prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Actinobacteria" Garrity and Holt 2001
       Class Rubrobacteria Suzuki 2013
         1 Order Gaiellales Albuquerque et al. 2012 [monotypic]
         2 Order Rubrobacterales Rainey et al. 1997 [monotypic]
         3 Order Solirubrobacterales Reddy and Garcia-Pichel 2009