Figure 4

Maximum-likelihood phylogeny of the 69-taxon RAG-1 data set. This data set was composed of up to 788 bp. Among the ingroup, 33 characters were parsimony-informative. Estimated ML model parameters conform to the GTR+G+I model of sequence evolution. -ln L = 1742.011947, rate matrix: A-C = 0.781722, A-G = 2.299258, A-T = 0.337743, C-G = 0.880761, C-T = 4.054761, G-T = 1. Base frequencies: A = 0.32, C = 0.23, G = 0.22, and T = 0.23, and γ-shape parameter = 0.2.501963. Proportion of invariable sites (I) = 0.462491. Thick branches indicate nodes with ≥ .95 BPP and ML and MP bootstrap values ≥ 70.