[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Prokaryota
     Kingdom Bacteria Cavalier-Smith 2002 - bacteria see Domain Bacteria Woese et al. 1990
       Subkingdom Negibacteria Cavalier-Smith 2002 - negibacteria see Domain Bacteria Woese et al. 1990
         Phylum Proteobacteria Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
           Class Betaproteobacteria Garrity et al. 2006
             1 Genus Chitinivorax Chen et al. 2012
             2 Order Burkholderiales Garrity et al. 2006
             3 Order Hydrogenophilales Garrity et al. 2006
             4 Order Methylophilales Garrity et al. 2006
             5 Order Neisseriales Tønjum 2006
             6 Order Nitrosomonadales Garrity et al. 2006
             7 Order "Procabacteriales" Garrity et al., 2003
             8 Order Rhodocyclales Garrity et al. 2006