| Genus | Species Num | Strain Num | SOURCE |
|---|---|---|---|
| Alloprevotella | 1 | 2 | HMP/MGYG |
| Alloscardovia | 1 | 1 | MGYG |
| Amedibacillus | 1 | 2 | HMP/MGYG |
| Aminobacterium | 1 | 1 | HMP |
| Ammonifex | 1 | 1 | HMP |
| Amycolatopsis | 1 | 1 | HMP |
| Anaerobiospirillum | 1 | 1 | MGYG |
| Anaerobutyricum | 1 | 3 | HMP/MGYG |
| Anaerococcus | 9 | 14 | HMP/MGYG |
| Anaerocolumna | 1 | 1 | MGYG |