FIG. 1.

Phylogenetic tree showing the relationships of bacterial 16S rRNA gene sequences to one another and to known microbial groups using 1,573 aligned characters. Nodal support values with bootstrap support (100 replicates) and posterior probabilities (10⁷ generations), respectively, are listed next to the branches of the unrooted maximum likelihood tree (ln L = −4,404.18186 [TrNef+I+Γ model]; p_inv = 0.512289; α = 0.599910). Line length, 0.1 substitutions/site; DRV, desert rock varnish isolate. Accession numbers are shown in boldface type or in parentheses.