FIG 2 .

Bayesian phylogenetic analysis of C. posadasii isolates. Beast 1.8.1 was used to produce a calibrated phylogeny, where the time to most recent common ancestor estimated for C. posadasii from the dual-species analysis whose results are presented in Fig. 1 was used for calibration here (TMRCA for C. posadasii, 818,100 years). The analysis was performed on WGS data from 51 C. posadasii genomes. Clades of interest are highlighted as follows: green, Arizona; blue, Phoenix subclade of Arizona; orange, Guatemala; and pink, Texas-Mexico-South America. Stars highlight strains of interest, while dotted circles represent TMRCA of interest. Posterior probabilities are indicated by node size. Purple node bars are shown for each node and are informative for the 95% confidence interval for the timing estimate. The timeline represents years before the present.