[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Gammaproteobacteria Garrity et al. 2005
         Order Methylococcales Bowman 2005
           Family Methylococcaceae Whittenbury and Krieg 1984
             Genus Methylobacter Bowman et al. 1993
               1 Methylobacter luteus (Romanovskaya et al. 1981) Bowman et al. 1993
               2 Methylobacter marinus Bowman et al. 1993
               3 Methylobacter psychrophilus Omel'chenko et al. 2000
               4 Methylobacter tundripaludum Wartiainen et al. 2006
               5 Methylobacter whittenburyi (Romanovskaya et al. 1981) Bowman et al. 1993