| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Cognaticolwellia | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognaticolwellia sediminilitoris | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognaticolwellia mytili | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognaticolwellia beringensis | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognaticolwellia aestuarii | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognatazoarcus | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognatazoarcus halotolerans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognataquiflexum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognataquiflexum rubidum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognataquiflexum nitidum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cognataquiflexum aquatile | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cochlodiniinecator | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Cochlodiniinecator piscidefendens | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium zeae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium xylanovorans | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium xylanolyticum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium weizhouense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium villosum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium ventriculi | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium ultunense | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermosulfurogenes | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermosulfurigenes | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermosaccharolyticum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermopapyrolyticum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermolacticum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermohydrosulfuricum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermocopriae | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermocellum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermoautotrophicum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago | |
| Clostridium thermoaceticum | Unknown | Valid (ICNP) | Excubia bot over 1 year ago |