Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           Domain "Bacteria" Woese et al. 1990
             Phylum "Actinobacteria" Stackebrandt et al. 1997
               1.1.1.1 Class Actinobacteriaᵀ Stackebrandt et al. 1997
               1.1.1.1.0 [Class Actinomycetes Krasil'nikov 1949] see Class Actinobacteria Stackebrandt et al. 1997
               1.1.1.2 Class Nitriliruptoria Ludwig et al. 2013
               1.1.2 Class Acidimicrobiia Norris 2013 [monotypic]
               1.2 Class Coriobacteriia König 2013 [monotypic]
               2.1 Class Thermoleophilia Suzuki & Whitman 2013
               2.2 Class Rubrobacteria Suzuki 2013