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 "Gammaproteobacteria" Garrity et al., 2005 [monotypic]
                 Class Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order "Enterobacteriales" Garrity and Holt 2001 nom. nud. [monotypic]
                     Family Enterobacteriaceaeᵀ Rahn 1937 (Approved Lists 1980)
                       Genus Klebsiella Trevisan 1885 (Approved Lists 1980)
                         1 Klebsiella granulomatis (Aragão and Vianna 1913) Carter et al. 1999
                         2 Klebsiella michiganensis Saha et al. 2013
                         3 Klebsiella oxytoca (Flügge 1886) Lautrop 1956 (Approved Lists 1980)
                         4 Klebsiella pneumoniae (Schroeter 1886) Trevisan 1887 (Approved Lists 1980)
                         5 Klebsiella quasipneumoniae Brisse et al. 2014
                         6 Klebsiella singaporensis Li et al. 2004
                         7 Klebsiella variicola Rosenblueth et al. 2004