Table 5.

Prior distributions used for all ABC analyses.

Description	Prior distribution
Mutation Parameters
Mutation model	HKY	10% invariant sites		Shape (2)
Mean mutation rate	Uniform	(min) 1.00E-7	(max) 1.00E-5
Indiv. locus mutation rate	Gamma	(min) 1.00E-7	(max) 1.00E-5	Shape (2)
Mean coefficient (k C/T)	Uniform	(min) 1.5	(max) 20
Indiv. locus coefficient (k C/T)	Gamma	(min) 1.5	(max) 20	Shape (2)

Mutation parameters refer to selected DNA mutation model, distributions used, and bounds for said distributions within the model validation screen.