Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Pseudomonadotaᵀ Garrity et al. 2021
                 Class Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Enterobacterales Adeolu et al. 2016
                     Family Enterobacteriaceaeᵀ Rahn 1937 nom. cons. (Approved Lists 1980)
                       Genus Klebsiella Trevisan 1885 (Approved Lists 1980) nom. cons.
                         Klebsiella pneumoniae (Schroeter 1886) Trevisan 1887 (Approved Lists 1980)
                           1 Klebsiella pneumoniae subsp. ozaenae (Abel 1893) Ørskov 1984
                           2 Klebsiella pneumoniae subsp. pneumoniaeᵀ (Schroeter 1886) Ørskov 1984
                           3 Klebsiella pneumoniae subsp. rhinoscleromatis (Trevisan 1887) Ørskov 1984