Fig. 4

Chronogram of the core formicoxenines, sensu Ward et al. [2], from a BEAST analysis, with Temnothorax praecreolus and the myrmicine outgroups not shown. Bars depict the 95% HPD (highest posterior density). Biogeographical history as inferred from an average of six models tested in BioGeoBEARS is superimposed on the chronogram. Nodes with two areas indicate taxon occupancy of both realms