OrderThermoplasmatales
| Taxon: | Rank: |
| Cuniculiplasmataceae | family |
| Ferroplasmaceae | family |
| Picrophilaceae | family |
| Thermogymnomonas | genus |
| Thermoplasmataceae | family |
| Taxon: | Rank: |
| Cuniculiplasmataceae | family |
| Ferroplasmaceae | family |
| Picrophilaceae | family |
| Thermogymnomonas | genus |
| Thermoplasmataceae | family |