Tree	No. of sequences	Length of alignment	Proportion of pair bases	Substitution model	Value of ln	
Trematoda	32	1166	A = 0.218 C = 0.213
G = 0.304 T = 0.265	GTR	-6543.844894	
Cestoda	70	2117	A = 0.204 C = 0.231
G = 0.337 T= 0.228	GTR+CAT	-14010.250786	
Syphacia	21	1226	A = 0.248 C = 0.209
G = 0.292 T = 0.251	GTR	-5760.558265	
Strongylida	37	943	A = 0.255 C = 0.203 G=0.296 T = 0.245	GTR	-3056.083831	
Table S2. Description of each data set used for the phylogenetic analyses.