OrderTissierellales
| Taxon: | Rank: |
| Acidilutibacteraceae | family |
| Dethiosulfatibacteraceae | family |
| Gottschalkiaceae | family |
| Peptoniphilaceae | family |
| Sedimentibacteraceae | family |
| Sporanaerobacteraceae | family |
| Thermohalobacteraceae | family |
| Tissierellaceae | family |
| Taxon: | Rank: |
| Acidilutibacteraceae | family |
| Dethiosulfatibacteraceae | family |
| Gottschalkiaceae | family |
| Peptoniphilaceae | family |
| Sedimentibacteraceae | family |
| Sporanaerobacteraceae | family |
| Thermohalobacteraceae | family |
| Tissierellaceae | family |