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 Thiotrichales Garrity et al. 2005
                     Family Piscirickettsiaceae Fryer and Lannan 2005
                       Genus Methylophaga Janvier et al. 1985
                         01 Methylophaga alcalica Doronina et al. 2003
                         02 Methylophaga aminisulfidivorans Kim et al. 2007
                         03 Methylophaga frappieri Villeneuve et al. 2013
                         04 Methylophaga lonarensis Antony et al. 2012
                         05 Methylophaga marina Janvier et al. 1985
                         06 Methylophaga muralis corrig. Doronina et al. 2011
                         07 Methylophaga nitratireducenticrescens Villeneuve et al. 2013
                         08 Methylophaga sulfidovorans de Zwart et al. 1998
                         09 Methylophaga thalassica Janvier et al. 1985
                         10 Methylophaga thiooxydans corrig. Boden et al. 2011