Eukaryotes (220)

 Prokaryotes (2721)

   Bacteria (2559)

   Archaea (162)

     Euryarchaeota (104)

       Methanocaldococcus (5)

       Methanotorris (1)

       Methanococcus (8)

       Methanothermococcus (1)

       Methanosarcina (4)

       Methanococcoides (1)

       Methanohalophilus (1)

       Methanohalobium (1)

       Methanosalsum (1)

       Methanolobus (1)

       Methanomethylovorans (1)

       Methanosaeta (3)

       Methanospirillum (1)

       Methanocorpusculum (1)

       Methanoculleus (2)

       Methanoplanus (1)

       Methanoregula (2)

       Methanosphaerula (1)

       Methanocella (3)

       Methanomassiliicoccus (1)

       Methanothermobacter (2)

       Methanosphaera (1)

       Methanobrevibacter (3)

       Methanobacterium (2)

       Methanothermus (1)

       Methanopyrus (1)

       Methanomethylophilus (1)

       Archaeoglobus (4)

       Ferroglobus (1)

       Halobacterium (2)

       Haloarcula (2)

       Haloquadratum (2)

       Natronomonas (2)

       Halorubrum (1)

       Halorhabdus (2)

       Halomicrobium (1)

       Haloterrigena (1)

       Natrialba (1)

       Haloferax (2)

       Halalkalicoccus (1)

       Halogeometricum (1)

       Halopiger (1)

       Natrinema (2)

       Natronobacterium (1)

       Halovivax (1)

       Natronococcus (1)

       Salinarchaeum (1)

       Thermoplasma (2)

       Picrophilus (1)

       Ferroplasma (1)

       Unclassified Thermoplasmatales (1)

       Pyrococcus (7)

       Thermococcus (9)

       Aciduliprofundum (2)

     Crenarchaeota (49)

     Thaumarchaeota (6)

     Nanoarchaeota (1)

     Korarchaeota (1)

     Unclassified (1)