Domain Bacteria Woese et al. 1990
   Phylum Actinobacteria Garrity and Holt 2001
     Class Actinobacteria Stackebrandt et al. 1997
       1 Subclass Acidimicrobidae Stackebrandt et al. 1997 see Class Acidimicrobiia Norris 2013
       2 Subclass Rubrobacteridae Rainey et al. 1997 see Class Rubrobacteria Suzuki 2013
       3 Subclass Coriobacteridae Stackebrandt et al. 1997 see Class Coriobacteriia König 2013
       4 Subclass Sphaerobacteridae Stackebrandt et al. 1997
       5 Subclass Actinobacteridae Stackebrandt et al. 1997 see Class Actinobacteria Stackebrandt et al. 1997