prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Gammaproteobacteria Garrity et al. 2005
         Order Legionellales Garrity et al. 2005
           Family Coxiellaceae Garrity et al. 2005
             1 Genus Aquicella Santos et al. 2004
             2 Genus Coxiella (Philip 1943) Philip 1948 (Approved Lists 1980)
             3 Genus Diplorickettsia Mediannikov et al. 2011