Fig. 1.

(A and C–H) Possible speciation scenarios on islands. Triangles represent native island species, with green for endemic species and red for non-endemics. Circles represent species not found on the island. Divergences are shown relative to the age of the island (AOI). Posterior probabilities (pp) are indicated for nodes of interest. (A) Sympatric speciation. (C) Allopatric speciation. (D) Colonization without speciation. (E–H) Equivocal scenarios. (B) Metrosideros nervulosa growing on Mt. Gower, LHI.