Phylogenetic tree highlighting the position of R. mesophilum relative to the type strains of the other species within the genus Rubellimicrobium and the neighboring genera Citreicella and Wenxinia. The tree was inferred from 1,381 aligned characters of the 16S rRNA gene sequences under the maximum likelihood (ML) criterion as previously described . The branches are scaled in terms of the expected number of substitutions per site. Numbers adjacent to the branches are support values from 1,000 ML bootstrap replicates (left) and from 1,000 maximum-parsimony bootstrap replicates (right) if larger than 60% . Lineages with type strain genome sequencing projects registered in GOLD  are labeled with one asterisk .