[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   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
         Order Neisseriales Tønjum 2006
           Family Neisseriaceae Prévot 1933 (Approved Lists 1980)
             Genus Kingella Henriksen and Bøvre 1976 (Approved Lists 1980)
               1 Kingella kingae (Henriksen and Bøvre 1968) Henriksen and Bøvre 1976 (Approved Lists 1980)
               2 Kingella denitrificans Snell and Lapage 1976 (Approved Lists 1980)
               3 Kingella oralis corrig. Dewhirst et al. 1993
               4 Kingella potus Lawson et al. 2005