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 Legionellales Garrity et al. 2005
                     Family Legionellaceaeᵀ Brenner et al. 1979 (Approved Lists 1980) [monotypic]
                       Genus Legionellaᵀ Brenner et al. 1979 (Approved Lists 1980)
                         Legionella pneumophilaᵀ Brenner et al. 1979 (Approved Lists 1980)
                           1 Legionella pneumophila subsp. pneumophilaᵀ (Brenner et al. 1979) Brenner et al. 1989
                           2 Legionella pneumophila subsp. fraseri Brenner et al. 1989
                           3 Legionella pneumophila subsp. pascullei Brenner et al. 1989