procaryotes
Count: -
   Domain Archaea Woese et al. 1990
  Count: [g] 2p;8c;12o;20f;68g
     Phylum Crenarchaeota Garrity and Holt 2001
    Count: [g] 1c;3o;5f;22g
       Class Thermoprotei Reysenbach 2001 nom. inval. see Class Thermoprotei Reysenbach 2002
      Count: [g] 3o;5f;22g
         Order Sulfolobales Stetter 1989
        Count: [g] 1f;6g
           Family Sulfolobaceae Stetter 1989
          Count: [g] 6g
             1 Genus Sulfolobus Brock et al. 1972 (Approved Lists 1980)
            Count: -
             2 Genus Acidianus Segerer et al. 1986
            Count: -
             3 Genus Metallosphaera Huber et al. 1989
            Count: -
             4 Genus Stygiolobus Segerer et al. 1991
            Count: -
             5 Genus Sulfurisphaera Kurosawa et al. 1998
            Count: -
             6 Genus Sulfurococcus Golovacheva et al. 1995
            Count: -