| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Sediminispirochaeta smaragdinae | 1 | 1 | HMP |
| Segniliparus rotundus | 1 | 1 | HMP |
| Selenomonas bovis | 1 | 3 | MGYG |
| Selenomonas flueggei | 1 | 1 | HMP |
| Selenomonas noxia | 1 | 2 | HMP |
| Selenomonas sp. oral taxon 149 | 1 | 1 | HMP |
| Selenomonas sputigena | 1 | 2 | HMP |
| Sellimonas intestinalis | 1 | 16 | MGYG |
| Senegalimassilia anaerobia | 1 | 3 | MGYG |
| Serratia liquefaciens | 1 | 25 | MGYG |