Table 2. Divergence dates of the seven Poicephalus species, with Psittacus erithacus as outgroup, analysed with a Bayesian lognormal relaxed-clock model.

The mean estimated values and the 95% highest posterior density (HPD) ranges are given for the two dataset partitions. The node numbers correspond to Fig 4B. See S1 Fig for the corresponding maximum clade probability trees.

	Divergence times using mtDNA and nuclear gene regions following Schweizer et al. [57]:		Divergence times using mtDNA gene regions only following Schweizer et al. [57]:		Divergence times using mtDNA and nuclear gene regions following White et al. [58]:		Divergence times using mtDNA gene regions only following [58]:
Node number/ID:	Mean:	95% HPD (Mya):	Mean:	95% HPD (Mya):	Mean:	95% HPD (Mya):	Mean:	95% HPD (Mya):
a / Poicephalus	10.4	7.32–13.87	10.34	7.11–14.03	10.27	6.55–15.04	10.63	6.58–15.73
b / P. robustus clade	6.36	4.12–9.14	6.64	4.14–9.61	6.16	3.68–9.53	6.72	3.88–10.33
c / P. robustus ssp.	2.24	1.15–3.60	2.67	1.35–4.37	2.13	1.03–3.15	2.62	1.27–4.45
d / P. gulielmi ssp.	1.9	0.90–3.26	2.01	0.91–3.50	1.81	0.80–3.21	1.97	0.86–3.53
e / P. robustus population	1.23	0.52–2.16	1.44	0.60–2.63	1.16	0.48–2.11	1.4	0.55–2.61
f / P. r. suahelicus-fuscicollis	0.6	0.16–1.25	0.69	0.17–1.46	0.57	0.14–1.20	0.66	0.16–1.44