Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
       Class "Alphaproteobacteria" Garrity and Holt 2001 nom. nud. see Class Alphaproteobacteria Garrity et al. 2006
         Order Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980)
           1 Family Rhodospirillaceae Pfennig and Trüper 1971 (Approved Lists 1980)
           2 Family Acetobacteraceae (ex Henrici 1939) Gillis and De Ley 1980