Eukaryotes (396)

 Prokaryotes (4543)

   Bacteria (4290)

   Archaea (253)

     Euryarchaeota (168)

     Crenarchaeota (60)

       Aeropyrum (2)

       Staphylothermus (2)

       Ignicoccus (2)

       Desulfurococcus (3)

       Thermosphaera (1)

       Ignisphaera (1)

       Thermogladius (1)

       Hyperthermus (1)

       Pyrolobus (1)

       Pyrodictium (1)

       Sulfolobus (21)

       Metallosphaera (2)

       Acidianus (2)

       Pyrobaculum (8)

       Caldivirga (1)

       Thermoproteus (2)

       Vulcanisaeta (2)

       Thermofilum (4)

       Acidilobus (1)

       Caldisphaera (1)

       Fervidicoccus (1)

     Thaumarchaeota (15)

     Nanoarchaeota (2)

     Nanohaloarchaeota (1)

     Korarchaeota (1)

     Bathyarchaeota (2)

     Lokiarchaeota (1)

     Unclassified Archaea (3)