Estimated dates of origin for each of the identified clusters.

Estimates marked in bold correspond to the estimates from the “best fitting” model as was determined through Bayes Factor calculation following 1000 replicates.Relax – Relax molecular clock; Strict – Strict molecular clock; ESS – Effective Sample Size; HPD – Highest Posterior Density; BSP – Bayesian Skyline Plot tree prior; Const – Constant population size tree prior; Expo – Exponential growth tree prior; est – estimated mutation rate; fix – fixed mutation rate.Estimated dates of origin for each of the identified clusters.