prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Archaea" Woese et al. 1990
     Phylum "Euryarchaeota" Garrity and Holt 2001
       Class Thermoplasmata Reysenbach 2002 [monotypic]
         Order Thermoplasmatales Reysenbach 2002
           Family Ferroplasmaceae Golyshina et al. 2000
             1 Genus Acidiplasma Golyshina et al. 2009
             2 Genus Ferroplasma Golyshina et al. 2000