Phylogenetic tree of S. thermophilus strain S 6022T and all type strains of the phylum Chloroflexi, inferred from 1,304 aligned characters [5,6] of the 16S rRNA gene sequence under the maximum likelihood criterion . The tree was rooted with the members of Anaerolineae and Caldilineae within the Chloroflexi. The branches are scaled in terms of the expected number of substitutions per site. Numbers above branches are support values from 1,000 bootstrap replicates if larger than 60%. Lineages with type strain genome sequencing projects registered in GOLD  are shown in blue, published genomes in bold.