Domain Bacteria Woese et al. 1990
   Phylum Actinobacteria Garrity and Holt 2001
     Class Actinobacteria Stackebrandt et al. 1997
       Subclass Actinobacteridae Stackebrandt et al. 1997 see Class Actinobacteria Stackebrandt et al. 1997
         Order Actinomycetales Buchanan 1917 (Approved Lists 1980)
           Suborder Actinomycineae Stackebrandt et al. 1997
             Family Actinomycetaceae Buchanan 1918 (Approved Lists 1980)
               Genus Actinomyces Harz 1877 (Approved Lists 1980)