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 Rhodobiaceae Garrity et al. 2006
                       Genus Rhodoligotrophos Fukuda et al. 2012
                       Genus Tepidamorphus Albuquerque et al. 2010
                       Genus Tepidicaulis Takeuchi et al. 2015
                       1.1 Genus Rhodobiumᵀ Hiraishi et al. 1995
                       1.2 Genus Afifella Urdiain et al. 2009
                       2 Genus Anderseniella Brettar et al. 2007 [monotypic]
                       3 Genus Lutibaculum Anil Kumar et al. 2012 [monotypic]
                       4 Genus Parvibaculum Schleheck et al. 2004
                       5 Genus Roseospirillum Glaeser and Overmann 2001 [monotypic]