a assuming a generation time of 8 years, which gives 10,000 yr BP and 3.1 My BP for 1,250 and 375,000 generations, respectively.
S values are obtained from 1,000 trees simulated under a null model of allopatric divergence (scenario b in Figure 4). Similar values were obtained for scenario c in Figure 4. Trees were simulated under neutral coalescent with no migration under varying generation times and effective population sizes. Observed s = 4.