Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Actinomycetota Goodfellow 2021
                 Class Rubrobacteria Suzuki 2013 [monotypic]
                   Order Rubrobacteralesᵀ Rainey et al. 1997 [monotypic]
                     Family Rubrobacteraceaeᵀ Rainey et al. 1997 [monotypic]
                       Genus Rubrobacterᵀ Suzuki et al. 1989
                         Rubrobacter xylanophilus Carreto et al. 1996