| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Arthrobacter cryotolerans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter creatinolyticus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter chlorophenolicus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter cheniae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter cavernae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter bergerei | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter aurescens | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter atrocyaneus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter arilaitensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter ardleyensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter antioxidans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter antarcticus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter albus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arthrobacter albidus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arsukibacterium tuosuense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arsukibacterium perlucidum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arsukibacterium indicum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arsenophonus apicola | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arsenicicoccus cauae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Aristophania | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Aristophania vespae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arcobacter vitoriensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arcobacter vandammei | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arcobacter parvus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arcobacter lekithochrous | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arcobacter haliotis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arcobacter arenosus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arcobacter antarcticus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Archaeoglobus neptunius | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Arcanobacterium pyogenes | Unknown | Valid (ICNP) | Excubia bot over 1 year ago |