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 Castellaniella Kämpfer et al. 2006
                         1 Castellaniella caeni Liu et al. 2008
                         2 Castellaniella daejeonensis Lee et al. 2010
                         3 Castellaniella defragrans (Foss et al. 1998) Kämpfer et al. 2006
                         4 Castellaniella denitrificans Kämpfer et al. 2006
                         5 Castellaniella ginsengisoli Kim et al. 2009
                         6 Castellaniella hirudinis Glaeser et al. 2013