Table 2.

Rate and shape parameters estimated by Modeltest 3.7 for each of the four phylogenies presented in Figures. 3, 4, and 8

	Transition/transversion ratio		Kappa		Model		Shape parameter (α)
Phylogeny
Figure 2 M segment	-		-		GTR + Γ		0.1401
Figure 3 S segment	-		-		GTR + Γ		0.1675
Figure 8 M segment	7.7887		15.58		K80(K2P) + Γ		0.0004
Figure 8 S segment	-		-		GTR + Γ		0.1693
	Substitution rate matrix						Proportion of each nucleotide
Phylogeny	AC	AG	AT	CG	CT	GT	A	C	G	T
Figure 2 M segment	1.000	9.889	0.176	0.176	9.889	1.000	0.339	0.181	0.167	0.314
Figure 3 S segment	2.349	18.668	1.041	0.258	26.663	1.000	0.302	0.196	0.224	0.278
Figure 8 M segment	-	-	-	-	-	-	0.250	0.250	0.250	0.250
Figure 8 S segment	1.000	11.321	0.522	0.522	18.495	1.000	0.306	0.194	0.221	0.279