Domain Bacteria Woese et al. 1990
   Phylum Actinobacteria Garrity and Holt 2001
     Class Actinobacteria Stackebrandt et al. 1997
       Subclass Rubrobacteridae Rainey et al. 1997 see Class Rubrobacteria Suzuki 2013
         1 Order Rubrobacterales Rainey et al. 1997