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 Burkholderiales Garrity et al. 2006
                     Family Alcaligenaceae De Ley et al. 1986
                       Genus Verticia Vandamme et al. 2015
                       01 Genus Azohydromonas Xie and Yokota 2005
                       02 Genus Alcaligenesᵀ Castellani and Chalmers 1919 (Approved Lists 1980)
                       03 Genus Achromobacter Yabuuchi and Yano 1981
                       04 Genus Advenella Coenye et al. 2005
                       05 Genus Basilea Whiteson et al. 2014 [monotypic]
                       06 Genus Bordetella Moreno-López 1952 (Approved Lists 1980)
                       07 Genus Brackiella Willems et al. 2002 [monotypic]
                       08 Genus Castellaniella Kämpfer et al. 2006
                       09 Genus Derxia Jensen et al. 1960 (Approved Lists 1980)
                       10 Genus Kerstersia Coenye et al. 2003
                       11 Genus Oligella Rossau et al. 1987
                       12 Genus Paenalcaligenes Kämpfer et al. 2010
                       13 Genus Paralcaligenes Kim et al. 2011 [monotypic]
                       14 Genus Pelistega Vandamme et al. 1998
                       15 Genus Pigmentiphaga Blümel et al. 2001
                       16.1 Genus Pusillimonas Stolz et al. 2005 [monotypic]
                       16.2 Genus Candidimonas Vaz-Moreira et al. 2011
                       16.3.1 Genus Parapusillimonas Kim et al. 2010 [monotypic]
                       16.3.2 Genus Eoetvoesia Felföldi et al. 2014, nom. illeg. [monotypic]
                       17 Genus Taylorella Sugimoto et al. 1984