procaryotes
   Domain Archaea Woese et al. 1990
     Phylum Euryarchaeota Garrity and Holt 2001
       Class Thermoplasmata Reysenbach 2001 see Class Thermoplasmata Reysenbach 2002
         1 Order Thermoplasmatales Reysenbach 2001 see Order Thermoplasmatales Reysenbach 2002