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 Alphaproteobacteria Garrity et al. 2006
                   Order Hyphomicrobiales Douglas 1957 (Approved Lists 1980)
                     Family Kaistiaceae Hördt et al. 2020
                       Genus Prosthecomicrobium Staley 1968 (Approved Lists 1980)
                         1 Prosthecomicrobium enhydrum Staley 1968 (Approved Lists 1980)
                         2 Prosthecomicrobium hirschii Staley 1984
                         3 Prosthecomicrobium mishustinii Vasil'eva et al. 2009
                         4 Prosthecomicrobium pneumaticum Staley 1968 (Approved Lists 1980)