Class Proteobacteria Stackebrandt et al. 1988 nom. rej. see Phylum Proteobacteria Garrity and Holt 2001 nom. nud.
   Subclass alpha see Class Alphaproteobacteria "Garrity and Holt 2001" nom. nud.
     Group 4 see Order Sphingomonadales "Garrity and Holt 2001" nom. nud.
       Family Sphingomonadaceae Kosako et al. 2000
         Genus Zymomonas Kluyver and van Niel 1936 (Approved Lists 1980)
           Zymomonas mobilis (Lindner 1928) Kluyver and van Niel 1936 (Approved Lists 1980)