Phylogenetic positions of Chlorokybus and Mesostigma as inferred from chloroplast small and large subunit rRNA genes. The Chlorokybus rRNA gene sequences were added to a data set previously analyzed by Turmel et al.  and phylogenetic analyses of the resulting data set (4,072 sites) were carried out essentially as described in the Methods, except that the TrN+Γ+I model was used. The best ML tree is shown. The nodes that received 100% bootstrap support in ML, MP, ML-distance and LogDet-distance analyses are denoted by asterisks. For the other nodes, only the bootstrap values ≥50% are indicated; the values obtained in ML, MP, ML-distance, and LogDet-distance analyses are listed in this order from left to right.