| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Clostridium weizhouense | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium villosum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium ventriculi | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium ultunense | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermosulfurogenes | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermosulfurigenes | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermosaccharolyticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermopapyrolyticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermolacticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermohydrosulfuricum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermocopriae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermocellum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermoautotrophicum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermoaceticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermautotrophicum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thermaceticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium thailandense | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium termitidis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium sufflavum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium straminisolvens | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium sticklandii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium stercorarium | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium stercorarium subsp. thermolacticum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium stercorarium subsp. stercorarium | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium stercorarium subsp. leptospartum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium sphenoides | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium sordellii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium simiarum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium saudii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Clostridium sartagoformum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago |