procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Proteobacteria Garrity and Holt 2001 nom. nud. see Phylum Proteobacteria Garrity et al. 2005 stat. inval.
       Class "Alphaproteobacteria" "Garrity and Holt 2001" nom. nud. see Class Alphaproteobacteria Garrity et al. 2006
         Order "Rhizobiales" "Garrity and Holt 2001" nom. nud. see Order Rhizobiales Kuykendall 2006
           Family Rhizobiaceae Conn 1938 (Approved Lists 1980)
             1 Genus Rhizobium Frank 1889 (Approved Lists 1980) nom. cons.
             2 Genus Agrobacterium Conn 1942 (Approved Lists 1980) nom. cons.
             3 Genus Allorhizobium de Lajudie et al. 1998
             4 Genus Carbophilus Meyer et al. 1994
             5 Genus Chelatobacter Auling et al. 1993 see Genus Aminobacter Urakami et al. 1992
             6 Genus Ensifer Casida 1982
             7 Genus Sinorhizobium Chen et al. 1988 see Genus Ensifer Casida 1982