| Class | Order | Family | Genus | Species |
|---|---|---|---|---|
| Archaeoglobi | 2 | 2 | 5 | 70 |
| Candidatus Hadarchaeia | 1 | 1 | 1 | 14 |
| Candidatus Hikarchaeia | 1 | 1 | 1 | 11 |
| Candidatus Hydrothermarchaeia | 1 | 1 | 1 | 3 |
| Candidatus Methanofastidiosia | 1 | 1 | 1 | 3 |
| Candidatus Methanoliparia | 1 | 2 | 2 | 8 |
| Candidatus Nanohaloarchaea | 0 | 0 | 2 | 24 |
| Candidatus Poseidoniia | 1 | 2 | 2 | 350 |
| Candidatus Syntropharchaeia | 0 | 0 | 0 | 6 |
| Halobacteria | 2 | 11 | 91 | 3843 |
| Methanobacteria | 1 | 2 | 9 | 553 |
| Methanococci | 1 | 2 | 5 | 106 |
| Methanomicrobia | 6 | 15 | 44 | 1658 |
| Methanonatronarchaeia | 1 | 1 | 2 | 7 |
| Methanopyri | 1 | 1 | 1 | 11 |
| Methanosarcinia | 0 | 0 | 0 | 1 |
| Theionarchaea | 0 | 0 | 0 | 4 |
| Thermococci | 1 | 1 | 3 | 464 |
| Thermoplasmata | 6 | 8 | 19 | 341 |