| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Risungbinella massiliensis | 1 | 2 | MGYG |
| Robertmurraya massiliosenegalensis | 1 | 2 | MGYG |
| Robiginitalea biformata | 1 | 1 | HMP |
| Robinsoniella peoriensis | 1 | 4 | MGYG |
| Romboutsia timonensis | 1 | 1 | MGYG |
| Roseburia faecis | 1 | 13 | MGYG |
| Roseburia hominis | 1 | 8 | MGYG |
| Roseburia intestinalis | 2 | 17 | HMP/MGYG |
| Roseburia inulinivorans | 2 | 14 | HMP/MGYG |
| Roseibium aggregatum | 1 | 11 | HMP |