| Name | Class | Order | Family | Genus |
|---|---|---|---|---|
| Methanospirillum hungatei | Methanomicrobia | Methanomicrobiales | Methanospirillaceae | Methanospirillum |
| Methanospirillum lacunae | Methanomicrobia | Methanomicrobiales | Methanospirillaceae | Methanospirillum |
| Methanospirillum psychrodurum | Methanomicrobia | Methanomicrobiales | Methanospirillaceae | Methanospirillum |
| Methanospirillum stamsii | Methanomicrobia | Methanomicrobiales | Methanospirillaceae | Methanospirillum |