| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium sardiniense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium saccharoperbutylacetonicum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium saccharogumia | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium saccharobutylicum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium roseum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium ramosum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium quinii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium putrefaciens | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium puniceum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium punense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium psychrophilum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium prolinivorans | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium populeti | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium polysaccharolyticum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium polyendosporum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium piliforme | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium phytofermentans | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium perfringens | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium peptidivorans | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium pasteurianum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium pascui | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium paraputrificum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium paradoxum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium pabulibutyricum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium oryzae | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium oceanicum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium novyi | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium nitrophenolicum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium nitritogenes | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium nexile | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago |