[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain "Archaea" Woese et al. 1990
     Phylum "Crenarchaeota" Garrity and Holt 2001
       Class Thermoprotei Reysenbach 2002
         Order Sulfolobales Stetter 1989
           Family Sulfolobaceae Stetter 1989
             Genus Sulfolobus Brock et al. 1972 (Approved Lists 1980)
               1 Sulfolobus acidocaldarius Brock et al. 1972 (Approved Lists 1980)
               2 Sulfolobus metallicus Huber and Stetter 1992
               3 Sulfolobus shibatae Grogan et al. 1991
               4 Sulfolobus solfataricus Zillig et al. 1980
               5 Sulfolobus tokodaii Suzuki et al. 2002
               6 Sulfolobus yangmingensis Jan et al. 1999