Relative Relations

Phylogenetic Tree of Bacteria courtesy of

To view this phylogenetic tree in high resolution and see how Legionella pneumophila is related to other organisms, click here.


Arrow found in Clip Art

Zoom of Phylogenetic Tree showing Legionella pneumophila and other Gamma Proteobacteria

This phylogenetic tree illustrates Legionella pneumophila's relationship to other bacteria.  Bacterial phyla are shown on the leaves, and the Firmicutes and the Proteobacteria are subdivided to the class level. Their phylogeny is again broken down to the order level.  Proteobacteria contain both important plant and animal pathogens. Proteobacterial plant pathogens are not clustered, but are observed in alpha, beta, and gamma subdivisions.  Phylogony for Legionella pneumophila is based on the 16s rRNA gene.

If you think Legionella pneumophila is interesting, you might enjoy learning about these other Gamma Proteobacteria as well: Escherichia coli, Pseudonmonas syringae, and Yersinia pestis!

Or if you'd like to learn more about a variety of organisms that fit diversely into the tree of life, visit!

To find out about the environments in which these bacteria reside go to the Water Worlds page!