FIG. 2.

Phylogenetic affinity between Ascogregarina and Cryptosporidium as inferred from LSU rRNA genes (29 taxa and 1,971-nt positions) using BI with MrBayes, ML bootstrapping analysis with Treefinder and site-heterogeneous CAT with PhyloBayes methods. Both BI and ML analyses used a GTR model with the consideration of four-rate gamma and the faction of invariance and yielded the same topology. The CAT method produced a similar topology except that the relationships of some species within the apicomplexan and dinoflagellate clusters were not fully resolved under the majority ruling law (as indicated by an “x”). Solid circles indicate nodes that are supported by all three methods at 95% level or higher.