This document presents research exploring phylogenetic diversity (PD) over deep time using Mesozoic dinosaurs. The researchers constructed updated phylogenetic hypotheses incorporating 100 trees for major dinosaur groups. They calculated PD through time for various dinosaur groups and found high correlation between PD and taxonomic richness. Overall PD tracks closely with traditional measures of paleobiodiversity, suggesting it captures evolutionary history well. Further work is still needed to refine temporal calibrations.

1. Phylogenetic diversity through deep time: an
exploration using Mesozoic dinosaurs
Graeme T. Lloyd @GraemeTLloyd
David W. Bapst @dwbapst
Matt Friedman @Friedman_Lab
Katie E. Davis @drkatiedavis

2. Caveat emptor

3. Caveat emptor

4. Biodiversity

5. Biodiversity
Suezichthys n. sp.

6. Biodiversity
Suezichthys n. sp.

7. Palaeobiodiversity

8. Palaeobiodiversity
Time (Ma)
Sepkoski 2002

9. Palaeobiodiversity
Time (Ma)
Sepkoski 2002; Foote 1994

10. The problem

11. The problem

12. =
The problem
5 spp. 5 spp.

13. PD as a solution?

14. PD as a solution?
Fritz and Purvis 2010

15. Limiting factor

16. Largest fossil-only phylogenies
Pisani et al. 2002; Lloyd et al. 2008

17. Updated phylogenetic hypothesis

18. Updated phylogenetic hypothesis
100 trees

19. Temporal data

20. Results

21. Results: DinosauriaPD(m.y.)
Time (Ma)

22. Results: OrnithischiaPD(m.y.)
Time (Ma)

23. Results: TheropodaPD(m.y.)
Time (Ma)

24. Results: SauropodomorphaPD(m.y.)
Time (Ma)

25. Roots: Ornithischia

26. Roots: Theropoda

27. Roots: Sauropodomorpha

28. Roots: Dinosauria

29. Roots: Dinosauria
K-Pg
reset

30. Correlation with richness

31. Correlation with richness

32. Correlation with richness
Mean = 0.92

33. Correlation with richness
Mean = 0.92

34. Correlation with richness
Mean = 0.92

35. Still to do

36. Still to do
cal3

37. Still to do
cal3

38. Still to do
cal3

39. Still to do
cal3

40. Conclusions

41. Conclusions

42. Conclusions

43. Conclusions

44. Conclusions