| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium manihotivorum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium malenominatum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium magnum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium luticellarii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium lundense | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium ljungdahlii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium liquoris | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium leptum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium lacusfryxellense | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium kluyveri | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium jeddahense | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium isatidis | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium intestinale | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium innocuum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium indicum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium hylemonae | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium hydrogeniformans | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium huakuii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium homopropionicum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium herbivorans | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium haemolyticum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium guangxiense | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium grantii | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium gasigenes | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium ganghwense | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium fungisolvens | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium frigoris | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium frigidicarnis | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium formicaceticum | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago | |
| Clostridium fimetarium | Unknown | Valid (ICNP) | Excubia bot almost 5 years ago |