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 Chloroflexi Garrity and Holt 2001
                 Class Thermomicrobia Garrity and Holt 2002
                   Order Thermomicrobialesᵀ Garrity and Holt 2002 [monotypic]
                     Family Thermomicrobiaceaeᵀ Garrity and Holt 2002 [monotypic]
                       Genus Thermomicrobiumᵀ Jackson et al. 1973 (Approved Lists 1980)
                         1 Thermomicrobium fosteri Phillips and Perry 1976 (Approved Lists 1980)
                         2 Thermomicrobium roseumᵀ Jackson et al. 1973 (Approved Lists 1980)