[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 Desulfurococcales Huber and Stetter 2002
           Family Desulfurococcaceae Zillig and Stetter 1983
             Genus Ignisphaera Niederberger et al. 2006
               1 Ignisphaera aggregans Niederberger et al. 2006