Procaryotic Genera
Count: [*] 25p;39c;84o;215f;1008g [28 May 2016]
   Domain "Bacteria" Woese et al. 1990
  Count: [*] 23p;31c;72o;194f;935g [28 May 2016]
     Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
    Count: [*] 5c;34o;72f;430g [27 May 2016]
       Class "Alphaproteobacteria" Garrity and Holt 2001 nom. nud. see Class Alphaproteobacteria Garrity et al. 2006
      Count: [*] 6o;18f;133g [27 May 2016]
         Order "Rhizobiales" see Order Rhizobiales Kuykendall 2006
        Count: [*] 10f;56g [27 May 2016]
           Family Brucellaceae Breed et al. 1957 (Approved Lists 1980)
          Count: [*] 3g [27 May 2016]
             Genus Brucella Meyer and Shaw 1920 (Approved Lists 1980)
            Count: -