Phylogenetic tree highlighting the position of V. distributa IC-017T relative to the other type strains within the genus Vulcanisaeta and the type strains of the other genera within Thermoproteales. The tree was inferred from 1,356 aligned characters [16,17] of the 16S rRNA gene sequence under the maximum likelihood criterion  and rooted with the type strains of the genera of Desulfurococcales and Acidilobales. The branches are scaled in terms of the expected number of substitutions per site. Numbers above branches are support values from 150 bootstrap replicates  if larger than 60%. Lineages with type strain genome sequencing projects registered in GOLD  are shown in blue, published genomes [21–24] and INSDC accessions CP000504 and CP00852 in bold.