Phylogeny of the tuf gene region used in this study. (A) Phylogeny based on tuf genes from >9000 staphylococcal genomes with tuf gene ASVs in each staphylococcal species shown in parenthesis. (B) Amplicon sequencing of tuf genes from a staphylococcal mock community composed of equal amounts of genomic DNA from Staphylococcus aureus, Staphylococcus capitis, Staphylococcus epidermidis, Staphylococcus hominis, Staphylococcus lugdunensis, and Staphylococcus pseudintermedius in ≈100,000 copies/organism (left) diluted down to ≈1 copy/organism (right). Error bars indicate highest and lowest observation in each technical triplicate experiment.