Fig. 9.

The impact of the speciation rate parameter $\lambda \in [0.1,50]$ and the turnover rate $\mu /\lambda =0$ and 0.5 on the existence of unranked and ranked anomaly zones. For each combination of $(n,\lambda ,\mu )$, the probability of the species tree being in the anomaly zone was computed from 5,000 species trees. Probabilities of the unranked anomaly zone appear to increase with λ, whereas probabilities of the ranked anomaly zone increase up to a certain value $\lambda \approx 5$ and then begin to decrease.