Phylogeny of Desulfocapsa sulfexigens based on the 16S rRNA gene. The tree was inferred from maximum likelihood analysis (RAxML ) with sampling of 1330 aligned sequence positions. Tree searches were performed with the general time reversible evolutionary model with a gamma-distributed rate variation across sites. Scale bar, 10% estimated sequence divergence. Values at nodes are neighbor-joining-based bootstrap percentages, calculated with Jukes Cantor distance correction and 1,000 replications.