Extended Data Figure 5. Maximum clade credibility (MCC) tree summaries of Bayesian spatio-temporal reconstructions based on different env data sets (a: “env 105”, b: “env 74”).

The tips of the trees correspond to the year of sampling while the branch (and node) colours reflect location: the sampling location for the tip branches and the inferred location for the internal branches (AF, Africa; CB, Caribbean; US, the United States, CA, California; GA, Georgia; NJ, New Jersey, NY, New York; PA, Pennsylvania). The diameters of the internal node circles reflect posterior location probability values. Thick outer circles represent internal nodes with posterior probability support > 0.95. We also depict the posterior probability density for the time of the introduction event from the Caribbean into the U.S on the time scales of the trees. The three partial env sequences from SF in 1978¹⁰ are highlighted with bullets.