| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium fungisolvens | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium frigoris | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium frigidicarnis | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium formicaceticum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium fimetarium | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium fessum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium fermenticellae | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium felsineum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium fallax | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium estertheticum subsp. laramiense | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium estertheticum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium estertheticum subsp. estertheticum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium drakei | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium disporicum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium cylindrosporum | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium composti | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium combesii | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| Clostridium collagenovorans | Unknown | Valid (ICNP) | Excubia bot almost 3 years ago | |
| 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 |