Figure 1.

Phylogenetic tree highlighting the position of S. novella relative to the type strains of the other species within the family Xanthobacteraceae (blue font color). The tree was inferred from 1,381 aligned characters [34,35] of the 16S rRNA gene sequence under the maximum likelihood (ML) criterion [36]. Hyphomicrobiaceae (green font color for those species that caused conflict according to the Parafit test, black color for the remaining ones; see below for the difference) were included in the dataset for use as outgroup taxa but then turned out to be intermixed with the target family; hence, the rooting shown was inferred by the midpoint-rooting method [29]. The branches are scaled in terms of the expected number of substitutions per site. Numbers adjacent to the branches are support values from 550 ML bootstrap replicates [37] (left) and from 1,000 maximum-parsimony bootstrap replicates [38] (right) if larger than 60%. Lineages with type strain genome sequencing projects registered in GOLD [39] are labeled with one asterisk, those also listed as ‘Complete and Published’ with two asterisks (see [40] and CP000781 for Xanthobacter autotrophicus, CP002083 for Hyphomicrobium denitrificans and CP002292 for Rhodomicrobium vannielii).