prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Actinobacteria" Garrity and Holt 2001
       Class Acidimicrobiia Norris 2013 [monotypic]
         Order Acidimicrobiales Stackebrandt et al. 1997 [monotypic]
           Suborder "Acidimicrobineae" Garrity & Holt, 2001
             Family Acidimicrobiaceae Stackebrandt et al. 1997
               Genus Acidimicrobium Clark and Norris 1996