’ nodes
- 19. Frequency of problem 135/416 ‘unique’ nodes What about the other two thirds? Lloyd et al. 2008
- 24. Modified approach 1 2 3 1 2 3 Min Max
- 26. Data • Informal supertree • Molecular backbone • 29 source trees • 567 taxa (483 fossil) • c. 10 minutes
- 27. Dated tree
- 28. Testing t0
- 29. Testing t0
- 30. Cambrian vs. Jurassic t0: Median
- 31. Cambrian vs. Jurassic t0: Mean
- 32. Cambrian vs. Jurassic t0: L95%
- 33. Cambrian vs. Jurassic t0: U95%
- 34. Molecular divergences #1 Meredith et al. 2011
- 35. Molecular divergences #2 dos Reis et al. 2012
- 36. Molecular comparison This study Meredith et al. 2011 dos Reis et al. 2012 This study - Meredith et al. 2011 1.07-1.17 - dos Reis et al. 2012 1.00-1.09 1.00-1.16 -
- 37. Molecular comparison Thisstudy Meredith et al. 2011 dos Reis et al. 2012
- 40. Conclusions