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 Hafniaceae Adeolu et al. 2016
                       1 Genus Edwardsiella Ewing and McWhorter 1965 (Approved Lists 1980)
                       2 Genus Hafniaᵀ Møller 1954 (Approved Lists 1980)
                       3 Genus Obesumbacterium Shimwell 1963 (Approved Lists 1980) [monotypic]