| Genus | Species Num | Strain Num | SOURCE |
|---|---|---|---|
| Peptoniphilus | 11 | 15 | HMP/MGYG |
| Peptostreptococcus | 3 | 5 | HMP/MGYG |
| Peribacillus | 1 | 1 | MGYG |
| Persephonella | 1 | 1 | HMP |
| Petrotoga | 1 | 1 | HMP |
| Phaeobacter | 1 | 1 | HMP |
| Phascolarctobacterium | 2 | 3 | MGYG |
| Phenylobacterium | 1 | 1 | HMP |
| Phocaeicola | 9 | 17 | HMP/MGYG |
| Phocea | 1 | 1 | MGYG |