| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| 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 | |
| Acetomicrobium faecale | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetogenium | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetogenium kivui T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetofilamentum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetofilamentum rigidum T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter xylinus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter xylinus subsp. xylinus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter xylinus subsp. sucrofermentans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter xylinum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter xylinum subsp. xylinum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter xylinum subsp. sucrofermentans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter vaccinii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter suratthanensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter persicus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter peroxydans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter pasteurianus subsp. pasteurianus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter pasteurianus subsp. lovaniensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter pasteurianus subsp. estunensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter pasteurianus subsp. ascendens | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter oboediens | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter methanolicus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter liquefaciens | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Acetobacter intermedius | Unknown | Valid (ICNP) | Excubia bot over 3 years ago |