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 Shigella Castellani and Chalmers 1919 (Approved Lists 1980)
                         1 Shigella boydii Ewing 1949 (Approved Lists 1980)
                         2 Shigella dysenteriaeᵀ (Shiga 1897) Castellani and Chalmers 1919 (Approved Lists 1980)
                         3 Shigella flexneri Castellani and Chalmers 1919 (Approved Lists 1980)
                         4 Shigella sonnei (Levine 1920) Weldin 1927 (Approved Lists 1980)