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
         Order Actinomycetales Buchanan 1917 (Approved Lists 1980)
           Suborder Actinomycineae Stackebrandt et al. 1997 [monotypic]
             Family Actinomycetaceae Buchanan 1918 (Approved Lists 1980)
               1 Genus Actinobaculum Lawson et al. 1997
               2 Genus Actinomyces Harz 1877 (Approved Lists 1980)
               3 Genus Actinotignum Yassin et al. 2015
               4 Genus Arcanobacterium Collins et al. 1983
               5 Genus Falcivibrio Hammann et al. 1984 see Genus Mobiluncus Spiegel and Roberts 1984
               6 Genus Flaviflexus Du et al. 2013
               7 Genus Mobiluncus Spiegel and Roberts 1984
               8 Genus Trueperella Yassin et al. 2011
               9 Genus Varibaculum Hall et al. 2003