| Name | Genomes | Species | Genera | Families | Orders |
| Archaea | 30,619 | 3,294 | 312 | 116 | 80 |
| · Archaea incertae sedis | 1 | 1 | 1 | 0 | 0 |
| · environmental samples <archaea,domain Archaea> | 788 | 5 | 0 | 0 | 0 |
| · Methanobacteriati | 13,985 | 2,275 | 189 | 49 | 28 |
| · Nanobdellati | 5,373 | 275 | 34 | 24 | 15 |
| · Promethearchaeati | 1,011 | 74 | 17 | 15 | 15 |
| · Thermoproteati | 8,796 | 607 | 71 | 28 | 22 |
| · unclassified Archaea | 665 | 57 | 0 | 0 | 0 |