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 Neisseriales Tønjum 2006
                     Family Neisseriaceaeᵀ Prévot 1933 (Approved Lists 1980)
                       Genus Kingella Henriksen and Bøvre 1976 (Approved Lists 1980)
                         1 Kingella denitrificans Snell and Lapage 1976 (Approved Lists 1980)
                         2 Kingella kingaeᵀ (Henriksen and Bøvre 1968) Henriksen and Bøvre 1976 (Approved Lists 1980)
                         3 Kingella oralis corrig. Dewhirst et al. 1993
                         4 Kingella potus Lawson et al. 2005