| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Arenibacter arenosicollis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arenibacter aquaticus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arenibacter antarcticus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arenibacter amylolyticus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arenibacter | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arenibacillus arenosus T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arenibacillus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Ardenticatena maritima T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Ardenticatena | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Ardenticatenaceae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Ardenticatenales | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Ardenticatenia | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticiflavibacter luteus T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticiflavibacter | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticibacterium luteifluviistationis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticibacterium | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticibacter tournemirensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticibacter svalbardensis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticibacter pallidicorallinus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticibacter eurypsychrophilus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcticibacter | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter venerupis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter trophiarum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter thereius | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter suis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter skirrowii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter pacificus | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter nitrofigilis T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter mytili | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Arcobacter molluscorum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago |