Table 3. Estimated dates and 95% highest posterior densities (HPD) of main nodes.

Node labels correspond to those in Fig 4.

Node	Event	Estimated age in mya (95% HPD)
1	Split between Aparallactinae and Atractaspidinae	29.1 (24.8–31.4)
2	Split between Homoroselaps and Atractaspis	27.2 (22.5–29.7)
3	Split between Homoroselaps dorsalis and H. lacteus	11.4 (5.3–16.8)
4	Basal divergence of Homoroselaps lacteus	6.0 (3.6–12.2)
5	Basal divergence of Atractaspis	26.4 (19.6–27.4)
6	Split between A. watsoni/A. microlepidota/A. sp. and A. micropholis/A. andersonii/A. cf. andersonii/A. engaddensis	14.8 (11.7–21.9)
7	Split between A. micropholis and A. cf. andersonii/A. engaddensis/A. andersonii	12.1 (7.8–17.6)
8	Split between A. cf. andersonii/A. engaddensis and A. andersonii	9.5 (5.7–14.4)
9	Split between A. cf. andersonii and A. engaddensis	6.0 (3.6–11.7)
10	Split between A. aterrima/A. boulengeri/A. reticulata and the remainder of Atractaspis	19.4 (16.1–23.7)
11	Split between A. aterrima and A. boulengeri/A. reticulata	13.2 (10.5–20.4)
12	Split between A. boulengeri and A. reticulata	11.7 (6.1–16.5)
13	Split between A. corpulenta/A. congica/A. dahomeyensis/A. irregularis and A. duerdeni/A. bibronii complex	16.8 (14.1–21.5)
14	Split between A. corpulenta/A. congica/A. dahomeyensis and A. irregularis	14.9 (12.1–19.6)
15	Split between A. corpulenta and A. dahomeyensis/A. congica	13.8 (10.2–17.6)
16	Split between A. corpulenta corpulenta and A. corpulenta kivuensis	3.6 (2.5–10.2)
17	Split between A. congica and A. dahomeyensis	10.4 (7.6–14.8)
18	Split between A. irregularis irregularis and A. cf. irregularis	10.5 (4.4–13.2)
19	Basal divergence of the A. bibronii complex	14.4 (10.1–18.3)
20	Split between A. cf. bibronii rostrata and A. duerdeni/A. bibronii rostrata	11.6 (7.6–15.7)
21	Split between A. bibronii rostrata and A. duerdeni	9.0 (5.8–13.4)
22	Basal divergence of A. bibronii	9.2 (5.6–12.9)