| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Methanohalophilus profundi | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanohalophilus oregonensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanohalophilus oregonense | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanohalobium evestigatus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium thermophilicum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium tationis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium tatii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium olentangyi | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium marisnigri | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium liminatans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium frittonii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium bourgense | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanogenium aggregans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanoculleus thermophilicus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanoculleus olentangyi | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanoculleus oldenburgensis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanoculleus bourgense | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanocorpusculum parvum T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus vulcanius | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus thermolithotrophicus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus mazei | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus jannaschii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus infernus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus igneus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus halophilus | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus frisius | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus fervens | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcus deltae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcoides vulcani | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Methanococcoides orientis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago |