| Order | Family | Genus | Species |
|---|---|---|---|
| Candidatus Caldarchaeales | 2 | 3 | 16 |
| Candidatus Cenarchaeales | 1 | 1 | 20 |
| Candidatus Nitrosocaldales | 1 | 2 | 10 |
| Candidatus Nitrosomirales | 0 | 0 | 1 |
| Conexivisphaerales | 1 | 1 | 4 |
| Nitrosopumilales | 1 | 6 | 152 |
| Nitrososphaerales | 2 | 3 | 57 |
| Nitrosotaleales | 1 | 1 | 8 |