Domain Bacteria Woese et al. 1990
Count: [*] *
   Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
  Count: [*] *
     Class "Alphaproteobacteria" Garrity and Holt 2001 nom. nud. see Class Alphaproteobacteria Garrity et al. 2006
    Count: [*] *
       Order "Sphingomonadales" see Order Sphingomonadales Yabuuchi and Kosako 2006
      Count: [*] *
         Family "Sphingomonadaceae" Kosako et al. 2000
        Count: -
           Genus Zymomonas Kluyver and van Niel 1936 (Approved Lists 1980)
          Count: -