| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Methanospirillum stamsii | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanospirillum psychrodurum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanospirillum lacunae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanospirillum hungatei T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanospirillum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanospirillaceae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosphaerula palustris T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosphaerula | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosphaera stadtmanae T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosphaera cuniculi | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosphaera | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina vacuolata | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina thermophila | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina subterranea | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina spelaei | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina soligelidi | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina siciliae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina semesiae | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina mazei | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina lacustris | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina horonobensis | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina flavescens | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina barkeri T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina baltica | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina acetivorans | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosarcina | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosalsum zhilinae T | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosalsum natronophilum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosalsum | Unknown | Valid (ICNP) | Excubia bot over 4 years ago | |
| Methanosaeta harundinacea | Unknown | Valid (ICNP) | Excubia bot over 4 years ago |