| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium cellulovorans | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium cellulosi | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium celatum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium cavendishii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium carnis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium carboxidivorans | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium cadaveris | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium butyricum T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium budayi | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium bowmanii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium bovifaecis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium botulinum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium bornimense | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium beijerinckii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium beihaiense | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium baratii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium aurantibutyricum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium argentinense | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium arbusti | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium amylolyticum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium aminophilum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium amazonense | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium algoriphilum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium algifaecis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium algidicarnis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium akagii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium aestuarii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium aciditolerans | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium acidisoli | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Clostridium acetobutylicum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago |