| Name | Class | Order | Family | Genus |
|---|---|---|---|---|
| Methanoculleus bourgensis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus chikugoensis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus horonobensis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus hydrogenitrophicus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus marisnigri | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus palmolei | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus receptaculi | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus sediminis | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus submarinus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |
| Methanoculleus thermophilus | Methanomicrobia | Methanomicrobiales | Methanomicrobiaceae | Methanoculleus |