| Order | Family | Genus | Species |
|---|---|---|---|
| Candidatus Anstonellales | 2 | 2 | 6 |
| Candidatus Burarchaeales | 1 | 1 | 4 |
| Candidatus Fermentimicrarchaeales | 1 | 1 | 2 |
| Candidatus Gugararchaeales | 1 | 1 | 1 |
| Candidatus Micrarchaeales | 1 | 1 | 6 |
| Candidatus Norongarragalinales | 1 | 1 | 3 |
| Microcaldales | 1 | 1 | 1 |