prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Deinococcus-Thermus" [monotypic]
       Class Deinococci Garrity and Holt 2002
         Order Thermales Rainey and Da Costa 2002 [monotypic]
           Family Thermaceae Da Costa and Rainey 2002
             Genus Meiothermus Nobre et al. 1996