Fig 1.

16S rRNA gene phylogeny of the MAR4 clade. The maximum likelihood (ML) phylogeny includes all cultured MAR4 strains and a representative from each OTU (Fig. 2) that contains only cloned sequences. Sequences are identified by NCBI accession number followed by the strain number and source, when available. Sequences added to the NCBI database as a result of this study are indicated in bold. * and ** indicate that the clades represented by the S. aculeolatus and S. synnematoformans type strains, respectively. Maximum likelihood and maximum parsimony (MP) trees had no conflicting nodes. Bootstrap (maximum likelihood) and jackknife (maximum parsimony) values higher than 50% are indicated.