Neighbor-joining tree (82) based on nearly complete 16S rDNA sequences of gordoniae and representatives of other mycolic acid-containing actinomycetes, including members of the genera Corynebacterium, Dietzia, Mycobacterium, Nocardia, Rhodococcus, Skermania, Tsukamurella, and Williamsia. Numbers at nodes indicate the level of bootstrap support based on a neighbor-joining analysis of 1,000 resampled data sets; only values above 50% are given. Bar, 0.01 substitution per nucleotide position.