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
                   "Alysiomicrobium bavaricum" Kragelund et al. 2006
                   Order Magnetococcales Bazylinski et al. 2013 [monotypic]
                   01 Genus Breoghania Gallego et al. 2011, incertae sedis [monotypic]
                   02 Genus Eilatimonas Paramasivam et al. 2013, incertae sedis [monotypic]
                   03 Genus Geminicoccus Foesel et al. 2008, incertae sedis [monotypic]
                   04 Genus Hartmannibacter Suarez et al. 2014, incertae sedis [monotypic]
                   05 Genus Methyloligella Doronina et al. 2014, incertae sedis
                   06 Genus Rhizomicrobium Ueki et al. 2010, incertae sedis
                   07 Order Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980)
                   08 Order Kordiimonadales Kwon et al. 2005
                   09 Order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980)
                   10 Order Rhodobacterales Garrity et al. 2006 [monotypic]
                   11 Order Sphingomonadales Yabuuchi and Kosako 2006
                   12 Order Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980)
                   13.1 Genus Phreatobacter Tóth et al. 2014, incertae sedis [monotypic]
                   13.2 Order Rhizobiales Kuykendall 2006
                   14 Order "Parvularculales" [monotypic]
                   15 Order Kiloniellales Wiese et al. 2009 [monotypic]
                   16 Order Sneathiellales Kurahashi et al. 2008 [monotypic]