FIG 2.

A phylogeny of all 1,522 SGBs. From innermost to outermost rings, the data mapped onto the phylogeny are GTDB phylum-level taxonomic classifications, class-level taxonomies for Actinobacteriota, class-level taxonomies for Firmicutes, class-level taxonomies for Proteobacteria, taxonomic novelty, significant enrichment in host gut or environmental metagenomes, and significant enrichment in mammals or other animals in our multispecies gut metagenome data set. The phylogeny was inferred from multiple conserved loci via PhyloPhlAn. Orange dots on the phylogeny denote bootstrap values in the range of 0.7 to 1. The phylogeny is rooted on the last common ancestor of Archaea and Bacteria.