Procaryotic Genera
Count: [*] 25p;39c;84o;215f;1008g [28 May 2016]
   Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
  Count: [*] 23p;31c;72o;194f;935g [28 May 2016]
     Phylum Proteobacteria Garrity and Holt 2001 nom. nud. see Phylum Proteobacteria Garrity et al. 2005 stat. inval.
    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 Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980) [monotypic]
        Count: [*] 1f;4g [27 May 2016]
           1 Family Caulobacteraceae Henrici and Johnson 1935 (Approved Lists 1980)
          Count: [*] 4g [27 May 2016]