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 Acidothermales Sen et al. 2014 [monotypic]
           Family Acidothermaceae Rainey et al. 1997 [monotypic]
             Genus Acidothermus Mohagheghi et al. 1986