Phylogenetic tree highlighting the position of A. ferrooxidans strain ICPT relative to all other type strains within the Acidimicrobiales and the type strains of all other orders within the Actinobacteria. The tree was inferred from 1306 aligned characters [8,9] of the 16S rRNA gene under the maximum likelihood criterion  and rooted with Rubrobacteriales. The branches are scaled in terms of the expected number of substitutions per site. Numbers above branches are support values from 1000 bootstrap replicates if larger than 60%. Lineages with type strain genome sequencing projects registered in GOLD  are shown in blue, published genomes in bold.