Phylogenetic tree of D. baculatum strain XT and all type strains of species within members of the family Desulfomicrobiaceae, inferred from 1,457 aligned characters [22,23] of the 16S rRNA gene sequence under the maximum likelihood criterion . The tree was rooted with all members from the Desulfonatronaceae, another family in the order Desulfovibrionales. 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%. Strains with a genome-sequencing project registered in GOLD  are printed in blue; published genomes in bold.