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 "Betaproteobacteria" Garrity et al., 2006 [monotypic]
                 Class Betaproteobacteriaᵀ Garrity et al. 2006
                   Order Methylophilales Garrity et al. 2006 [monotypic]
                     Family Methylophilaceaeᵀ Garrity et al. 2006
                       1 Genus Methylophilusᵀ Jenkins et al. 1987
                       2 Genus Methylobacillus Yordy and Weaver 1977 (Approved Lists 1980)
                       3 Genus Methylotenera Kalyuzhnaya et al. 2006
                       4 Genus Methylovorus Govorukhina and Trotsenko 1991