[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 Neisseria Trevisan 1885 (Approved Lists 1980)
               [Neisseria elongata] Bøvre and Holten 1970 (Approved Lists 1980)
                 1 Neisseria elongata subsp. elongataᵀ (Bøvre and Holten 1970) Henriksen and Holten 1976 (Approved Lists 1980)
                 2 Neisseria elongata subsp. glycolytica Henriksen and Holten 1976 (Approved Lists 1980)
                 3 Neisseria elongata subsp. nitroreducens Grant et al. 1991