[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain "Archaea" Woese et al. 1990
     Phylum "Euryarchaeota" Garrity and Holt 2001
       Class Thermoplasmata Reysenbach 2002
         Order Thermoplasmatales Reysenbach 2002
           Family Picrophilaceae Schleper et al. 1996
             Genus Picrophilus Schleper et al. 1996
               1 Picrophilus oshimae Schleper et al. 1996
               2 Picrophilus torridus Zillig et al. 1996