[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryota
     Kingdom Bacteria Cavalier-Smith 2002 - bacteria see Domain Bacteria Woese et al. 1990
       Subkingdom Posibacteria Cavalier-Smith 1987 see Domain Bacteria Woese et al. 1990
         Phylum Actinobacteria Garrity and Holt 2001 [monotypic]
           Class Actinobacteria Stackebrandt et al. 1997
             01 Order Acidimicrobiales Stackebrandt et al. 1997
             02 Order Actinomycetales Buchanan 1917 (Approved Lists 1980)
             03 Order Bifidobacteriales Stackebrandt et al. 1997
             04 Order Coriobacteriales Stackebrandt et al. 1997
             05 Order Euzebyales Kurahashi et al. 2010
             06 Order Gaiellales Albuquerque et al. 2012
             07 Order Nitriliruptorales Sorokin et al. 2009
             08 Order Rubrobacterales Rainey et al. 1997
             09 Order Solirubrobacterales Reddy and Garcia-Pichel 2009
             10 Order Thermoleophilales Reddy and Garcia-Pichel 2009