Phylogenetic tree highlighting the position of H. praevalens GSLT relative to the other type strains within the family Halanaerobiaceae. The tree was inferred from 1,460 aligned characters [15,16] of the 16S rRNA gene sequence under the maximum likelihood criterion  and rooted in accordance with the current taxonomy. The branches are scaled in terms of the expected number of substitutions per site. Numbers to the right of bifurcations are support values from 1,000 bootstrap replicates  if larger than 60%. Lineages with type strain genome sequencing projects registered in GOLD  are labeled with an asterisk, published genomes with two asterisks .