Eukaryotes (541)

 Prokaryotes (6109)

   Bacteria (5783)

   Archaea (326)

     Euryarchaeota (226)

     Crenarchaeota (71)

       Aeropyrum (2)

       Staphylothermus (2)

       Ignicoccus (2)

       Desulfurococcus (3)

       Thermosphaera (1)

       Ignisphaera (1)

       Thermogladius (1)

       Hyperthermus (1)

       Pyrolobus (1)

       Pyrodictium (1)

       Sulfurisphaera (2)

       Saccharolobus (5)

       Sulfolobus (15)

       Metallosphaera (5)

       Acidianus (5)

       Sulfodiicoccus (1)

       Stygiolobus (1)

       Sulfuracidifex (1)

       Pyrobaculum (8)

       Caldivirga (1)

       Thermoproteus (2)

       Vulcanisaeta (2)

       Thermofilum (4)

       Acidilobus (2)

       Caldisphaera (1)

       Fervidicoccus (1)

     Thaumarchaeota (18)

     Korarchaeota (1)

     Bathyarchaeota (2)

     Geothermarchaeota (1)

     Nanoarchaeota (2)

     Micrarchaeota (1)

     Lokiarchaeota (2)

     unclassified Archaea (2)