| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Methanosarcina frisia | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanosaeta thermophila | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanosaeta thermoacetophila | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanosaeta concilii T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanoplanus petrolearius | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanomicrococcus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanomicrococcus blatticola T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanomicrobium paynteri | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanolobus siciliae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanohalophilus zhilinae | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanohalophilus profundi | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanohalophilus oregonensis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanohalophilus oregonense | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanohalobium evestigatus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium thermophilicum | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium tationis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium tatii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium olentangyi | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium marisnigri | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium liminatans | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium frittonii | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium bourgense | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanogenium aggregans | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanoculleus thermophilicus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanoculleus olentangyi | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanoculleus oldenburgensis | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanoculleus bourgense | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanocorpusculum parvum T | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanococcus vulcanius | Unknown | Valid (ICNP) | Excubia bot about 3 years ago | |
| Methanococcus thermolithotrophicus | Unknown | Valid (ICNP) | Excubia bot about 3 years ago |