| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Abiotrophia defectiva | 1 | 2 | HMP |
| Acaryochloris marina | 1 | 2 | HMP |
| Acetivibrio ethanolgignens | 1 | 2 | MGYG |
| Acetivibrio thermocellus | 2 | 8 | HMP |
| Acetobacter pasteurianus | 1 | 28 | HMP |
| Acetohalobium arabaticum | 1 | 1 | HMP |
| Acetomicrobium hydrogeniformans | 2 | 2 | HMP/MGYG |
| Acholeplasma laidlawii | 1 | 16 | HMP |
| Achromobacter piechaudii | 1 | 7 | HMP |
| Achromobacter xylosoxidans | 1 | 142 | MGYG |