prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Actinobacteria" Garrity and Holt 2001
       Class Actinobacteria Stackebrandt et al. 1997
         1 Order Acidothermales Sen et al. 2014 [monotypic]
         2 Order Actinomycetales Buchanan 1917 (Approved Lists 1980)
         3 Order Bifidobacteriales Stackebrandt et al. 1997 [monotypic]
         4 Order Frankiales Sen et al. 2014
         5 Order Geodermatophilales Sen et al. 2014 [monotypic]
         6 Order Kineosporiales Kämpfer 2015 [monotypic]
         7 Order Micrococcales Prévot 1940 (Approved Lists 1980)
         8 Order Nakamurellales Sen et al. 2014 [monotypic]
         9 Order Nitriliruptorales Sorokin et al. 2009 [monotypic]