Chronogram of Heterandria formosa and related poeciliid species diversification, and gene tree results. A) Chronogram resulting from Bayesian relaxed-clock coalescent-dating analysis in BEAST based on mitochondrial cytb and RPS7 variation. Tip labels are sequence codes including population, site number, and specimen code for each individual sequenced (details in Figure 1 and Table 1). Node bars (dark blue) are 95% highest posterior densities for node ages. The analysis included three lognormally modeled fossil/biogeographic calibration points (red triangles enclose bounds of constraints). Mean node ages of interest are discussed in detail in the text. Nodal support values are of the form: Bayesian posterior probabilities (PP; ≥95)/maximum-likelihood bootstrap proportions (BP; ≥50). B) Comparison between the 'best’ gene tree of H. formosa cytb haplotypes and the 'Minimize Deep Coalescences’ species tree (at right) inferred from the haplotype tree using Maddison and Knowles’  method, with BP ≥ 50 by each node.
Bagley et al. BMC Evolutionary Biology 2013 13:223 doi:10.1186/1471-2148-13-223