Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum "Deinococcus-Thermus" [monotypic]
       Class Deinococci Garrity and Holt 2001 nom. inval. see Class Deinococci Garrity and Holt 2002
         Order Thermales Rainey and Da Costa 2001 [monotypic] see Order Thermales Rainey and Da Costa 2002
           Family Thermaceae Da Costa and Rainey 2001 see Family Thermaceae Da Costa and Rainey 2002
             1 Genus Thermusᵀ Brock and Freeze 1969 (Approved Lists 1980)
             2 Genus Meiothermus Nobre et al. 1996