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 "Alphaproteobacteria" Garrity et al., 2006 [monotypic]
                 Class Alphaproteobacteriaᵀ Garrity et al. 2006
                   Order Rhizobiales Kuykendall 2006
                     Family Beijerinckiaceae Garrity et al. 2006
                       Genus Pseudochelatococcus Kämpfer et al. 2015
                       1 Genus Beijerinckiaᵀ Derx 1950 (Approved Lists 1980)
                       2 Genus Camelimonas Kämpfer et al. 2010
                       3 Genus Chelatococcus Auling et al. 1993
                       4 Genus Methylocapsa Dedysh et al. 2002
                       5 Genus Methylocella Dedysh et al. 2000
                       6 Genus Methyloferula Vorobev et al. 2011 [monotypic]
                       7 Genus Methylorosula Berestovskaya et al. 2012 [monotypic]
                       8 Genus Methylovirgula Vorob'ev et al. 2009 [monotypic]