prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Actinobacteria" Garrity and Holt 2001
       Class Coriobacteriia König 2013
         Order Coriobacteriales Stackebrandt et al. 1997 [monotypic]
           Suborder "Coriobacterineae" Garrity & Holt, 2001
             Family Atopobiaceae Gupta et al. 2013
               Genus Olsenella Dewhirst et al. 2001