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 Oceanospirillales Garrity et al. 2005
                     Family Oceanospirillaceaeᵀ Garrity et al. 2005
                       Genus Oceanospirillumᵀ Hylemon et al. 1973 (Approved Lists 1980)
                         Oceanospirillum beijerinckii (Williams and Rittenberg 1957) Hylemon et al. 1973 (Approved Lists 1980)
                           Oceanospirillum beijerinckii subsp. pelagicum (Terasaki 1973) Pot et al. 1989