Fig. 1

Habitat and phylogenetic positioning of “Ca. Homeothermaceae” (S24-7). a Habitat source of 16S rRNA gene sequences described in the Silva database [9] belonging to members of the Bacteroidales order. Written percentages indicate the proportion of homeothermic animal samples which were derived from the gastrointestinal tract (GIT) for families dominated by homeothermic samples. Note that families in this panel have been reclassified according to the genome tree (panel b). b A maximum-likelihood tree of “Ca. Homeothermaceae” population genomes based on alignment of 120 concatenated marker genes. Bootstrap support derived from 100 replicates. Genome identifiers indicate host from which genome was recovered: human (H), mouse (M), guinea pig (GP), or koala (K). The metabolic focus, as determined by carbohydrate active gene annotations, is indicated by colored triangles following each population genome