| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Archaeoglobales | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Archaeoglobi | ||||
| Arcanobacterium wilhelmae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium pluranimalium | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium pinnipediorum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium phocisimile | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium phocae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium hippocoleae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium haemolyticum T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium canis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium bovis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arcanobacterium | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arboricoccus pini T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arboricoccus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Geminicoccaceae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arachnia rubra | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arachnia propionica T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arachnia | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arachidicoccus soli | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arachidicoccus rhizosphaerae T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arachidicoccus ginsenosidivorans | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Arachidicoccus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Aquitalea pelogenes | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Aquitalea magnusonii T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Aquitalea denitrificans | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Aquitalea aquatilis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Aquitalea | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Aquisphaera giovannonii T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Aquisphaera | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Isosphaeraceae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago |