| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Acidovorax avenae subsp. avenae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidithrix | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidithrix ferrooxidans T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidithiobacillus concretivorus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidithiobacillus albertis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidisoma silvae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidisoma cellulosilyticum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidisoma cellulosilytica | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidisarcina | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidisarcina polymorpha T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidiphilium facilis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidiphilium facile | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidiphilium aminolytica | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidiphilium aminilyticum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidimangrovimonas indica | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidihalobacter prosperus T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidicaldus organivorus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acidaminococcus hominis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Achromobacter xylosoxidans subsp. xylosoxidans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Achromobacter xylosoxidans subsp. denitrificans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Achromobacter spiritinus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Achromobacter sediminum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Achromatium | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Achromatium oxaliferum T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acholeplasma seiffertii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acholeplasma florum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acholeplasma entomophilum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetothermus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetothermus paucivorans T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetomicrobium faecalis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago |