Figure 2.

Phylogenetic tree of 16S rRNA gene sequences from Iron Mountain community genome sequencing (red) and selected sequences from cultivated organisms. Ferroplasma types I/II are not shown due to their near-identical sequences to F. acidarmanus. Sequences for which only partial coverage of the 16S rRNA gene was obtained are not shown, including ARMAN-5, a gammaproteobacterium, additional Actinobacteria, and Sulfobacillus-like sequences.