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 Alphaproteobacteria Garrity et al. 2006
         Order Rhizobiales Kuykendall 2006
           Family Bradyrhizobiaceae Garrity et al. 2006
             01 Genus Afipia Brenner et al. 1992
             02 Genus Agromonas Ohta and Hattori 1985 see Genus Bradyrhizobium Jordan 1982
             03 Genus Balneimonas corrig. Takeda et al. 2004 see Genus Microvirga Kanso and Patel 2003
             04 Genus Blastobacter Zavarzin 1961 (Approved Lists 1980)
             05 Genus Bosea Das et al. 1996
             06 Genus Bradyrhizobium Jordan 1982
             07 Genus Nitrobacter Winogradsky 1892 (Approved Lists 1980)
             08 Genus Oligotropha Meyer et al. 1994
             09 Genus Rhodoblastus Imhoff 2001
             10 Genus Rhodopseudomonas Czurda and Maresch 1937 (Approved Lists 1980)
             11 Genus Salinarimonas Liu et al. 2010
             12 Genus Tardiphaga De Meyer et al. 2012