Table 1. Summary of taxon sampling and best-fitting models for combined and individual genes, taxa, and characters.

Gene/Codon position	Taxa	Number of characters	Best-fitting model	AIC corrected value	– ln Likelihood	I	G	C	V	PI	S
All data	36	1997	GTR+I+G	15043	7438	0.32	0.50	1280	699	367	325
12S	16	763	GTR+G	5446	2682	n/d	0.37	473	280	121	153
16S	31	564	GTR+G	3952	1897	n/d	0.23	389	175	90	84
COI	28	670	HKY+I	5374	2620	0.59	n/d	418	244	156	88
COI, 1st		223	TrNef+I	1393	616	0.69	n/d	177	44	24	20
COI, 2nd		223	F81	862	350	n/d	n/d	211	9	4	5
COI, 3rt		224	HKY	2874	1355	n/d	n/d	30	191	128	63

Evolution models were evaluated by comparisons of the Akaike Information Criteria (AICc). I = Proportion of invariable sites; G = Gamma distribution; C = Conserved sites; V = Variable sites; PI = Parsimony-Informative sites; S = Singleton sites. Outgroup species correspond to Craugastor longirostris, Oreobates cruralis and Pristimantis crucifer.