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 Chromatiales Imhoff 2005
                     Family Halothiobacillaceae Kelly and Wood 2005
                       1 Genus Halothiobacillusᵀ Kelly and Wood 2000
                       2 Genus Thioalkalibacter Banciu et al. 2009 [monotypic]
                       3 Genus Thiofaba Mori and Suzuki 2008 [monotypic]
                       4 Genus Thiovirga Ito et al. 2005 [monotypic]