Figure 3.

(a) Bayesian species tree inferred using *BEAST with numbers above branches representing posterior probability values (only values greater than 0.85 are shown). The speciation probabilities, analysed using BP&P, are provided for each node under three combinations of priors: top, assuming large population sizes Θ ∼ G(1, 10) and deep divergences τ₀ ∼ G(1,10); middle, assuming small population sizes Θ ∼ G(2,2000) and shallow divergences τ₀ ∼ G(2,2000); bottom, assuming large populations sizes Θ ∼ G(1,10) and relatively shallow divergences τ₀ ∼ G(2,2000). (b) Geographical distributions of Portieria species within the Philippines. Most species exhibit intra-archipelagic endemism; only three species are more widely distributed within the archipelago (S6, S39 and V32). Detailed species distributions are provided in the electronic supplementary material, figure S3.