prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Alphaproteobacteria Garrity et al. 2006
         Order Rhizobiales Kuykendall 2006
           Family Beijerinckiaceae Garrity et al. 2006
             1 Genus Beijerinckia Derx 1950 (Approved Lists 1980)
             2 Genus Camelimonas Kämpfer et al. 2010
             3 Genus Chelatococcus Auling et al. 1993
             4 Genus Methylocapsa Dedysh et al. 2002
             5 Genus Methylocella Dedysh et al. 2000
             6 Genus Methyloferula Vorobev et al. 2011
             7 Genus Methylorosula Berestovskaya et al. 2012
             8 Genus Methylovirgula Vorob'ev et al. 2009
             9 Genus Pseudochelatococcus Kämpfer et al. 2015