Table 2.
Summary of the prior and posterior ages for the constrained nodes
| Constrained nodes | Split | Minimum age of fossil constraint | Median posterior (calculated age) | 95% HPD lower | 95% HPD upper |
|---|---|---|---|---|---|
| X |
Archosauromorpha–Lepidosauromorpha |
255 |
271 |
259 |
285.2 |
| Y |
Crown Archosauria sensu stricto |
247 |
248.3 |
247 |
252.8 |
| 1 |
Sphenodon–Varanus (Lepidosauria) |
238 |
240.8 |
238 |
249.6 |
| 2 |
Eublepharis–Sphaerodactylus (Gekkonidae) |
44 |
50.5 |
44 |
63.3 |
| 3 |
Xantusia–Cordylus |
61 |
67 |
61 |
84.3 |
| 4 |
Lacertidae–Amphisbaenia |
61 |
66.1 |
61 |
80.9 |
| 5 |
Python–Elgaria (Anguimorpha) |
148 |
150.3 |
148 |
156.8 |
| 6 |
Varanus–Lanthanotus |
48 |
50.5 |
48 |
58.3 |
| 7 |
Heloderma–Anniella |
98 |
100.4 |
98 |
108 |
| 8 |
Elgaria–Ophisaurus |
33 |
35.3 |
33 |
42.1 |
| 9 |
Chamaeleo–Calumma (chameleons) |
19 |
21.8 |
19 |
29.6 |
| 10 |
Physignatus–Ctenophorus |
16 |
18.9 |
16 |
26.9 |
| 11 |
Gambelia–Anolis |
48 |
50.5 |
48 |
58 |
| 12 | Shinisaurus–Elgaria | 128 | 129.6 | 128 | 134.4 |
The minimum ages of the fossils were used as hard bounds, and prior ages set as exponentially distributed with a mean = 4.0. The posterior (calculated) ages are listed as median, 95% HDP lower and 95% HDP upper.