Domain Bacteria Woese et al. 1990
Status: extant
   Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
  Status: extant
     Class "Gammaproteobacteria" nom. inval. see Class Gammaproteobacteria Garrity et al. 2005
    Status: extant
       Order "Methylococcales" nom. inval. see Order Methylococcales Bowman 2005
      Status: extant
         Family Methylococcaceae Whittenbury and Krieg 1984
        Status: extant
           Genus Methylobacter Bowman et al. 1993
          Status: extant