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
         Order Gaiellales Albuquerque et al. 2012 [monotypic]
           Family Gaiellaceae Albuquerque et al. 2012 [monotypic]
             Genus Gaiella Albuquerque et al. 2012