Phylogenetic tree highlighting the position of S. glycolicus relative to the type strains of the most closely related genera within the family Peptococcaceae. The tree was inferred from 1,306 aligned characters [13,14] of the 16S rRNA gene sequence under the maximum likelihood (ML) criterion  and rooted with the type species of the family. The branches are scaled in terms of the expected number of substitutions per site. Numbers adjacent to the branches are support values from 700 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, those also listed as ‘Complete and Published’ with two asterisks [19–21].