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. Author manuscript; available in PMC: 2014 May 19.
Published in final edited form as: Nature. 2011 Feb 10;470(7333):255–258. doi: 10.1038/nature09676

Figure 2. Animal phylogeny based on mitochondrial proteins reconstructed using the CAT + GTR + Γ model under a Bayesian analysis.

Figure 2

Xenoturbella and the four acoel species are sister taxa (PP = 0.99). This clade is grouped with the deuterostomes (PP = 0.99), but is excluded from within the clade with weak support (PP = 0.47). Cross-validation demonstrates that the GTR + Γ model has a better fit than the CAT + Γ model, albeit without statistical significance (ΔlnL = 20 ± 24), and that the CAT + GTR + Γ model has a significantly better fit than the GTR + Γ model (ΔlnL = 96 ± 21). Using less fit models (GTR + Γ and CAT + Γ), the support for association with the deuterostomes decreases (Supplementary Fig. 1). Scale bar, substitutions per position.