RAxML phylogenetic tree of plastid 16S rDNA from photosynthetic Paulinella spp. with the larger tree (available upon request from HSY) removed at the branch leading to cyanobacteria. The numbers at the nodes show support values derived from a RAxML bootstrap analysis followed by those from a PhyML analysis. When both values are the same, then this is marked with an asterisk and when a node is not resolved with a method than this is denoted with dashes. Only bootstrap values ≥ 50% are shown. The thick branches have a Bayesian posterior probability > 0.95. Branch lengths are proportional to the number of substitutions per site (see scale bar).