[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain "Archaea" Woese et al. 1990 stat. inval. see Domain Archaea Woese et al. 2024
     Phylum "Crenarchaeota" Garrity and Holt 2002 stat. inval. see Phylum Thermoproteota Garrity and Holt 2021
       Class Thermoprotei Reysenbach 2002
         1 Order Thermoproteales Zillig and Stetter 1982
         2 Order "Caldisphaerales" nom. ined. see Order Acidilobales Prokofeva et al. 2009
         3 Order Desulfurococcales Huber and Stetter 2002
         4 Order Sulfolobales Stetter 1989