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 Thermusᵀ Brock and Freeze 1969 (Approved Lists 1980)
                         1 Thermus antranikianii Chung et al. 2000
                         2 Thermus aquaticusᵀ Brock and Freeze 1969 (Approved Lists 1980)
                         3 Thermus brockianus Williams et al. 1995
                         4 Thermus filiformis Hudson et al. 1987
                         5 Thermus igniterrae Chung et al. 2000
                         6 Thermus oshimai Williams et al. 1996
                         7 Thermus scotoductus Kristjansson et al. 1994
                         8 Thermus thermophilus (ex Oshima and Imahori 1974) Manaia et al. 1995