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 "Actinobacteria" Garrity and Holt 2001
                 Class Rubrobacteria Suzuki 2013
                   Order Rubrobacteralesᵀ Rainey et al. 1997 [monotypic]
                     Suborder "Rubrobacterineae"ᵀ Garrity & Holt, 2001 [monotypic]
                       Family Rubrobacteraceaeᵀ Rainey et al. 1997 [monotypic]
                         Genus Rubrobacterᵀ Suzuki et al. 1989
                           Rubrobacter xylanophilus Carreto et al. 1996