Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum "Proteobacteria" Craig et al. 2010
               Phylum "Gammaproteobacteria" Garrity et al., 2005 [monotypic]
                 Class Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Methylococcales Bowman 2005
                     Family Methylococcaceaeᵀ Whittenbury and Krieg 1984
                       Genus Methyloglobulus Deutzmann et al. 2015
                       Genus Methylomagnum Khalifa et al. 2015
                       01 Genus Methylococcusᵀ Foster and Davis 1966 (Approved Lists 1980)
                       02.1 Genus Methylobacter Bowman et al. 1993
                       02.2 Genus Methyloprofundus Tavormina et al. 2015 [monotypic]
                       03.1 Genus Methylocaldum Bodrossy et al. 1998
                       03.2 Genus Methyloparacoccus Hoefman et al. 2014 [monotypic]
                       04 Genus Methylogaea Geymonat et al. 2011 [monotypic]
                       05 Genus Methylomarinum Hirayama et al. 2013 [monotypic]
                       06 Genus Methylomicrobium Bowman et al. 1995
                       07 Genus Methylomonas (ex Leadbetter 1974) Whittenbury and Krieg 1984
                       08 Genus Methylosarcina Wise et al. 2001
                       09 Genus Methylosoma Rahalkar et al. 2007 [monotypic]
                       10 Genus Methylosphaera Bowman et al. 1998 [monotypic]
                       11 Genus Methylovulum Iguchi et al. 2011 [monotypic]