| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Achlamydosporeae | 1 | 0 | 0 |
| Aciculata | 0 | 0 | 0 |
| Acidobacteria | 1 | 2 | 0 |
| Acidobacteriaceae | 1 | 0 | 0 |
| Acidobacteriales | 1 | 0 | 0 |
| Acidobacterium | 0 | 2 | 0 |
| Acilius | 1 | 0 | 0 |
| Acilius (Acilius) sulcatus (Linnaeus 1758) | 0 | 2 | 0 |
| Acinetosporaceae | 0 | 0 | 0 |
| Acinonyx Brookes 1828 | 1 | 0 | 0 |
| Acinonyx jubatus (Schreber 1775) (cheetah) | 0 | 2 | 0 |
| Acinos | 1 | 2 | 0 |
| Clinopodium acinos (L.) Kuntze (basil thyme) | 0 | 2 | 0 |
| Acipenser | 1 | 0 | 0 |
| Acipenser baerii Brandt 1869 (Siberian Sturgeon) | 0 | 2 | 0 |
