Domain Bacteria Woese et al. 1990 Phylum Actinobacteria Garrity and Holt 2001 Class Actinobacteria Stackebrandt et al. 1997 Subclass Acidimicrobidae Stackebrandt et al. 1997 see Class Acidimicrobiia Norris 2013 Order Acidimicrobiales Stackebrandt et al. 1997 Suborder "Acidimicrobineae" Garrity & Holt, 2001 Family Acidimicrobiaceae Stackebrandt et al. 1997 1 Genus Acidimicrobium Clark and Norris 1996