| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium colinum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium colicanis | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium cocleatum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium cochlearium | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium chromiireducens | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium chauvoei | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium chartatabidum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium cellulovorans | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium cellulosi | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium celatum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium cavendishii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium carnis | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| 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 |