Table 1. Definition and prior distribution of parameters used in the definition of the 25 tested scenarios.

	Parameter name	Distribution
		Type	Interval
Population effective sizes of the ancestral population	N	Uniform	{10–100 000}
Population leading to Brazilian population founder event	NOb	Uniform	{10–100 000}
Population leading to Equatorian population founder event	NOe	Uniform	{10–100 000}
Population leading to Guatemalan population founder event	NOgt	Uniform	{10–100 000}
Population leading to French Guyanian population founder event	NOgy	Uniform	{10–100 000}
Population leading to unsampled population founder event	NOu	Uniform	{10–100 000}
Bottleneck during founder event of Brazilian population	NBb	Log-uniform	{1–100}
Bottleneck during founder event of Equatorian population	NBe	Log-uniform	{1–100}
Bottleneck during founder event of Guatemalan population	NBgt	Log-uniform	{1–100}
Bottleneck during founder event of French Guiana population	NBgy	Log-uniform	{1–100}
Bottleneck during founder event of unsampled population	NBu	Log-uniform	{1–100}
Brazilian population	Nb	Uniform	{10–100 000}
Equatorian population	Ne	Uniform	{10–100 000}
Guatemalan population	Ngt	Uniform	{10–100 000}
French Guiana population	Ngy	Uniform	{10–100 000}
Unsampled population	Nu	Uniform	{10–100 000}
Time of the ancestral divergence in source population	TO	Uniform	{600–100 000}
Founder event of the Brazilian population	TFb	Log-uniform	{16–500}
Founder event of the Equatorian population	TFe	Log-uniform	{16–500}
Founder event of the Guatemalan population	TFgt	Log-uniform	{16–500}
Founder event of the French Guiana population	TFgy	Log-uniform	{16–500}
Founder event of the unsampled population	TFu	Log-uniform	{16–500}
Secondary founder event of Brazilian population	TSb	Log-uniform	{16–500}
Secondary founder event of Equatorian population	TSe	Log-uniform	{16–500}
Secondary founder event of Guatemalan population	TSgt	Log-uniform	{16–500}
Secondary founder event of French Guiana population	TSgy	Log-uniform	{16–500}
Admixture event	TA	Log-uniform	{16–500}
Rate of admixture	ra	Uniform	{0.001–0.999}
Mutation model parameters
Mean mutation rate	Mμmic	Uniform	{10−4–10−3}
Mean parameter of the geometric distribution of the number of repeats	MP	Uniform	{0.1–0.3}
Mean single nucleotide insertion/deletion mutation rate	Mμsni	Log-uniform	{10−8–10−4}