FIGURE 5 in The sprightly little sphaerodactyl: Systematics and biogeography of the Puerto Rican dwarf geckos Sphaerodactylus (Gekkota, Sphaerodactylidae)

FIGURE 5. Phylogeny and biogeography of sampled Sphaerodactylus geckos. A. Map of the Greater and Lesser Antilles. Sampled regions are color coded: Hispaniola = yellow; Puerto Rico and the islands of the Puerto Rican bank = blue; Jamaica = orange; Lesser Antilles = black. B. Time-calibrated species tree of sampled Sphaerodactylus species estimated using Star- BEAST2. Numbers at nodes indicate Bayesian posterior probabilities (BPP), unlabeled nodes have BPP <0.75. Dark gray horizontal lines at nodes are Bayesian posterior distributions of divergence time, in millions of years. Colored circles at tips indicate geographical distribution and colored nodes correspond to ancestral area reconstruction using stochastic mapping. Time line at the bottom of the tree is in millions of years ago (Ma) with geological periods labelled. The light gray vertical box, labelled "indirect reproductive isolation", encompasses the posterior distribution of divergence times between S. townsendi and S. nicholsi, two species that exhibit post-zygotic reproductive isolation (Pinto et al. 2019). Assuming this is the time necessary to evolve reproductive isolation, this can be an indirect measure for species delimitation. Taxa with divergence time distributions that overlap or are older than the S. townsendi and S. nicholsi split are old enough to have evolved reproductive isolating barriers and are thus candidate species.