| Divergence times using fossil calibration point | Divergence times using fixed mean substitution rate |
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Node: | Mean | 95Â % HPD (Mya) | Mean | 95Â % HPD (Mya) |
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Clade A | 5.80 | 2.24–13.93 | 4.20 | 1.97–13.73 |
H. vittatus
| 4.75 | 2.01–11.09 | 3.68 | 1.80–10.88 |
H. gigas
| 4.16 | 1.77–9.68 | 3.17 | 1.50–9.00 |
Clade B & C. | 3.38 | 1.32–8.48 | 2.55 | 1.15–7.99 |
- Two molecular clock analyses were conducted. Fossil-calibrated values were estimated using a Bayesian lognormal relaxed-clock model, while the substitution rate calibrated values were estimated using the strict molecular clock model using a fixed mean substitution rate of 1.30 X 10−8 subs/site/year. The mean estimated values and the 95 % highest posterior density (HPD) ranges are given for the two molecular clocks. See Fig. 2 for the corresponding maximum clade probability trees