Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum "Deinococcus-Thermus" [monotypic]
                 Class Deinococciᵀ Garrity and Holt 2002
                   Order Thermales Rainey and Da Costa 2002 [monotypic]
                     Family Thermaceaeᵀ Da Costa and Rainey 2002
                       Genus Rhabdothermus Steinsbu et al. 2011
                       1.1 Genus Thermusᵀ Brock and Freeze 1969 (Approved Lists 1980)
                       1.2 Genus Meiothermus Nobre et al. 1996
                       2 Genus Marinithermus Sako et al. 2003 [monotypic]
                       3 Genus Oceanithermus Miroshnichenko et al. 2003
                       4 Genus Vulcanithermus Miroshnichenko et al. 2003 [monotypic]