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 Cellvibrionales Spring et al. 2015
           Family Porticoccaceae Spring et al. 2015 [monotypic]
             1 Genus Porticoccus Oh et al. 2010