| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium carboxidivorans | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium cadaveris | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium butyricum T | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium budayi | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium bowmanii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium bovifaecis | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium botulinum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium bornimense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium beijerinckii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium beihaiense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium baratii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium aurantibutyricum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium argentinense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium arbusti | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium amylolyticum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium aminophilum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium amazonense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium algoriphilum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium algifaecis | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium algidicarnis | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium akagii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium aestuarii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium aciditolerans | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium acidisoli | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium acetobutylicum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium acetireducens | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium aceticum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridioides mangenotii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridioides difficile T | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago |